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Best all-in-one PCs, ranked on official ENERGY STAR specs
Official ENERGY STAR certified integrated desktop computers (all-in-one PCs), 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 integrated display size, when published, is shown as an extra detail and is not scored. Missing official fields are shown as Not listed and score at the category minimum.
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Top pick
T
Toshiba TCx 820 (6225-367)
Score 8.3/10 · Check price
Why it wins: Official TEC 33 kWh, official 64 GB memory. Official ENERGY STAR record lists a TEC of 33 kWh.. Official ENERGY STAR record lists 64 GB of system memory for this certified configuration..
"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.
Best for: Official TEC 33 kWh, official 64 GB memory
8.3/10
What we like
Official ENERGY STAR record lists a TEC of 33 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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
33 kWh
Official sleep power
1.6 W
Official short-idle power
8.3 W
Official system memory
64 GB
Official ENERGY STAR unique ID
4,480,588
Official model name
TCx 820
Official model number
6225-367
Official product type
Integrated Desktop
Official TEC
33 kWh
Official sleep mode power
1.6 W
Official short-idle power
8.3 W
Official long-idle power
3.9 W
Official off-mode power
1.1 W
Official system memory
64 GB
Official CPU cores
10
Official processor brand
Intel
Official processor name
Core 7 160UL
Official CPU base clock
1.8 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-07-28T00:00:00.000
Official integrated display size
15.6 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
Official external power supply rating
100 W
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 (33 kWh). Other official TEC values listed for this model include 33.5, 42.9, 43, 43.4, 45.8, 56.8, 59.3.
Best for: Official TEC 38.8 kWh, official 32 GB memory
6.8/10
What we like
Official ENERGY STAR record lists a TEC of 38.8 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.9 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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
38.8 kWh
Official sleep power
0.9 W
Official short-idle power
13 W
Official system memory
32 GB
Official ENERGY STAR unique ID
4,020,861
Official model name
ThinkCentre neo 55a 24 Gen 6
Official model number
13FA
Official product type
Integrated Desktop
Official TEC
38.8 kWh
Official sleep mode power
0.9 W
Official short-idle power
13 W
Official long-idle power
0.9 W
Official off-mode power
0.4 W
Official system memory
32 GB
Official CPU cores
4
Official processor brand
AMD
Official processor name
Ryzen 3
Official CPU base clock
3 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-05-08T00:00:00.000
Official integrated display size
23.8 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
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 (38.8 kWh). Other official TEC values listed for this model include 47.3.
Best for: Official TEC 37.1 kWh, official 32 GB memory
6.7/10
What we like
Official ENERGY STAR record lists a TEC of 37.1 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
37.1 kWh
Official sleep power
1.4 W
Official short-idle power
11.5 W
Official system memory
32 GB
Official ENERGY STAR unique ID
4,478,556
Official model name
P440VA
Official model number
P440VA
Official product type
Integrated Desktop
Official TEC
37.1 kWh
Official sleep mode power
1.4 W
Official short-idle power
11.5 W
Official long-idle power
1.4 W
Official off-mode power
0.2 W
Official system memory
32 GB
Official CPU cores
14
Official processor brand
Intel
Official processor name
Core 7
Official CPU base clock
2.5 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-07-16T00:00:00.000
Official integrated display size
24 in
Official integrated display resolution
2.07 MP
Official touch screen
No
Official external power supply rating
120 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 (37.1 kWh). Other official TEC values listed for this model include 39.6.
Best for: Official TEC 48.9 kWh, official 64 GB memory
6.3/10
What we like
Official ENERGY STAR record lists a TEC of 48.9 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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
48.9 kWh
Official sleep power
2.2 W
Official short-idle power
14.6 W
Official system memory
64 GB
Official ENERGY STAR unique ID
4,515,173
Official model name
HP OmniStudio 23.8 inch All-in-One DesktopPC 24-cu ENERGY STAR
Official model number
24-cu
Official product type
Integrated Desktop
Official TEC
48.9 kWh
Official sleep mode power
2.2 W
Official short-idle power
14.6 W
Official long-idle power
2.2 W
Official off-mode power
0.1 W
Official system memory
64 GB
Official CPU cores
10
Official processor brand
Intel
Official processor name
Core i5
Official CPU base clock
1.4 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-11-17T00:00:00.000
Official integrated display size
23.8 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
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 (48.9 kWh). Other official TEC values listed for this model include 70.
