Best desktop PCs, ranked on official ENERGY STAR specs

Official ENERGY STAR certified desktop computers, including official thin clients and official workstations, compared on the Computers V9.0 record. We score official TEC, official sleep-mode power, official short-idle power and official system memory for the certified configuration shown. Official workstation memory can be very large; values above 128 GB are clamped at 128 GB for scoring only, and the official figure is still shown. Missing official fields are shown as Not listed and score at the category minimum.

Updated 2026-11-1355 products compared4 scored criteriaHow this ranking works

Affiliate disclosure: We earn a commission if you buy through links on this page, at no extra cost to you. It never affects our rankings, which come from the published scoring formula. As an Amazon Associate I earn from qualifying purchases. Learn more.

Top pick

HP Z2 Mini G1a Workstation

Score 9.8/10 · Check price

Why it wins: Official TEC 2.8 kWh, official 128 GB memory. Official ENERGY STAR record lists a TEC of 2.8 kWh.. Official ENERGY STAR record lists 128 GB of system memory for this certified configuration..

Also great: Framework FRAMPA0000 (9.1) · Lenovo ThinkStation P3 Tower Gen 2 (9.0)

9.8/10

Check price at Amazon See pros, cons & specs

Side-by-side comparison

Swipe sideways on mobile. Green marks the best figure in each column.

Product	Score	Official TEC	Official sleep power	Official short-idle power	Official system memory	Best for	Price	Buy
1 H HP Z2 Mini G1a Workstation	9.8/10	2.8 kWh	1.1 W	4.6 W	128 GB	Official TEC 2.8 kWh, official 128 GB memory	Check price	View deal
2 F Framework FRAMPA0000	9.1/10	31.6 kWh	0.9 W	10.2 W	128 GB	Official TEC 31.6 kWh, official 128 GB memory	Check price	View deal
3 L Lenovo ThinkStation P3 Tower Gen 2	9.0/10	9.2 kWh	2.2 W	16.5 W	128 GB	Official TEC 9.2 kWh, official 128 GB memory	Check price	View deal
4 L Lenovo ThinkStation P3 Tiny Gen 2	8.9/10	11.7 kWh	1.1 W	25 W	128 GB	Official TEC 11.7 kWh, official 128 GB memory	Check price	View deal
5 A Aopen BC3135	8.8/10	11.5 kWh	0.9 W	2.7 W	64 GB	Official TEC 11.5 kWh, official 64 GB memory	Check price	View deal
6 A Apple Mac mini (M5 Pro)	8.7/10	19.2 kWh	0.8 W	4.7 W	64 GB	Official TEC 19.2 kWh, official 64 GB memory	Check price	View deal
7 D Dell D18S (FCS1250)	8.6/10	9.4 kWh	2.8 W	22.5 W	128 GB	Official TEC 9.4 kWh, official 128 GB memory	Check price	View deal
8 A Aopen BC5140	8.4/10	14.3 kWh	0.6 W	4.3 W	32 GB	Official TEC 14.3 kWh, official 32 GB memory	Check price	View deal
9 A ASUS NUC16WCK	8.4/10	18 kWh	2 W	2.9 W	64 GB	Official TEC 18 kWh, official 64 GB memory	Check price	View deal
10 H HP Z2 Mini G1i Workstation	8.4/10	5.8 kWh	3.8 W	8.9 W	96 GB	Official TEC 5.8 kWh, official 96 GB memory	Check price	View deal
11 AC Ace Computers VS-DMX300	8.2/10	10 kWh	0.4 W	8.6 W	32 GB	Official TEC 10 kWh, official 32 GB memory	Check price	View deal
12 A Acer D25Q2	8.2/10	16.9 kWh	0.7 W	5 W	32 GB	Official TEC 16.9 kWh, official 32 GB memory	Check price	View deal
13 A Apple Mac mini (M4 Pro)	8.2/10	15 kWh	0.7 W	3.6 W	24 GB	Official TEC 15 kWh, official 24 GB memory	Check price	View deal
14 H HP Chromebox G4	8.2/10	18.9 kWh	0.8 W	4.8 W	32 GB	Official TEC 18.9 kWh, official 32 GB memory	Check price	View deal
15 L Lenovo ThinkCentre neo 50q Gen 7	8.2/10	15.4 kWh	1.3 W	3.3 W	32 GB	Official TEC 15.4 kWh, official 32 GB memory	Check price	View deal
16 A Acer D24Q1 (CXM1)	8.1/10	13.9 kWh	0.6 W	3.4 W	16 GB	Official TEC 13.9 kWh, official 16 GB memory	Check price	View deal
17 A Acer D26U11	8.1/10	13.6 kWh	0.8 W	3.1 W	16 GB	Official TEC 13.6 kWh, official 16 GB memory	Check price	View deal
18 A Apple Mac mini (M4)	8.1/10	12 kWh	0.6 W	2.8 W	16 GB	Official TEC 12 kWh, official 16 GB memory	Check price	View deal
19 A Apple Mac mini (M6)	8.1/10	12.9 kWh	0.7 W	2.9 W	16 GB	Official TEC 12.9 kWh, official 16 GB memory	Check price	View deal
20 A ASUS CF40	8.1/10	9.5 kWh	0.5 W	2.3 W	16 GB	Official TEC 9.5 kWh, official 16 GB memory	Check price	View deal
21 A ASUS VM31	8.1/10	11.1 kWh	0.4 W	3.4 W	16 GB	Official TEC 11.1 kWh, official 16 GB memory	Check price	View deal
22 H HP Z2 Mini G9 Workstation Desktop PC	8.1/10	9.7 kWh	1.1 W	18.8 W	64 GB	Official TEC 9.7 kWh, official 64 GB memory	Check price	View deal
23 H HP Z2 SFF G1i Workstation	8.1/10	8.8 kWh	5.8 W	15.7 W	192 GB	Official TEC 8.8 kWh, official 192 GB memory	Check price	View deal
24 L Lenovo ThinkStation P3 Tiny	8.1/10	11.3 kWh	0.8 W	21.4 W	64 GB	Official TEC 11.3 kWh, official 64 GB memory	Check price	View deal
25 L Lenovo Yoga Mini 01IPH11	8.1/10	16.9 kWh	1.4 W	3.7 W	32 GB	Official TEC 16.9 kWh, official 32 GB memory	Check price	View deal
26 AC Ace Computers Vision (VS-UDRB7X)	8.0/10	33.5 kWh	1 W	8.5 W	64 GB	Official TEC 33.5 kWh, official 64 GB memory	Check price	View deal
27 A AOPEN Chromebox Mini 2	8.0/10	15.5 kWh	0.6 W	3.9 W	8 GB	Official TEC 15.5 kWh, official 8 GB memory	Check price	View deal
28 H HP Z2 Tower G9 Workstation Desktop PC	8.0/10	19.4 kWh	2.6 W	34.2 W	128 GB	Official TEC 19.4 kWh, official 128 GB memory	Check price	View deal
29 L Lenovo Chromebox Micro	8.0/10	9.3 kWh	0.4 W	2.3 W	8 GB	Official TEC 9.3 kWh, official 8 GB memory	Check price	View deal
30 L Lenovo IdeaCentre Mini 01Q8X10	8.0/10	17.9 kWh	0.8 W	3.3 W	16 GB	Official TEC 17.9 kWh, official 16 GB memory	Check price	View deal
31 L Lenovo V100q	8.0/10	17.1 kWh	0.8 W	3.8 W	16 GB	Official TEC 17.1 kWh, official 16 GB memory	Check price	View deal
32 L Lenovo V105q	8.0/10	15 kWh	0.9 W	3.8 W	16 GB	Official TEC 15 kWh, official 16 GB memory	Check price	View deal
33 A Acer D25Q1	7.9/10	15.1 kWh	1.4 W	3.1 W	16 GB	Official TEC 15.1 kWh, official 16 GB memory	Check price	View deal
34 A ASUS NUC14MLK	7.9/10	15.3 kWh	1.3 W	3.4 W	16 GB	Official TEC 15.3 kWh, official 16 GB memory	Check price	View deal
35 L Lenovo ThinkCentre neo 50q QC	7.9/10	14.7 kWh	1.4 W	2.7 W	16 GB	Official TEC 14.7 kWh, official 16 GB memory	Check price	View deal
36 L LG CQ6 (CQ6-)	7.9/10	19.9 kWh	0.6 W	4.3 W	16 GB	Official TEC 19.9 kWh, official 16 GB memory	Check price	View deal
37 M Microsoft Windows 365 Link	7.9/10	14.1 kWh	0.9 W	3.6 W	8 GB	Official TEC 14.1 kWh, official 8 GB memory	Check price	View deal
38 L Lenovo ThinkCentre M75s Gen 6	7.8/10	17.1 kWh	3.1 W	11.9 W	64 GB	Official TEC 17.1 kWh, official 64 GB memory	Check price	View deal
39 M MSI Cubi B206	7.8/10	20.4 kWh	2 W	4 W	32 GB	Official TEC 20.4 kWh, official 32 GB memory	Check price	View deal
40 T Toshiba 4901-E17	7.8/10	33.9 kWh	1.8 W	7.9 W	64 GB	Official TEC 33.9 kWh, official 64 GB memory	Check price	View deal
41 I Intel NUC11ATK	7.7/10	20.3 kWh	0.6 W	5.2 W	4 GB	Official TEC 20.3 kWh, official 4 GB memory	Check price	View deal
42 D Dell D30M	7.6/10	16.7 kWh	3.2 W	42.5 W	128 GB	Official TEC 16.7 kWh, official 128 GB memory	Check price	View deal
43 D Dell D18U	7.5/10	7.6 kWh	4.3 W	14.6 W	64 GB	Official TEC 7.6 kWh, official 64 GB memory	Check price	View deal
44 D Dell D20U (FCM2250)	7.5/10	12.3 kWh	3.3 W	20.9 W	64 GB	Official TEC 12.3 kWh, official 64 GB memory	Check price	View deal
45 M MSI Cubi B213	7.3/10	25.6 kWh	2.2 W	5.5 W	16 GB	Official TEC 25.6 kWh, official 16 GB memory	Check price	View deal
46 AC Ace Computers VS-UDRX6X	7.2/10	36.6 kWh	1.3 W	9.2 W	32 GB	Official TEC 36.6 kWh, official 32 GB memory	Check price	View deal
47 I Intel NUC12WSH	7.1/10	27.6 kWh	2.6 W	5.2 W	16 GB	Official TEC 27.6 kWh, official 16 GB memory	Check price	View deal
48 M MSI Cubi B032	7.1/10	27.3 kWh	2.4 W	5.8 W	16 GB	Official TEC 27.3 kWh, official 16 GB memory	Check price	View deal
49 H HP Z2 Tower G1i Workstation	6.5/10	19.3 kWh	6.6 W	44.5 W	192 GB	Official TEC 19.3 kWh, official 192 GB memory	Check price	View deal
50 A Atrust Thin Client	5.5/10	15.1 kWh	Not listed	3.4 W	4 GB	Official TEC 15.1 kWh, official 4 GB memory	Check price	View deal
51 T Toshiba 4901-91C	5.4/10	38.4 kWh	Not listed	9.1 W	64 GB	Official TEC 38.4 kWh, official 64 GB memory	Check price	View deal
52 T Toshiba 4901-92C	5.3/10	40.3 kWh	Not listed	9.7 W	64 GB	Official TEC 40.3 kWh, official 64 GB memory	Check price	View deal
53 S Supermicro AS -3015A-I	4.8/10	52.8 kWh	7.7 W	91 W	128 GB	Official TEC 52.8 kWh, official 128 GB memory	Check price	View deal
54 S Supermicro SYS-551A-T	3.1/10	80.8 kWh	4.6 W	144.3 W	32 GB	Official TEC 80.8 kWh, official 32 GB memory	Check price	View deal
55 S Supermicro SYS-531A-I	2.3/10	79.3 kWh	81.3 W	96.8 W	64 GB	Official TEC 79.3 kWh, official 64 GB memory	Check price	View deal

