Mini PC Power Consumption Test 2026 – Idle & CPU/GPU Power Draw Comparison
How energy efficient are modern mini PCs? In this power consumption test we compare the models U58, GH8, GH9 and H90Pro. We measure idle power draw as well as power consumption under CPU and GPU load.
Test Methodology
- Windows 11 Pro
- Balanced power profile
- NVMe SSD installed
- Measurement with watt meter
- 24h idle measurement
- Cinebench R24
- 3DMark Time Spy
- Dota 2 gaming load
Idle Power Draw
| Model | Average | Minimum | Maximum | 24h Consumption |
|---|---|---|---|---|
| U58 | 7.6W | 5.6W | 8W | 0.181 kWh |
| GH8 | 12.8W | 7.6W | 12.2W | 0.278 kWh |
| GH9 | 11W | 6.6W | 11.3W | 0.264kWh |
| H90Pro | 11W | 6.6W | 11.3W | 0.264 kWh |
During a continuous 24-hour idle test, the H90Pro consumed a total of 0.264 kWh. The average power draw was 11W with very stable power usage throughout the entire test period.
CPU and GPU Power Draw
| Model | Cinebench Multi | Dota 2 | 3DMark Time Spy |
|---|---|---|---|
| U58 | 36.2W(33–35W) | 36.6W(36–39W) | 30.5W(36–42W) |
| GH8 | 69W(75–91W) | 62W(73–89W) | 79W(73–88W) |
| GH9 | 67W(72–88W) | 58W(71–83W) | 50.4W(59–83W) |
| H90Pro | 57.7W (52–61W) | 67.7W (57–75W) | 77.5W (70–83W) |
Efficiency Comparison
For energy-efficient 24/7 operation, the U58 is particularly suitable. The H90Pro, on the other hand, offers higher performance with moderate power consumption under load.
Test Data Sources
The data in the tables above is based on the independent reviews linked below.
TechPowerUp's H90Pro Mini PC: ALLIWAVA H90Pro Review - Power & Noise Levels | TechPowerUp
TechPowerUp's U58 Mini PC: ALLIWAVA U58 Review - Power & Noise Levels | TechPowerUp
TechPowerUp's GH9 Mini PC: ALLIWAVA GH9 Review - Power & Noise Levels | TechPowerUp
PCWorld's GH8 Mini PC, Notebookcheck's GH8 Mini PC, and TechRadar's GH8 Mini PC
24/7 Operation Recommendation
Mini PC Power Consumption Comparison Keywords
- mini pc power consumption
- mini pc idle power usage
- mini pc energy efficiency
- low power mini pc 2026
- mini pc electricity cost 24/7
- mini pc vs desktop power consumption
- best low power mini pc
- mini pc watt usage comparison
- mini pc power draw under load
- energy efficient mini pc for server
Conclusion
The 2026 power consumption test shows that mini PCs are significantly more efficient than traditional desktop PCs. The U58 delivers the lowest idle power draw, while the H90Pro provides the highest performance under load.