Best for: Official TEC 44.3 kWh, official 32 GB memory
6.3/10
What we like
Official ENERGY STAR record lists a TEC of 44.3 kWh.
Official ENERGY STAR record lists sleep-mode power of 1 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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
44.3 kWh
Official sleep power
1 W
Official short-idle power
14.7 W
Official system memory
32 GB
Official ENERGY STAR unique ID
4,020,854
Official model name
IdeaCentre AIO 24AKP10
Official model number
F0JC
Official product type
Integrated Desktop
Official TEC
44.3 kWh
Official sleep mode power
1 W
Official short-idle power
14.7 W
Official long-idle power
1 W
Official off-mode power
0.5 W
Official system memory
32 GB
Official CPU cores
4
Official processor brand
AMD
Official processor name
Ryzen 3
Official CPU base clock
3 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-05-08T00:00:00.000
Official integrated display size
23.8 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
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 (44.3 kWh). Other official TEC values listed for this model include 49.4.
Best for: Official TEC 28.3 kWh, official 4 GB memory
6.2/10
What we like
Official ENERGY STAR record lists a TEC of 28.3 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
28.3 kWh
Official sleep power
2.4 W
Official short-idle power
6.3 W
Official system memory
4 GB
Official ENERGY STAR unique ID
4,471,328
Official model name
ESY15I1E
Official model number
ESY15I1-2UWE-0-4G-6E-A14-AOSP-BK-NS
Official product type
Integrated Desktop
Official TEC
28.3 kWh
Official sleep mode power
2.4 W
Official short-idle power
6.3 W
Official long-idle power
2.4 W
Official off-mode power
0.1 W
Official system memory
4 GB
Official CPU cores
8
Official processor brand
Qualcomm
Official processor name
QCS6490
Official CPU base clock
2.7 GHz
Official storage technology
UFS
Official ENERGY STAR date certified
2025-06-24T00:00:00.000
Official integrated display size
15.6 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
Official internal PSU rated power
0 W
Official external power supply rating
65 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 (28.3 kWh). Other official TEC values listed for this model include 34.
Best for: Official TEC 44.3 kWh, official 32 GB memory
6.2/10
What we like
Official ENERGY STAR record lists a TEC of 44.3 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 ratings are for the certified configuration shown; other official configurations of this model can list different TEC, memory or processor figures.
Score breakdown
Official TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
44.3 kWh
Official sleep power
0.8 W
Official short-idle power
16.4 W
Official system memory
32 GB
Official ENERGY STAR unique ID
4,020,857
Official model name
IdeaCentre AIO 27AKP10
Official model number
F0JE
Official product type
Integrated Desktop
Official TEC
44.3 kWh
Official sleep mode power
0.8 W
Official short-idle power
16.4 W
Official long-idle power
0.8 W
Official off-mode power
0.5 W
Official system memory
32 GB
Official CPU cores
4
Official processor brand
AMD
Official processor name
Ryzen 3
Official CPU base clock
3 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-05-08T00:00:00.000
Official integrated display size
27 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
Official external power supply rating
90 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 (44.3 kWh). Other official TEC values listed for this model include 52.6.
Best for: Official TEC 32.1 kWh, official 4 GB memory
5.6/10
What we like
Official ENERGY STAR record lists a TEC of 32.1 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
32.1 kWh
Official sleep power
2.9 W
Official short-idle power
6.6 W
Official system memory
4 GB
Official ENERGY STAR unique ID
4,576,896
Official model name
ESY15I1E-C
Official model number
ESY15I1-2UWE-0-4G-6E-A14-AOSP-GY-NS
Official product type
Integrated Desktop
Official TEC
32.1 kWh
Official sleep mode power
2.9 W
Official short-idle power
6.6 W
Official long-idle power
2.9 W
Official off-mode power
0.4 W
Official system memory
4 GB
Official CPU cores
8
Official processor brand
Qualcomm
Official processor name
Qualcomm QCS6490
Official CPU base clock
2.7 GHz
Official storage technology
NAND flash memory
Official ENERGY STAR date certified
2026-03-18T00:00:00.000
Official integrated display size
15.6 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
Official internal PSU rated power
0 W
Official external power supply rating
65 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 (32.1 kWh). Other official TEC values listed for this model include 46.2, 65.4.