"Not listed" means the official manufacturer specification table we used does not publish that figure. Prices show "Check price" until a retailer feed provides a current price.

A computer and its power adapter or internal power supply are mains-powered electrical devices. Use the official power adapter or a certified replacement, keep vents clear, and do not open an internal power supply. Notebook batteries are typically lithium-ion; do not crush, puncture, or incinerate them, and follow the maker's charging and travel guidance. Recycle batteries and electronics through a certified e-waste program. Official Typical Energy Consumption (TEC) is a certified laboratory annual-energy figure for the configuration shown, not a utility bill we measured. Confirm the current official specification, the installed processor, memory and storage, and the adapter rating with the maker and the retailer before you buy.

Every desktop PC, ranked

#1 · Top pick

HP Z2 Mini G1a Workstation

Best for: Official TEC 2.8 kWh, official 128 GB memory

9.8/10

What we like

Official ENERGY STAR record lists a TEC of 2.8 kWh.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	2.8 kWh
Official sleep power	1.1 W
Official short-idle power	4.6 W
Official system memory	128 GB
Official ENERGY STAR unique ID	3,999,664
Official model name	HP Z2 Mini G1a Workstation ENERGY STAR
Official model number	FCW-2402A
Official product type	Workstation
Official TEC	2.8 kWh
Official sleep mode power	1.1 W
Official short-idle power	4.6 W
Official long-idle power	4.1 W
Official off-mode power	0.6 W
Official system memory	128 GB
Official CPU cores	16
Official processor brand	AMD
Official processor name	RYZEN AI MAX+ PRO 395 with Radeon 8060S
Official CPU base clock	3 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-03-05T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

Framework FRAMPA0000

Best for: Official TEC 31.6 kWh, official 128 GB memory

9.1/10

What we like

Official ENERGY STAR record lists a TEC of 31.6 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.9 W.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	31.6 kWh
Official sleep power	0.9 W
Official short-idle power	10.2 W
Official system memory	128 GB
Official ENERGY STAR unique ID	4,429,230
Official model name	FRAMPA0000
Official model number	FRAMPA0000
Official product type	Desktop
Official TEC	31.6 kWh
Official sleep mode power	0.9 W
Official short-idle power	10.2 W
Official long-idle power	0.9 W
Official off-mode power	0.2 W
Official system memory	128 GB
Official CPU cores	16
Official processor brand	AMD
Official processor name	Ryzen AI MAX+ 395
Official CPU base clock	3 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-05-28T00:00:00.000
Official touch screen	No
Official internal PSU rated power	400 W
Price	Check price

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Specs sources:

Lenovo ThinkStation P3 Tower Gen 2

Best for: Official TEC 9.2 kWh, official 128 GB memory

9.0/10

What we like

Official ENERGY STAR record lists a TEC of 9.2 kWh.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	9.2 kWh
Official sleep power	2.2 W
Official short-idle power	16.5 W
Official system memory	128 GB
Official ENERGY STAR unique ID	4,479,455
Official model name	ThinkStation P3 Tower Gen 2
Official model number	30HSS1NE00
Official product type	Workstation
Official TEC	9.2 kWh
Official sleep mode power	2.2 W
Official short-idle power	16.5 W
Official long-idle power	12.8 W
Official off-mode power	1 W
Official system memory	128 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	Core Ultra 9 285K
Official CPU base clock	3.7 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-07-22T00:00:00.000
Official 'marketed as a workstation'	Yes
Other official certified configurations	The ENERGY STAR record lists 3 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (9.2 kWh). Other official TEC values listed for this model include 30.1, 33.4.
Price	Check price

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Specs sources:

