Apple iMac (M4, four ports) vs HP EliteOne 840 23.8 inch G9 All-in-One Desktop PC
Official ENERGY STAR certified computers from HP and Apple, ranked in this category.
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Best for: Official TEC 63.6 kWh, official sleep 0.9 W
Check price at AmazonBest for: Official TEC 63.5 kWh, official sleep 3.8 W
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | Apple iMac (M4, four ports) | HP EliteOne 840 23.8 inch G9 All-in-One Desktop PC | Weight |
|---|---|---|---|
| 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. | 63.6 kWh | 63.5 kWh | 45% |
| 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. | 0.9 W | 3.8 W | 30% |
| 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. | 22 W | 16.8 W | 25% |
| Official ENERGY STAR unique ID | 4,513,882 | 4,510,378 | info |
| Official model name | iMac (M4, four ports) | HP EliteOne 840 23.8 inch G9 All-in-One Desktop PC (ENERGY STAR) | info |
| Official model number | A3137 | HSC-Q002-24 | info |
| Official product type | Integrated Desktop | Integrated Desktop | info |
| Official TEC | 63.6 kWh | 63.5 kWh | info |
| Official sleep mode power | 0.9 W | 3.8 W | info |
| Official short-idle power | 22 W | 16.8 W | info |
| Official long-idle power | 2.3 W | 3.8 W | info |
| Official off-mode power | 0.3 W | 1 W | info |
| Official system memory | 16 GB | 64 GB | info |
| Official CPU cores | 10 | 24 | info |
| Official processor brand | Apple | Intel | info |
| Official processor name | Apple M4 | Core i9 | info |
| Official CPU base clock | 3.9 GHz | 2 GHz | info |
| Official storage technology | SSD | SSD | info |
| Official ENERGY STAR date certified | 2025-10-16T00:00:00.000 | 2025-09-26T00:00:00.000 | info |
| Official integrated display size | 23.5 in | 23.8 in | info |
| Official integrated display resolution | 11.29 MP | 2.07 MP | info |
| Official touch screen | No | No | info |
| Official external power supply rating | 143 W | Not listed | info |
| 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 (63.6 kWh). Other official TEC values listed for this model include 63.6. | Not listed | info |
| Official internal PSU rated power | Not listed | 240 W | info |
| BytePick score | 4.5/10 | 2.7/10 | 100% |
Where each one comes out ahead
Apple iMac (M4, four ports)
Better published figure on: Official sleep power.
What we like
- Official ENERGY STAR record lists a TEC of 63.6 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.
HP EliteOne 840 23.8 inch G9 All-in-One Desktop PC
Better published figure on: Official TEC, Official short-idle power.
What we like
- Official ENERGY STAR record lists a TEC of 63.5 kWh.
Watch out for
- Official TEC is a certified laboratory annual-energy figure for this configuration, not a utility bill we measured.
Verdict
Official ENERGY STAR TEC is 63.5 kWh vs 63.6 kWh; compare official sleep power and official short-idle power. Official processor and official memory are shown as certified facts, not scored.
- Apple iMac (M4, four ports): ENERGY STAR Certified Computers V9.0 (pd_id 4513882)
- Apple iMac (M4, four ports): ENERGY STAR Product Finder (computers)
- HP EliteOne 840 23.8 inch G9 All-in-One Desktop PC: ENERGY STAR Certified Computers V9.0 (pd_id 4510378)
- HP EliteOne 840 23.8 inch G9 All-in-One Desktop PC: ENERGY STAR Product Finder (computers)
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