Best for: Official TEC 47.6 kWh, official 32 GB memory
5.5/10
What we like
Official ENERGY STAR record lists a TEC of 47.6 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
47.6 kWh
Official sleep power
1.9 W
Official short-idle power
14.6 W
Official system memory
32 GB
Official ENERGY STAR unique ID
4,497,643
Official model name
PM640KA
Official model number
PM640KA
Official product type
Integrated Desktop
Official TEC
47.6 kWh
Official sleep mode power
1.9 W
Official short-idle power
14.6 W
Official long-idle power
1.9 W
Official off-mode power
0.2 W
Official system memory
32 GB
Official CPU cores
8
Official processor brand
AMD
Official processor name
Ryzen AI 7
Official CPU base clock
2 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-08-29T00:00:00.000
Official integrated display size
24 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
Official external power supply rating
120 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 (47.6 kWh). Other official TEC values listed for this model include 47.6.
Best for: Official TEC 45.3 kWh, official 16 GB memory
5.4/10
What we like
Official ENERGY STAR record lists a TEC of 45.3 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
45.3 kWh
Official sleep power
1.4 W
Official short-idle power
14.6 W
Official system memory
16 GB
Official ENERGY STAR unique ID
4,478,587
Official model name
P470VA
Official model number
P470VA
Official product type
Integrated Desktop
Official TEC
45.3 kWh
Official sleep mode power
1.4 W
Official short-idle power
14.6 W
Official long-idle power
1.4 W
Official off-mode power
0.2 W
Official system memory
16 GB
Official CPU cores
6
Official processor brand
Intel
Official processor name
Core i3
Official CPU base clock
1.2 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2025-07-17T00:00:00.000
Official integrated display size
27 in
Official integrated display resolution
2.07 MP
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 (45.3 kWh). Other official TEC values listed for this model include 48.3.
Best for: Official TEC 53.5 kWh, official 16 GB memory
5.1/10
What we like
Official ENERGY STAR record lists a TEC of 53.5 kWh.
Official ENERGY STAR record lists sleep-mode power of 0.4 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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
53.5 kWh
Official sleep power
0.4 W
Official short-idle power
19.3 W
Official system memory
16 GB
Official ENERGY STAR unique ID
4,723,575
Official model name
iMac (M6, two ports)
Official model number
A3589
Official product type
Integrated Desktop
Official TEC
53.5 kWh
Official sleep mode power
0.4 W
Official short-idle power
19.3 W
Official long-idle power
1 W
Official off-mode power
0.3 W
Official system memory
16 GB
Official CPU cores
10
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
2026-10-14T00:00:00.000
Official integrated display size
23.5 in
Official integrated display resolution
11.29 MP
Official touch screen
No
Official external power supply rating
143 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 (53.5 kWh). Other official TEC values listed for this model include 59.9.
Best for: Official TEC 39.3 kWh, official 8 GB memory
4.8/10
What we like
Official ENERGY STAR record lists a TEC of 39.3 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
39.3 kWh
Official sleep power
3.1 W
Official short-idle power
9.2 W
Official system memory
8 GB
Official ENERGY STAR unique ID
4,695,334
Official model name
HP Engage One Pro 15.6 G2 AiO System (ENERGY STAR)
Official model number
HSC-I014R15
Official product type
Integrated Desktop
Official TEC
39.3 kWh
Official sleep mode power
3.1 W
Official short-idle power
9.2 W
Official long-idle power
3.1 W
Official off-mode power
0.3 W
Official system memory
8 GB
Official CPU cores
8
Official processor brand
Qualcomm
Official processor name
QCS6690
Official CPU base clock
2.9 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2026-08-31T00:00:00.000
Official integrated display size
15.6 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
Official external power supply rating
150 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 (39.3 kWh). Other official TEC values listed for this model include 40.