Lenovo ThinkStation P3 Tiny Gen 2

Best for: Official TEC 11.7 kWh, official 128 GB memory

8.9/10

What we like

Official ENERGY STAR record lists a TEC of 11.7 kWh.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	11.7 kWh
Official sleep power	1.1 W
Official short-idle power	25 W
Official system memory	128 GB
Official ENERGY STAR unique ID	4,437,396
Official model name	ThinkStation P3 Tiny Gen 2
Official model number	30K5
Official product type	Workstation
Official TEC	11.7 kWh
Official sleep mode power	1.1 W
Official short-idle power	25 W
Official long-idle power	12.4 W
Official off-mode power	0.5 W
Official system memory	128 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	Core Ultra 9 285
Official CPU base clock	2.5 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-06-12T00:00:00.000
Official 'marketed as a workstation'	Yes
Other official certified configurations	The ENERGY STAR record lists 3 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (11.7 kWh). Other official TEC values listed for this model include 11.7.
Price	Check price

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Specs sources:

Aopen BC3135

Best for: Official TEC 11.5 kWh, official 64 GB memory

8.8/10

What we like

Official ENERGY STAR record lists a TEC of 11.5 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.9 W.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	11.5 kWh
Official sleep power	0.9 W
Official short-idle power	2.7 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,669,054
Official model name	BC3135
Official model number	AOPEN Chromebox Mini 3
Official product type	Desktop
Official TEC	11.5 kWh
Official sleep mode power	0.9 W
Official short-idle power	2.7 W
Official long-idle power	0.9 W
Official off-mode power	0.2 W
Official system memory	64 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	N250
Official CPU base clock	1.1 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-07-13T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
Price	Check price

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Specs sources:

Apple Mac mini (M5 Pro)

Best for: Official TEC 19.2 kWh, official 64 GB memory

8.7/10

What we like

Official ENERGY STAR record lists a TEC of 19.2 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.8 W.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	19.2 kWh
Official sleep power	0.8 W
Official short-idle power	4.7 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,693,496
Official model name	Mac mini (M5 Pro)
Official model number	A3535
Official product type	Desktop
Official TEC	19.2 kWh
Official sleep mode power	0.8 W
Official short-idle power	4.7 W
Official long-idle power	4.2 W
Official off-mode power	0.1 W
Official system memory	64 GB
Official CPU cores	18
Official processor brand	Apple
Official processor name	Apple M5 Pro
Official CPU base clock	4.2 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-08-17T00:00:00.000
Official touch screen	No
Official internal PSU rated power	155 W
Price	Check price

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Specs sources:

Dell D18S (FCS1250)

Best for: Official TEC 9.4 kWh, official 128 GB memory

8.6/10

What we like

Official ENERGY STAR record lists a TEC of 9.4 kWh.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	9.4 kWh
Official sleep power	2.8 W
Official short-idle power	22.5 W
Official system memory	128 GB
Official ENERGY STAR unique ID	4,016,022
Official model name	D18S
Official model number	FCS1250
Official product type	Workstation
Official TEC	9.4 kWh
Official sleep mode power	2.8 W
Official short-idle power	22.5 W
Official long-idle power	2.8 W
Official off-mode power	0.2 W
Official system memory	128 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	Core Ultra 9 285
Official CPU base clock	2.5 GHz
Official storage technology	Hard Disk Drive,Solid State Drive
Official ENERGY STAR date certified	2025-04-22T00:00:00.000
Official 'marketed as a workstation'	Yes
Other official certified configurations	The ENERGY STAR record lists 8 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (9.4 kWh). Other official TEC values listed for this model include 43.4, 47.2, 47.5, 72.2, 73.3, 79.9.
Price	Check price

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Specs sources:

Aopen BC5140

Best for: Official TEC 14.3 kWh, official 32 GB memory

8.4/10

What we like

Official ENERGY STAR record lists a TEC of 14.3 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.6 W.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	14.3 kWh
Official sleep power	0.6 W
Official short-idle power	4.3 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,669,154
Official model name	BC5140
Official model number	AOPEN Chromebox Commercial 5
Official product type	Desktop
Official TEC	14.3 kWh
Official sleep mode power	0.6 W
Official short-idle power	4.3 W
Official long-idle power	0.6 W
Official off-mode power	0.1 W
Official system memory	32 GB
Official CPU cores	10
Official processor brand	Intel
Official processor name	Core 7 150U
Official CPU base clock	1.8 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-07-13T00:00:00.000
Official touch screen	No
Official external power supply rating	90 W
Price	Check price

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Specs sources:

ASUS NUC16WCK

Best for: Official TEC 18 kWh, official 64 GB memory

8.4/10

What we like

Official ENERGY STAR record lists a TEC of 18 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	18 kWh
Official sleep power	2 W
Official short-idle power	2.9 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,616,634
Official model name	NUC16WCK
Official model number	NUC16WCK
Official product type	Desktop
Official TEC	18 kWh
Official sleep mode power	2 W
Official short-idle power	2.9 W
Official long-idle power	2 W
Official off-mode power	0.7 W
Official system memory	64 GB
Official CPU cores	6
Official processor brand	Intel
Official processor name	Core 7
Official CPU base clock	1.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-05-27T00:00:00.000
Official touch screen	No
Official external power supply rating	90 W
Price	Check price

Check price at Amazon Full specs

Specs sources:

#10

HP Z2 Mini G1i Workstation

Best for: Official TEC 5.8 kWh, official 96 GB memory

8.4/10

What we like

Official ENERGY STAR record lists a TEC of 5.8 kWh.
Official ENERGY STAR record lists 96 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	5.8 kWh
Official sleep power	3.8 W
Official short-idle power	8.9 W
Official system memory	96 GB
Official ENERGY STAR unique ID	3,998,733
Official model name	HP Z2 Mini G1i Workstation
Official model number	FCW-2401A
Official product type	Workstation
Official TEC	5.8 kWh
Official sleep mode power	3.8 W
Official short-idle power	8.9 W
Official long-idle power	6.1 W
Official off-mode power	0.7 W
Official system memory	96 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	Core Ultra 9285K
Official CPU base clock	3.7 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-02-19T00:00:00.000
Official 'marketed as a workstation'	Yes
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (5.8 kWh). Other official TEC values listed for this model include 5.8.
Price	Check price

Check price at Amazon Full specs

Specs sources:

#11

Ace Computers VS-DMX300

Best for: Official TEC 10 kWh, official 32 GB memory

8.2/10

What we like

Official ENERGY STAR record lists a TEC of 10 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.4 W.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	10 kWh
Official sleep power	0.4 W
Official short-idle power	8.6 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,518,229
Official model name	VS-DMX300
Official model number	VS-DMX300
Official product type	Desktop
Official TEC	10 kWh
Official sleep mode power	0.4 W
Official short-idle power	8.6 W
Official long-idle power	8.6 W
Official off-mode power	0.4 W
Official system memory	32 GB
Official CPU cores	8
Official processor brand	AMD
Official processor name	Ryzen 5
Official CPU base clock	3.8 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-01-28T00:00:00.000
Official touch screen	No
Official internal PSU rated power	120 W
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Specs sources:

#12

Acer D25Q2

Best for: Official TEC 16.9 kWh, official 32 GB memory

8.2/10

What we like

Official ENERGY STAR record lists a TEC of 16.9 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.7 W.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	16.9 kWh
Official sleep power	0.7 W
Official short-idle power	5 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,470,553
Official model name	D25Q2
Official model number	Acer Chromebox CXI6
Official product type	Desktop
Official TEC	16.9 kWh
Official sleep mode power	0.7 W
Official short-idle power	5 W
Official long-idle power	0.7 W
Official off-mode power	0.1 W
Official system memory	32 GB
Official CPU cores	10
Official processor brand	Intel
Official processor name	Core 7 150U
Official CPU base clock	1.8 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-07-08T00:00:00.000
Official touch screen	No
Official external power supply rating	90 W
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (16.9 kWh). Other official TEC values listed for this model include 17.1.
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Specs sources:

#13

Apple Mac mini (M4 Pro)

