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HP ProOne 440 23.8 inch G9 All-in-One Desktop PC

Ranked #17 of 41 in Most energy-efficient all-in-one PCs, ranked on official ENERGY STAR power figures. Here is every spec we scored, where it came from, and how it compares.

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#17

HP ProOne 440 23.8 inch G9 All-in-One Desktop PC

Best for: Official TEC 55.6 kWh, official sleep 2.1 W

4.7/10

What we like

  • Official ENERGY STAR record lists a TEC of 55.6 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 45%
Official sleep power 30%
Official short-idle power 25%
Official TEC55.6 kWh
Official sleep power2.1 W
Official short-idle power16.8 W
Official ENERGY STAR unique ID4,481,490
Official model nameHP ProOne 440 23.8 inch G9 All-in-One Desktop PC (ENERGY STAR)
Official model numberHSC-I003-24
Official product typeIntegrated Desktop
Official TEC55.6 kWh
Official sleep mode power2.1 W
Official short-idle power16.8 W
Official long-idle power2.1 W
Official off-mode power1 W
Official system memory64 GB
Official CPU cores2
Official processor brandIntel
Official processor namePentium
Official CPU base clock3.7 GHz
Official storage technologySSD
Official ENERGY STAR date certified2025-08-21T00:00:00.000
Official integrated display size23.8 in
Official integrated display resolution2.07 MP
Official touch screenYes
Official external power supply rating230 W
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Specs sources:

How it compares

Open the full comparison table

HP 21.45 inch All-in-One Desktop PC 22-dg
7.6/10
#1 · Official TEC 34.9 kWh, official sleep 1.4 W
Lenovo ThinkCentre neo 55a 24 Gen 6
7.4/10
#2 · Official TEC 38.8 kWh, official sleep 0.9 W
Lenovo IdeaCentre AIO 24AKP10
6.7/10
#3 · Official TEC 44.3 kWh, official sleep 1 W
Lenovo IdeaCentre AIO 27AKP10
6.7/10
#4 · Official TEC 44.3 kWh, official sleep 0.8 W
HP OmniStudio 23.8 inch All-in-One Desktop PC 24-cv
6.1/10
#5 · Official TEC 44.1 kWh, official sleep 1.9 W
Apple iMac (M6, two ports)
5.9/10
#6 · Official TEC 53.5 kWh, official sleep 0.4 W
Lenovo ThinkCentre neo 50a 24 Gen 5
5.6/10
#7 · Official TEC 51.5 kWh, official sleep 1.5 W
Lenovo IdeaCentre AIO 27ILL11
5.5/10
#8 · Official TEC 49.1 kWh, official sleep 2.1 W
Lenovo ThinkCentre neo 50a 27 Gen 6 LNL
5.5/10
#9 · Official TEC 49.1 kWh, official sleep 2.1 W
Apple iMac (M4, two ports)
5.4/10
#10 · Official TEC 57.7 kWh, official sleep 0.6 W
HP OmniStudio 23.8 inch All-in-One Desktop PC 24-cu
5.4/10
#11 · Official TEC 48.9 kWh, official sleep 2.2 W
Apple iMac (M6, four ports)
5.3/10
#12 · Official TEC 57.4 kWh, official sleep 0.8 W
Lenovo ThinkCentre neo 50a 24 Gen 7
5.1/10
#13 · Official TEC 49.3 kWh, official sleep 2.7 W
Lenovo ThinkCentre neo 50a 27 Gen 7
5.0/10
#14 · Official TEC 49.9 kWh, official sleep 2.7 W
Lenovo ThinkCentre neo 50a 27 Gen 5
4.9/10
#15 · Official TEC 56.3 kWh, official sleep 1.6 W
Dell 24 All-in-One EC24260
4.8/10
#16 · Official TEC 52.3 kWh, official sleep 2.6 W
Lenovo Yoga AIO 27IPH11
4.6/10
#18 · Official TEC 56 kWh, official sleep 2.2 W
Apple iMac (M4, four ports)
4.5/10
#19 · Official TEC 63.6 kWh, official sleep 0.9 W
Lenovo IdeaCentre AIO 24ILL11
4.3/10
#20 · Official TEC 54 kWh, official sleep 3.1 W
Lenovo ThinkCentre neo 50a 24 Gen 6 LNL
4.3/10
#21 · Official TEC 54 kWh, official sleep 3.1 W
Lenovo IdeaCentre AIO 27IPH11
4.2/10
#22 · Official TEC 58.3 kWh, official sleep 2.4 W
HP OmniStudio 27 inch All-in-One Desktop PC 27-cu
4.0/10
#23 · Official TEC 59.6 kWh, official sleep 2.5 W
Lenovo ThinkCentre M90a Gen 5
3.9/10
#24 · Official TEC 62.1 kWh, official sleep 2.3 W
MSI PRO MAX 27TP Z 8MG
3.8/10
#25 · Official TEC 60.7 kWh, official sleep 2.5 W
Dell 27 All-in-One EC27260
3.7/10
#26 · Official TEC 60.1 kWh, official sleep 2.9 W
Lenovo ThinkCentre M70a Gen 6
3.0/10
#27 · Official TEC 63.3 kWh, official sleep 3.3 W
Lenovo ThinkCentre M90a Gen 6
2.9/10
#28 · Official TEC 77.5 kWh, official sleep 1.3 W
HP EliteOne 840 23.8 inch G9 All-in-One Desktop PC
2.7/10
#29 · Official TEC 63.5 kWh, official sleep 3.8 W
HP EliteStudio 8 All-in-One G1i 27 inch Desktop AI PC
2.5/10
#30 · Official TEC 72 kWh, official sleep 2.5 W
HP OmniStudio 27 inch All-in-One Desktop PC 27-cv
2.3/10
#31 · Official TEC 71 kWh, official sleep 3 W
Lenovo ThinkCentre M90a Pro Gen6
2.3/10
#32 · Official TEC 91.3 kWh, official sleep 1.3 W
HP ProStudio 4 All-in-One G1i 23.8 inch Desktop AI PC
2.2/10
#33 · Official TEC 67.6 kWh, official sleep 3.9 W
Lenovo ThinkCentre X AIO
1.8/10
#34 · Official TEC 81.4 kWh, official sleep 2.2 W
HP EliteOne 870 27 inch G9 All-in-One Desktop PC
1.7/10
#35 · Official TEC 77.2 kWh, official sleep 2.8 W
MSI Modern AM242TP 1M
1.7/10
#36 · Official TEC 68.7 kWh
MSI Modern AM272P 1M
1.7/10
#37 · Official TEC 68.7 kWh
HP OmniStudio X 31.5 inch All-in-One Desktop PC 32-c
1.6/10
#38 · Official TEC 81.1 kWh, official sleep 2.4 W
Lenovo Yoga AIO 32ILL10
1.6/10
#39 · Official TEC 90.3 kWh, official sleep 2.1 W
HP OmniStudio X 27 inch All-in-One Desktop PC 27-cs
1.4/10
#40 · Official TEC 81.6 kWh, official sleep 2.6 W
MSI Modern AM273Q AI 1UMG
0.0/10
#41 · Official TEC 92.4 kWh, official sleep 4 W