Best for: Official TEC 44.1 kWh, official 4 GB memory
4.7/10
What we like
Official ENERGY STAR record lists a TEC of 44.1 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
44.1 kWh
Official sleep power
2.4 W
Official short-idle power
12.3 W
Official system memory
4 GB
Official ENERGY STAR unique ID
4,471,329
Official model name
ESY22I1E
Official model number
ESY22I1-2UWE-0-4G-6E-A14-AOSP-BK-NS
Official product type
Integrated Desktop
Official TEC
44.1 kWh
Official sleep mode power
2.4 W
Official short-idle power
12.3 W
Official long-idle power
2.4 W
Official off-mode power
0.1 W
Official system memory
4 GB
Official CPU cores
8
Official processor brand
Qualcomm
Official processor name
QCS6490
Official CPU base clock
2.7 GHz
Official storage technology
UFS
Official ENERGY STAR date certified
2025-06-25T00:00:00.000
Official integrated display size
21.6 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
Official internal PSU rated power
0 W
Official external power supply rating
65 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 (44.1 kWh). Other official TEC values listed for this model include 48.
Best for: Official TEC 49.1 kWh, official 16 GB memory
4.7/10
What we like
Official ENERGY STAR record lists a TEC of 49.1 kWh.
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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
49.1 kWh
Official sleep power
2.1 W
Official short-idle power
14.6 W
Official system memory
16 GB
Official ENERGY STAR unique ID
4,528,806
Official model name
IdeaCentre AIO 27ILL11
Official model number
F0JV
Official product type
Integrated Desktop
Official TEC
49.1 kWh
Official sleep mode power
2.1 W
Official short-idle power
14.6 W
Official long-idle power
2.1 W
Official off-mode power
0.5 W
Official system memory
16 GB
Official CPU cores
8
Official processor brand
Intel
Official processor name
Core Ultra 7
Official CPU base clock
2.2 GHz
Official storage technology
SSD
Official ENERGY STAR date certified
2026-01-26T00:00:00.000
Official integrated display size
27 in
Official integrated display resolution
2.07 MP
Official touch screen
Yes
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 (49.1 kWh). Other official TEC values listed for this model include 57.6.
Best for: Official TEC 57.7 kWh, official 16 GB memory
4.6/10
What we like
Official ENERGY STAR record lists a TEC of 57.7 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 TEC35%
Official sleep power25%
Official short-idle power20%
Official system memory20%
Official TEC
57.7 kWh
Official sleep power
0.6 W
Official short-idle power
20.6 W
Official system memory
16 GB
Official ENERGY STAR unique ID
4,515,607
Official model name
iMac (M4, two ports)
Official model number
A3247
Official product type
Integrated Desktop
Official TEC
57.7 kWh
Official sleep mode power
0.6 W
Official short-idle power
20.6 W
Official long-idle power
1.2 W
Official off-mode power
0.3 W
Official system memory
16 GB
Official CPU cores
8
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 integrated display size
23.5 in
Official integrated display resolution
11.29 MP
Official touch screen
No
Official external power supply rating
143 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 (57.7 kWh). Other official TEC values listed for this model include 60.7.
Buying guide: how to choose the right all-in-one PC
This table is for official integrated desktops
Every product here has an official ENERGY STAR product type of Integrated Desktop or Integrated Thin Client. These official types are all-in-one computers with an integrated display. Official notebooks and official separate-display desktops are ranked in their own tables.
Official display size is shown, not scored
The official integrated display diagonal, when published, is listed as an extra detail. A larger official display is not automatically a better official energy result, so display size is not a scored field. Official TEC, official sleep power, official short-idle power and official system memory are the scored fields.
What “Not listed” means
If official sleep power or official display size is missing from the ENERGY STAR record, that field is Not listed. Missing scored fields score at the category minimum. Official resolution and official touch-screen listings, when published, are extra details.
Safety
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.
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: 85 → 20 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: 4 → 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: 25 → 6 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 → 64 GB.
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.
Why not score official display size?
Official display size is a published figure buyers care about, but a larger official screen is not inherently better in an energy-certified ranking. We show the official diagonal when the record lists it, and we score official TEC and official power figures instead.
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.