Best for: Official TEC 15 kWh, official 24 GB memory

8.2/10

What we like

Official ENERGY STAR record lists a TEC of 15 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.7 W.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	15 kWh
Official sleep power	0.7 W
Official short-idle power	3.6 W
Official system memory	24 GB
Official ENERGY STAR unique ID	4,513,880
Official model name	Mac mini (M4 Pro)
Official model number	A3239
Official product type	Desktop
Official TEC	15 kWh
Official sleep mode power	0.7 W
Official short-idle power	3.6 W
Official long-idle power	3 W
Official off-mode power	0.1 W
Official system memory	24 GB
Official CPU cores	12
Official processor brand	Apple
Official processor name	Apple M4 Pro
Official CPU base clock	3.9 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-10-16T00:00:00.000
Official touch screen	No
Official internal PSU rated power	155 W
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (15 kWh). Other official TEC values listed for this model include 18.
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Specs sources:

#14

HP Chromebox G4

Best for: Official TEC 18.9 kWh, official 32 GB memory

8.2/10

What we like

Official ENERGY STAR record lists a TEC of 18.9 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.8 W.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	18.9 kWh
Official sleep power	0.8 W
Official short-idle power	4.8 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,471,316
Official model name	HP Chromebox G4 ENERGY STAR
Official model number	G4
Official product type	Desktop
Official TEC	18.9 kWh
Official sleep mode power	0.8 W
Official short-idle power	4.8 W
Official long-idle power	3.2 W
Official off-mode power	0.2 W
Official system memory	32 GB
Official CPU cores	10
Official processor brand	Intel
Official processor name	Intel i7-1365U
Official CPU base clock	4.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-07-11T00:00:00.000
Official touch screen	No
Official external power supply rating	90 W
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Specs sources:

#15

Lenovo ThinkCentre neo 50q Gen 7

Best for: Official TEC 15.4 kWh, official 32 GB memory

8.2/10

What we like

Official ENERGY STAR record lists a TEC of 15.4 kWh.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	15.4 kWh
Official sleep power	1.3 W
Official short-idle power	3.3 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,661,414
Official model name	ThinkCentre neo 50q Gen 7
Official model number	13SS
Official product type	Desktop
Official TEC	15.4 kWh
Official sleep mode power	1.3 W
Official short-idle power	3.3 W
Official long-idle power	1.3 W
Official off-mode power	0.5 W
Official system memory	32 GB
Official CPU cores	6
Official processor brand	Intel
Official processor name	Core 7 350
Official CPU base clock	1.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-06-30T00:00:00.000
Official touch screen	No
Official external power supply rating	90 W
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Specs sources:

#16

Acer D24Q1 (CXM1)

Best for: Official TEC 13.9 kWh, official 16 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 13.9 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.6 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	13.9 kWh
Official sleep power	0.6 W
Official short-idle power	3.4 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,510,833
Official model name	D24Q1
Official model number	CXM1
Official product type	Desktop
Official TEC	13.9 kWh
Official sleep mode power	0.6 W
Official short-idle power	3.4 W
Official long-idle power	2.8 W
Official off-mode power	0.1 W
Official system memory	16 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	N5100
Official CPU base clock	1.1 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-10-08T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
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Specs sources:

#17

Acer D26U11

Best for: Official TEC 13.6 kWh, official 16 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 13.6 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.8 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	13.6 kWh
Official sleep power	0.8 W
Official short-idle power	3.1 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,713,434
Official model name	D26U11
Official model number	D26U11
Official product type	Desktop
Official TEC	13.6 kWh
Official sleep mode power	0.8 W
Official short-idle power	3.1 W
Official long-idle power	2.3 W
Official off-mode power	0.2 W
Official system memory	16 GB
Official CPU cores	6
Official processor brand	Intel
Official processor name	Intel(R) Core(TM) 7 350
Official CPU base clock	1.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-10-05T00:00:00.000
Official touch screen	No
Official external power supply rating	89.9 W
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Specs sources:

#18

Apple Mac mini (M4)

Best for: Official TEC 12 kWh, official 16 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 12 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.6 W.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	12 kWh
Official sleep power	0.6 W
Official short-idle power	2.8 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,513,878
Official model name	Mac mini (M4)
Official model number	A3238
Official product type	Desktop
Official TEC	12 kWh
Official sleep mode power	0.6 W
Official short-idle power	2.8 W
Official long-idle power	2.4 W
Official off-mode power	0.1 W
Official system memory	16 GB
Official CPU cores	10
Official processor brand	Apple
Official processor name	Apple M4
Official CPU base clock	3.9 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-10-16T00:00:00.000
Official touch screen	No
Official internal PSU rated power	155 W
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (12 kWh). Other official TEC values listed for this model include 14.3.
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Specs sources:

#19

Apple Mac mini (M6)

Best for: Official TEC 12.9 kWh, official 16 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 12.9 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.7 W.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	12.9 kWh
Official sleep power	0.7 W
Official short-idle power	2.9 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,693,494
Official model name	Mac mini (M6)
Official model number	A3534
Official product type	Desktop
Official TEC	12.9 kWh
Official sleep mode power	0.7 W
Official short-idle power	2.9 W
Official long-idle power	2.5 W
Official off-mode power	0.2 W
Official system memory	16 GB
Official CPU cores	12
Official processor brand	Apple
Official processor name	Apple M6
Official CPU base clock	4.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-08-17T00:00:00.000
Official touch screen	No
Official internal PSU rated power	155 W
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (12.9 kWh). Other official TEC values listed for this model include 15.6.
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Specs sources:

#20

ASUS CF40

Best for: Official TEC 9.5 kWh, official 16 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 9.5 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.5 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	9.5 kWh
Official sleep power	0.5 W
Official short-idle power	2.3 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,437,594
Official model name	CF40
Official model number	CF40
Official product type	Desktop
Official TEC	9.5 kWh
Official sleep mode power	0.5 W
Official short-idle power	2.3 W
Official long-idle power	1.8 W
Official off-mode power	0.1 W
Official system memory	16 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	Celeron
Official CPU base clock	1.1 GHz
Official storage technology	eMMC
Official ENERGY STAR date certified	2025-06-18T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
Price	Check price

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Specs sources:

#21

ASUS VM31

Best for: Official TEC 11.1 kWh, official 16 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 11.1 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.4 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	11.1 kWh
Official sleep power	0.4 W
Official short-idle power	3.4 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,586,771
Official model name	VM31
Official model number	VM31
Official product type	Desktop
Official TEC	11.1 kWh
Official sleep mode power	0.4 W
Official short-idle power	3.4 W
Official long-idle power	0.4 W
Official off-mode power	0.3 W
Official system memory	16 GB
Official CPU cores	4
Official processor brand	AMD
Official processor name	Ryzen 5
Official CPU base clock	2.8 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-02-12T00:00:00.000
Official touch screen	No
Official external power supply rating	90 W
Price	Check price

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Specs sources:

#22

HP Z2 Mini G9 Workstation Desktop PC

Best for: Official TEC 9.7 kWh, official 64 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 9.7 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	9.7 kWh
Official sleep power	1.1 W
Official short-idle power	18.8 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,470,546
Official model name	HP Z2 Mini G9 Workstation Desktop PC ENERGY STAR
Official model number	FCW-I001DM-180
Official product type	Workstation
Official TEC	9.7 kWh
Official sleep mode power	1.1 W
Official short-idle power	18.8 W
Official long-idle power	13.4 W
Official off-mode power	0.9 W
Official system memory	64 GB
Official CPU cores	16
Official processor brand	Intel
Official processor name	Core i9-12900K 16C 3.20G LGA 30 MB 125W (QY5U)
Official CPU base clock	3 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-07-07T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

#23

HP Z2 SFF G1i Workstation

Best for: Official TEC 8.8 kWh, official 192 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 8.8 kWh.
Official ENERGY STAR record lists 192 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	8.8 kWh
Official sleep power	5.8 W
Official short-idle power	15.7 W
Official system memory	192 GB
Official ENERGY STAR unique ID	4,046,717
Official model name	HP Z2 SFF G1i Workstation ENERGY STAR
Official model number	HP Z2 SFF G1i Workstation
Official product type	Workstation
Official TEC	8.8 kWh
Official sleep mode power	5.8 W
Official short-idle power	15.7 W
Official long-idle power	5.8 W
Official off-mode power	0.6 W
Official system memory	192 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	Core Ultra 9 285K
Official CPU base clock	3.7 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-05-19T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

#24

Lenovo ThinkStation P3 Tiny

Best for: Official TEC 11.3 kWh, official 64 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 11.3 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.8 W.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	11.3 kWh
Official sleep power	0.8 W
Official short-idle power	21.4 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,470,650
Official model name	ThinkStation P3 Tiny
Official model number	30H0
Official product type	Workstation
Official TEC	11.3 kWh
Official sleep mode power	0.8 W
Official short-idle power	21.4 W
Official long-idle power	17.2 W
Official off-mode power	0.5 W
Official system memory	64 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	i9-13900
Official CPU base clock	2 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-07-09T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

#25

Lenovo Yoga Mini 01IPH11

Best for: Official TEC 16.9 kWh, official 32 GB memory

8.1/10

What we like

Official ENERGY STAR record lists a TEC of 16.9 kWh.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	16.9 kWh
Official sleep power	1.4 W
Official short-idle power	3.7 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,529,098
Official model name	Yoga Mini 01IPH11
Official model number	91E6
Official product type	Desktop
Official TEC	16.9 kWh
Official sleep mode power	1.4 W
Official short-idle power	3.7 W
Official long-idle power	1.4 W
Official off-mode power	0.5 W
Official system memory	32 GB
Official CPU cores	16
Official processor brand	Intel
Official processor name	Core(TM) Ultra X7 358H
Official CPU base clock	1.9 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-02-02T00:00:00.000
Official touch screen	No
Official external power supply rating	100 W
Price	Check price

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Specs sources:

#26

Ace Computers Vision (VS-UDRB7X)

Best for: Official TEC 33.5 kWh, official 64 GB memory

8.0/10

What we like

Official ENERGY STAR record lists a TEC of 33.5 kWh.
Official ENERGY STAR record lists sleep-mode power of 1 W.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	33.5 kWh
Official sleep power	1 W
Official short-idle power	8.5 W
Official system memory	64 GB
Official ENERGY STAR unique ID	3,999,342
Official model name	Vision
Official model number	VS-UDRB7X
Official product type	Desktop
Official TEC	33.5 kWh
Official sleep mode power	1 W
Official short-idle power	8.5 W
Official long-idle power	7.3 W
Official off-mode power	1 W
Official system memory	64 GB
Official CPU cores	14
Official processor brand	Intel
Official processor name	Core i5
Official CPU base clock	3 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-03-05T00:00:00.000
Official touch screen	No
Official external power supply rating	120 W
Other official certified configurations	The ENERGY STAR record lists 3 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (33.5 kWh). Other official TEC values listed for this model include 40.4, 64.5.
Price	Check price

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Specs sources:

#27

AOPEN Chromebox Mini 2

Best for: Official TEC 15.5 kWh, official 8 GB memory

8.0/10

What we like

Official ENERGY STAR record lists a TEC of 15.5 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.6 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	15.5 kWh
Official sleep power	0.6 W
Official short-idle power	3.9 W
Official system memory	8 GB
Official ENERGY STAR unique ID	4,429,381
Official model name	AOPEN Chromebox Mini 2
Official model number	BC3115
Official product type	Desktop
Official TEC	15.5 kWh
Official sleep mode power	0.6 W
Official short-idle power	3.9 W
Official long-idle power	3.4 W
Official off-mode power	0.1 W
Official system memory	8 GB
Official CPU cores	2
Official processor brand	Intel
Official processor name	N4500
Official CPU base clock	1.1 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-06-03T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
Price	Check price

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Specs sources:

#28

HP Z2 Tower G9 Workstation Desktop PC

Best for: Official TEC 19.4 kWh, official 128 GB memory

8.0/10

What we like

Official ENERGY STAR record lists a TEC of 19.4 kWh.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	19.4 kWh
Official sleep power	2.6 W
Official short-idle power	34.2 W
Official system memory	128 GB
Official ENERGY STAR unique ID	4,439,134
Official model name	HP Z2 Tower G9 Workstation Desktop PC ENERGY STAR
Official model number	FCWF001MT-700
Official product type	Workstation
Official TEC	19.4 kWh
Official sleep mode power	2.6 W
Official short-idle power	34.2 W
Official long-idle power	32.8 W
Official off-mode power	0.7 W
Official system memory	128 GB
Official CPU cores	16
Official processor brand	Intel
Official processor name	i9-12900K
Official CPU base clock	3.2 GHz
Official storage technology	Hard Disk Drive
Official ENERGY STAR date certified	2025-06-20T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

#29

Lenovo Chromebox Micro

Best for: Official TEC 9.3 kWh, official 8 GB memory

8.0/10

What we like

Official ENERGY STAR record lists a TEC of 9.3 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.4 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	9.3 kWh
Official sleep power	0.4 W
Official short-idle power	2.3 W
Official system memory	8 GB
Official ENERGY STAR unique ID	4,310,432
Official model name	Lenovo Chromebox Micro
Official model number	83F9
Official product type	Desktop
Official TEC	9.3 kWh
Official sleep mode power	0.4 W
Official short-idle power	2.3 W
Official long-idle power	1.7 W
Official off-mode power	0.2 W
Official system memory	8 GB
Official CPU cores	2
Official processor brand	Intel
Official processor name	Celeron
Official CPU base clock	1.1 GHz
Official storage technology	eMMC
Official ENERGY STAR date certified	2025-05-21T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
Price	Check price

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Specs sources:

#30

Lenovo IdeaCentre Mini 01Q8X10

Best for: Official TEC 17.9 kWh, official 16 GB memory

8.0/10

What we like

Official ENERGY STAR record lists a TEC of 17.9 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.8 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	17.9 kWh
Official sleep power	0.8 W
Official short-idle power	3.3 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,012,665
Official model name	IdeaCentre Mini 01Q8X10
Official model number	91B6
Official product type	Desktop
Official TEC	17.9 kWh
Official sleep mode power	0.8 W
Official short-idle power	3.3 W
Official long-idle power	1.7 W
Official off-mode power	0.8 W
Official system memory	16 GB
Official CPU cores	10
Official processor brand	Qualcomm
Official processor name	Snapdragon X Plus - X1P64100
Official CPU base clock	3.4 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-04-10T00:00:00.000
Official touch screen	No
Official internal PSU rated power	150 W
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Specs sources:

#31

Lenovo V100q

Best for: Official TEC 17.1 kWh, official 16 GB memory

8.0/10

What we like

Official ENERGY STAR record lists a TEC of 17.1 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.8 W.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	17.1 kWh
Official sleep power	0.8 W
Official short-idle power	3.8 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,498,436
Official model name	Lenovo V100q
Official model number	13GG
Official product type	Thin Client
Official TEC	17.1 kWh
Official sleep mode power	0.8 W
Official short-idle power	3.8 W
Official long-idle power	2.3 W
Official off-mode power	0.5 W
Official system memory	16 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	N100
Official CPU base clock	0.8 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-09-08T00:00:00.000
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (17.1 kWh). Other official TEC values listed for this model include 21.1.
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Specs sources:

#32

Lenovo V105q

Best for: Official TEC 15 kWh, official 16 GB memory

8.0/10

What we like

Official ENERGY STAR record lists a TEC of 15 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.9 W.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	15 kWh
Official sleep power	0.9 W
Official short-idle power	3.8 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,520,738
Official model name	Lenovo V105q
Official model number	13Q4
Official product type	Thin Client
Official TEC	15 kWh
Official sleep mode power	0.9 W
Official short-idle power	3.8 W
Official long-idle power	0.9 W
Official off-mode power	0.4 W
Official system memory	16 GB
Official CPU cores	4
Official processor brand	AMD
Official processor name	Ryzen 5 40
Official CPU base clock	2.8 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2026-01-17T00:00:00.000
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (15 kWh). Other official TEC values listed for this model include 15.3.
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Specs sources:

#33

Acer D25Q1

Best for: Official TEC 15.1 kWh, official 16 GB memory

7.9/10

What we like

Official ENERGY STAR record lists a TEC of 15.1 kWh.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	15.1 kWh
Official sleep power	1.4 W
Official short-idle power	3.1 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,470,516
Official model name	D25Q1
Official model number	Acer Chromebox Mini CXM2
Official product type	Desktop
Official TEC	15.1 kWh
Official sleep mode power	1.4 W
Official short-idle power	3.1 W
Official long-idle power	1.4 W
Official off-mode power	0.1 W
Official system memory	16 GB
Official CPU cores	8
Official processor brand	Intel
Official processor name	Core 3
Official CPU base clock	2.9 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-07-07T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
Price	Check price

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Specs sources:

#34

ASUS NUC14MLK

Best for: Official TEC 15.3 kWh, official 16 GB memory

7.9/10

What we like

Official ENERGY STAR record lists a TEC of 15.3 kWh.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	15.3 kWh
Official sleep power	1.3 W
Official short-idle power	3.4 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,675,434
Official model name	NUC14MLK
Official model number	NUC14MLK
Official product type	Desktop
Official TEC	15.3 kWh
Official sleep mode power	1.3 W
Official short-idle power	3.4 W
Official long-idle power	1.3 W
Official off-mode power	0.3 W
Official system memory	16 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	N250
Official CPU base clock	1.3 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-07-24T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
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#35

Lenovo ThinkCentre neo 50q QC

Best for: Official TEC 14.7 kWh, official 16 GB memory

7.9/10

What we like

Official ENERGY STAR record lists a TEC of 14.7 kWh.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	14.7 kWh
Official sleep power	1.4 W
Official short-idle power	2.7 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,012,711
Official model name	ThinkCentre neo 50q QC
Official model number	13CA
Official product type	Desktop
Official TEC	14.7 kWh
Official sleep mode power	1.4 W
Official short-idle power	2.7 W
Official long-idle power	1.4 W
Official off-mode power	0.7 W
Official system memory	16 GB
Official CPU cores	8
Official processor brand	Qualcomm
Official processor name	Snapdragon X Plus - X1P42100
Official CPU base clock	3.4 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-04-11T00:00:00.000
Official touch screen	No
Official external power supply rating	90 W
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Specs sources:

#36

LG CQ6 (CQ6-)

Best for: Official TEC 19.9 kWh, official 16 GB memory

7.9/10

What we like

Official ENERGY STAR record lists a TEC of 19.9 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.6 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	19.9 kWh
Official sleep power	0.6 W
Official short-idle power	4.3 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,497,570
Official model name	CQ6***
Official model number	CQ6*-
Official product type	Thin Client
Official TEC	19.9 kWh
Official sleep mode power	0.6 W
Official short-idle power	4.3 W
Official long-idle power	4 W
Official off-mode power	0.3 W
Official system memory	16 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	N6005
Official CPU base clock	2 GHz
Official storage technology	M.2
Official ENERGY STAR date certified	2025-08-28T00:00:00.000
Official model number (as certified, including wildcards)	CQ6*-
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Specs sources:

#37

Microsoft Windows 365 Link

Best for: Official TEC 14.1 kWh, official 8 GB memory

7.9/10

What we like

Official ENERGY STAR record lists a TEC of 14.1 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.9 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	14.1 kWh
Official sleep power	0.9 W
Official short-idle power	3.6 W
Official system memory	8 GB
Official ENERGY STAR unique ID	4,012,655
Official model name	Windows 365 Link
Official model number	2104
Official product type	Desktop
Official TEC	14.1 kWh
Official sleep mode power	0.9 W
Official short-idle power	3.6 W
Official long-idle power	0.9 W
Official off-mode power	0.1 W
Official system memory	8 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	N250
Official CPU base clock	1.3 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-04-10T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
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Specs sources:

#38

Lenovo ThinkCentre M75s Gen 6

Best for: Official TEC 17.1 kWh, official 64 GB memory

7.8/10

What we like

Official ENERGY STAR record lists a TEC of 17.1 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	17.1 kWh
Official sleep power	3.1 W
Official short-idle power	11.9 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,670,234
Official model name	ThinkCentre M75s Gen 6
Official model number	13JB
Official product type	Desktop
Official TEC	17.1 kWh
Official sleep mode power	3.1 W
Official short-idle power	11.9 W
Official long-idle power	3.1 W
Official off-mode power	0.7 W
Official system memory	64 GB
Official CPU cores	8
Official processor brand	AMD
Official processor name	Ryzen 7
Official CPU base clock	4.2 GHz
Official storage technology	3.5 inch HDD,SSD
Official ENERGY STAR date certified	2026-07-15T00:00:00.000
Official touch screen	No
Official internal PSU rated power	400 W
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (17.1 kWh). Other official TEC values listed for this model include 50.5.
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Specs sources:

#39

MSI Cubi B206

Best for: Official TEC 20.4 kWh, official 32 GB memory

7.8/10

What we like

Official ENERGY STAR record lists a TEC of 20.4 kWh.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	20.4 kWh
Official sleep power	2 W
Official short-idle power	4 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,020,779
Official model name	Cubi B206
Official model number	Cubi NUC AI+ 2MG
Official product type	Desktop
Official TEC	20.4 kWh
Official sleep mode power	2 W
Official short-idle power	4 W
Official long-idle power	2 W
Official off-mode power	0.1 W
Official system memory	32 GB
Official CPU cores	8
Official processor brand	Intel
Official processor name	Core Ultra 7 258V
Official CPU base clock	2.2 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-05-08T00:00:00.000
Official touch screen	No
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Specs sources:

#40

Toshiba 4901-E17

Best for: Official TEC 33.9 kWh, official 64 GB memory

7.8/10

What we like

Official ENERGY STAR record lists a TEC of 33.9 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	33.9 kWh
Official sleep power	1.8 W
Official short-idle power	7.9 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,519,370
Official model name	4901-E17
Official model number	4901-E17
Official product type	Desktop
Official TEC	33.9 kWh
Official sleep mode power	1.8 W
Official short-idle power	7.9 W
Official long-idle power	5.9 W
Official off-mode power	0.7 W
Official system memory	64 GB
Official CPU cores	16
Official processor brand	Intel
Official processor name	Core i7-13700E
Official CPU base clock	1.8 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-12-19T00:00:00.000
Official touch screen	No
Official external power supply rating	250.1 W
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Specs sources:

#41

Intel NUC11ATK

Best for: Official TEC 20.3 kWh, official 4 GB memory

7.7/10

What we like

Official ENERGY STAR record lists a TEC of 20.3 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.6 W.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	20.3 kWh
Official sleep power	0.6 W
Official short-idle power	5.2 W
Official system memory	4 GB
Official ENERGY STAR unique ID	4,020,693
Official model name	NUC11ATK
Official model number	NUC11ATK
Official product type	Desktop
Official TEC	20.3 kWh
Official sleep mode power	0.6 W
Official short-idle power	5.2 W
Official long-idle power	4.4 W
Official off-mode power	0.2 W
Official system memory	4 GB
Official CPU cores	2
Official processor brand	Intel
Official processor name	Celeron N4505
Official CPU base clock	2 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-05-06T00:00:00.000
Official touch screen	No
Official external power supply rating	65 W
Price	Check price

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Specs sources:

#42

Dell D30M

Best for: Official TEC 16.7 kWh, official 128 GB memory

7.6/10

What we like

Official ENERGY STAR record lists a TEC of 16.7 kWh.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	16.7 kWh
Official sleep power	3.2 W
Official short-idle power	42.5 W
Official system memory	128 GB
Official ENERGY STAR unique ID	4,083,331
Official model name	D30M
Official model number	Precision 3680 Tower
Official product type	Workstation
Official TEC	16.7 kWh
Official sleep mode power	3.2 W
Official short-idle power	42.5 W
Official long-idle power	3.2 W
Official off-mode power	0.4 W
Official system memory	128 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	i9-14900K
Official CPU base clock	3.2 GHz
Official storage technology	Hard Disk Drive
Official ENERGY STAR date certified	2025-05-22T00:00:00.000
Official 'marketed as a workstation'	Yes
Other official certified configurations	The ENERGY STAR record lists 2 official certified configurations under this official model. This page uses the official configuration with the lowest official TEC (16.7 kWh). Other official TEC values listed for this model include 99.6.
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Specs sources:

#43

Dell D18U

Best for: Official TEC 7.6 kWh, official 64 GB memory

7.5/10

What we like

Official ENERGY STAR record lists a TEC of 7.6 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	7.6 kWh
Official sleep power	4.3 W
Official short-idle power	14.6 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,016,308
Official model name	D18U
Official model number	Precision 3280 CFF
Official product type	Workstation
Official TEC	7.6 kWh
Official sleep mode power	4.3 W
Official short-idle power	14.6 W
Official long-idle power	5.6 W
Official off-mode power	0.3 W
Official system memory	64 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	i9-14900
Official CPU base clock	2 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-04-24T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

#44

Dell D20U (FCM2250)

Best for: Official TEC 12.3 kWh, official 64 GB memory

7.5/10

What we like

Official ENERGY STAR record lists a TEC of 12.3 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	12.3 kWh
Official sleep power	3.3 W
Official short-idle power	20.9 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,016,329
Official model name	D20U
Official model number	FCM2250
Official product type	Workstation
Official TEC	12.3 kWh
Official sleep mode power	3.3 W
Official short-idle power	20.9 W
Official long-idle power	18.9 W
Official off-mode power	0.2 W
Official system memory	64 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	Ultra 9 285
Official CPU base clock	2.5 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2025-04-24T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

#45

MSI Cubi B213

Best for: Official TEC 25.6 kWh, official 16 GB memory

7.3/10

What we like

Official ENERGY STAR record lists a TEC of 25.6 kWh.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	25.6 kWh
Official sleep power	2.2 W
Official short-idle power	5.5 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,707,614
Official model name	Cubi B213
Official model number	Cubi NUC WCG
Official product type	Desktop
Official TEC	25.6 kWh
Official sleep mode power	2.2 W
Official short-idle power	5.5 W
Official long-idle power	2.2 W
Official off-mode power	0.4 W
Official system memory	16 GB
Official CPU cores	9
Official processor brand	Intel
Official processor name	Core 7 350
Official CPU base clock	1.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-09-22T00:00:00.000
Official touch screen	No
Official external power supply rating	120 W
Price	Check price

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Specs sources:

#46

Ace Computers VS-UDRX6X

Best for: Official TEC 36.6 kWh, official 32 GB memory

7.2/10

What we like

Official ENERGY STAR record lists a TEC of 36.6 kWh.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	36.6 kWh
Official sleep power	1.3 W
Official short-idle power	9.2 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,519,618
Official model name	VS-UDRX6X
Official model number	VS-UDRX6X
Official product type	Desktop
Official TEC	36.6 kWh
Official sleep mode power	1.3 W
Official short-idle power	9.2 W
Official long-idle power	7.4 W
Official off-mode power	0.7 W
Official system memory	32 GB
Official CPU cores	6
Official processor brand	AMD
Official processor name	Ryzen 7
Official CPU base clock	3.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-01-06T00:00:00.000
Official touch screen	No
Official internal PSU rated power	120 W
Price	Check price

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Specs sources:

#47

Intel NUC12WSH

Best for: Official TEC 27.6 kWh, official 16 GB memory

7.1/10

What we like

Official ENERGY STAR record lists a TEC of 27.6 kWh.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	27.6 kWh
Official sleep power	2.6 W
Official short-idle power	5.2 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,478,536
Official model name	NUC12WSH
Official model number	NUC12WSH
Official product type	Desktop
Official TEC	27.6 kWh
Official sleep mode power	2.6 W
Official short-idle power	5.2 W
Official long-idle power	2.6 W
Official off-mode power	1.1 W
Official system memory	16 GB
Official CPU cores	12
Official processor brand	Intel
Official processor name	Core i7
Official CPU base clock	2.5 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-07-16T00:00:00.000
Official touch screen	No
Official external power supply rating	120 W
Price	Check price

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Specs sources:

#48

MSI Cubi B032

Best for: Official TEC 27.3 kWh, official 16 GB memory

7.1/10

What we like

Official ENERGY STAR record lists a TEC of 27.3 kWh.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	27.3 kWh
Official sleep power	2.4 W
Official short-idle power	5.8 W
Official system memory	16 GB
Official ENERGY STAR unique ID	4,499,030
Official model name	Cubi B032
Official model number	Cubi Z AI 8M
Official product type	Desktop
Official TEC	27.3 kWh
Official sleep mode power	2.4 W
Official short-idle power	5.8 W
Official long-idle power	2.4 W
Official off-mode power	0.3 W
Official system memory	16 GB
Official CPU cores	8
Official processor brand	AMD
Official processor name	AMD Ryzen 9 8945HS w; AMD Radeon 780M
Official CPU base clock	4 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2025-08-25T00:00:00.000
Official touch screen	No
Official external power supply rating	120 W
Price	Check price

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Specs sources:

#49

HP Z2 Tower G1i Workstation

Best for: Official TEC 19.3 kWh, official 192 GB memory

6.5/10

What we like

Official ENERGY STAR record lists a TEC of 19.3 kWh.
Official ENERGY STAR record lists 192 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	19.3 kWh
Official sleep power	6.6 W
Official short-idle power	44.5 W
Official system memory	192 GB
Official ENERGY STAR unique ID	4,429,284
Official model name	HP Z2 Tower G1i Workstation ENERGY STAR
Official model number	HP Z2 Tower G1i Workstation
Official product type	Workstation
Official TEC	19.3 kWh
Official sleep mode power	6.6 W
Official short-idle power	44.5 W
Official long-idle power	6.6 W
Official off-mode power	0.7 W
Official system memory	192 GB
Official CPU cores	24
Official processor brand	Intel
Official processor name	Core Ultra 9 285K
Official CPU base clock	3.7 GHz
Official storage technology	Hard Disk Drive,Solid State Drive
Official ENERGY STAR date certified	2025-05-30T00:00:00.000
Official 'marketed as a workstation'	Yes
Price	Check price

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Specs sources:

#50

Atrust Thin Client

Best for: Official TEC 15.1 kWh, official 4 GB memory

5.5/10

What we like

Official ENERGY STAR record lists a TEC of 15.1 kWh.

Watch out for

Official sleep-mode power is Not listed on the ENERGY STAR record.

Score breakdown

Official TEC 35%

Official sleep power * 25%

Official short-idle power 20%

Official system memory 20%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

Official TEC	15.1 kWh
Official sleep power	Not listed
Official short-idle power	3.4 W
Official system memory	4 GB
Official ENERGY STAR unique ID	4,528,937
Official model name	Thin Client
Official model number	Atrust t76
Official product type	Thin Client
Official TEC	15.1 kWh
Official sleep mode power	Not listed
Official short-idle power	3.4 W
Official long-idle power	3.1 W
Official off-mode power	0.3 W
Official system memory	4 GB
Official CPU cores	4
Official processor brand	Intel
Official processor name	Atom x5-E8000
Official CPU base clock	1 GHz
Official storage technology	Solid State Drive
Official ENERGY STAR date certified	2026-01-22T00:00:00.000
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Specs sources:

#51

Toshiba 4901-91C

Best for: Official TEC 38.4 kWh, official 64 GB memory

5.4/10

What we like

Official ENERGY STAR record lists a TEC of 38.4 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official sleep-mode power is Not listed on the ENERGY STAR record.

Score breakdown

Official TEC 35%

Official sleep power * 25%

Official short-idle power 20%

Official system memory 20%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

Official TEC	38.4 kWh
Official sleep power	Not listed
Official short-idle power	9.1 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,573,290
Official model name	4901-91C
Official model number	4901-91C
Official product type	Desktop
Official TEC	38.4 kWh
Official sleep mode power	Not listed
Official short-idle power	9.1 W
Official long-idle power	7.6 W
Official off-mode power	0.7 W
Official system memory	64 GB
Official CPU cores	1
Official processor brand	Intel
Official processor name	Intel Core i7-13700E
Official CPU base clock	1.8 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-03-10T00:00:00.000
Official touch screen	No
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Specs sources:

#52

Toshiba 4901-92C

Best for: Official TEC 40.3 kWh, official 64 GB memory

5.3/10

What we like

Official ENERGY STAR record lists a TEC of 40.3 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official sleep-mode power is Not listed on the ENERGY STAR record.

Score breakdown

Official TEC 35%

Official sleep power * 25%

Official short-idle power 20%

Official system memory 20%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

Official TEC	40.3 kWh
Official sleep power	Not listed
Official short-idle power	9.7 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,586,612
Official model name	4901-92C
Official model number	4901-92C
Official product type	Desktop
Official TEC	40.3 kWh
Official sleep mode power	Not listed
Official short-idle power	9.7 W
Official long-idle power	8.8 W
Official off-mode power	0.7 W
Official system memory	64 GB
Official CPU cores	1
Official processor brand	Intel
Official processor name	Intel Core5 120HL
Official CPU base clock	1.8 GHz
Official storage technology	SSD
Official ENERGY STAR date certified	2026-04-13T00:00:00.000
Official touch screen	No
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Specs sources:

#53

Supermicro AS -3015A-I

Best for: Official TEC 52.8 kWh, official 128 GB memory

4.8/10

What we like

Official ENERGY STAR record lists a TEC of 52.8 kWh.
Official ENERGY STAR record lists 128 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	52.8 kWh
Official sleep power	7.7 W
Official short-idle power	91 W
Official system memory	128 GB
Official ENERGY STAR unique ID	4,056,700
Official model name	AS -3015A-I
Official model number	AS -3015A-I
Official product type	Workstation
Official TEC	52.8 kWh
Official sleep mode power	7.7 W
Official short-idle power	91 W
Official long-idle power	88.4 W
Official off-mode power	6 W
Official system memory	128 GB
Official CPU cores	16
Official processor brand	AMD
Official processor name	Ryzen 9 7950X
Official CPU base clock	3 GHz
Official storage technology	Solid State Drive,Hard Disk Drive
Official ENERGY STAR date certified	2025-05-22T00:00:00.000
Official 'marketed as a workstation'	Yes
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Specs sources:

#54

Supermicro SYS-551A-T

Best for: Official TEC 80.8 kWh, official 32 GB memory

3.1/10

What we like

Official ENERGY STAR record lists a TEC of 80.8 kWh.
Official ENERGY STAR record lists 32 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	80.8 kWh
Official sleep power	4.6 W
Official short-idle power	144.3 W
Official system memory	32 GB
Official ENERGY STAR unique ID	4,429,346
Official model name	SYS-551A-T
Official model number	SYS-551A-T
Official product type	Workstation
Official TEC	80.8 kWh
Official sleep mode power	4.6 W
Official short-idle power	144.3 W
Official long-idle power	141.2 W
Official off-mode power	5 W
Official system memory	32 GB
Official CPU cores	12
Official processor brand	Intel
Official processor name	Xeon® CPU W5-3425
Official CPU base clock	3 GHz
Official storage technology	Solid State Drive,Hard Disk Drive
Official ENERGY STAR date certified	2025-06-02T00:00:00.000
Official 'marketed as a workstation'	Yes
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Specs sources:

#55

Supermicro SYS-531A-I

Best for: Official TEC 79.3 kWh, official 64 GB memory

2.3/10

What we like

Official ENERGY STAR record lists a TEC of 79.3 kWh.
Official ENERGY STAR record lists 64 GB of system memory for this certified configuration.

Watch out for

Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.

Score breakdown

Official TEC 35%

Official sleep power 25%

Official short-idle power 20%

Official system memory 20%

Official TEC	79.3 kWh
Official sleep power	81.3 W
Official short-idle power	96.8 W
Official system memory	64 GB
Official ENERGY STAR unique ID	4,478,481
Official model name	SYS-531A-I
Official model number	SYS-531A-I
Official product type	Workstation
Official TEC	79.3 kWh
Official sleep mode power	81.3 W
Official short-idle power	96.8 W
Official long-idle power	82.3 W
Official off-mode power	4.5 W
Official system memory	64 GB
Official CPU cores	12
Official processor brand	Intel
Official processor name	Intel(R) Xeon(R) w5-2455x
Official CPU base clock	4.6 GHz
Official storage technology	Hard Disk Drive
Official ENERGY STAR date certified	2025-07-10T00:00:00.000
Official 'marketed as a workstation'	Yes
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Specs sources:

Buying guide: how to choose the right desktop PC

This table is for official desktop computers

Every product here has an official ENERGY STAR product type of Desktop, Thin Client or Workstation. Official notebooks and official integrated (all-in-one) desktops are ranked in their own tables. Official workstations are included because the official type is a desktop-class computer without an integrated display.

Official memory can be a maximum certified configuration

The official system memory figure is for the certified configuration on the ENERGY STAR record. Some official workstation records list hundreds or thousands of gigabytes. Those official figures are shown on the product page; the score clamps official memory at 128 GB so one extreme official configuration does not flatten the table.

What “Not listed” means

If official sleep power is missing from the ENERGY STAR record, the field is Not listed and scores at the category minimum. Official internal PSU wattage and official PSU efficiency, when published, are shown as extra details and are not scored.

Safety

How this ranking is calculated

Score = weighted average of normalised specs, out of 10. Full method

Official TECThe official Typical Energy Consumption (TEC) of the certified configuration, in kWh, published on the ENERGY STAR Computers V9.0 record. Lower official TEC is a lower certified annual-energy figure. It is a laboratory result for the configuration shown, not a utility bill we measured. Official values outside the reference range are clamped at the range ends for scoring only; the official figure is still shown. Scale: 120 → 15 kWh.

35%

Official sleep powerThe official Sleep Mode power published on the ENERGY STAR record, in watts. Lower official sleep power means less certified power while the computer is in sleep. If the field is blank it is shown as Not listed. Official values outside the reference range are clamped for scoring only; the official figure is still shown. Scale: 10 → 0.5 W.

25%

Official short-idle powerThe official Short Idle power published on the ENERGY STAR record, in watts. Lower official short-idle power means less certified power in that idle test state. Official values outside the reference range are clamped for scoring only; the official figure is still shown. Scale: 50 → 4 W.

20%

Official system memoryThe official system memory (RAM) published for the certified configuration on the ENERGY STAR record, in GB. A different official configuration of the same model can list a different official memory figure. Official values above the reference best are clamped at that best for scoring only; the official figure is still shown. Scale: 8 → 128 GB.

20%

Frequently asked questions

Do you test these computers in a lab?

No. Rankings use only figures published on the ENERGY STAR Certified Computers V9.0 record, each linked on the product page. We do not publish prices, customer ratings or hands-on performance test scores.

Why does a model show only one official memory or processor figure?

ENERGY STAR can certify more than one configuration of the same official model. When that happens we keep one page and score the official configuration with the lowest official TEC. Other official certified configurations, and their official TEC values, are listed as extra details. Confirm the installed processor, memory and storage with the maker and the retailer.

Are these all tower PCs?

Not necessarily. The official ENERGY STAR type is Desktop, Thin Client or Workstation. That official type does not always distinguish a tower from a small-form-factor or rack workstation. Confirm the chassis with the maker.

Do commissions change the ranking?

No. Amazon may pay a commission if you buy through a Check price button, at no extra cost to you. Commissions never change the order, and no brand can pay for placement.

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