Load Testing
Test 1 (74.88W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 2.42A | 12.25V | 4.4mV |
| 5V | 5.06A | 5.06V | 10.0mV |
| 3.3V | 4.85A | 3.3V | 9.4mV |
| −12V | 0.1A | −11.73V | 12.6mV |
| 5Vsb | 0.5A | 4.97V | 5.4mV |
| AC Power | 83.55W | ||
| Efficiency | 89.62% | ||
| Power Factor | 0.82 | ||
| Intake Temp | 29°C | ||
| Exhaust Temp | 28°C (Fanless) | ||
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Test 2 (104.73W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 4.86A | 12.24V | 4.8mV |
| 5V | 5.06A | 5.06V | 10.4mV |
| 3.3V | 4.85A | 3.3V | 10.6mV |
| −12V | 0.1A | −11.73V | 11.8mV |
| 5Vsb | 0.5A | 4.97V | 5.6mV |
| AC Power | 114.49W | ||
| Efficiency | 91.48% | ||
| Power Factor | 0.89 | ||
| Intake Temp | 30°C | ||
| Exhaust Temp | 28°C (Fanless) | ||
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Test 3 (165.98W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 9.68A | 12.22V | 5.2mV |
| 5V | 5.06A | 5.06V | 11.6mV |
| 3.3V | 4.85A | 3.3V | 11.0mV |
| −12V | 0.1A | −11.86V | 12.0mV |
| 5Vsb | 0.99A | 4.95V | 6.2mV |
| AC Power | 178.28W | ||
| Efficiency | 93.10% | ||
| Power Factor | 0.95 | ||
| Intake Temp | 33°C | ||
| Exhaust Temp | 28°C (Fanless) | ||
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Test 4 (207.62W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 9.66A | 12.21V | 7.0mV |
| 5V | 10.08A | 5.04V | 14.2mV |
| 3.3V | 9.97A | 3.29V | 13.8mV |
| −12V | 0.1A | −11.95V | 11.8mV |
| 5Vsb | 0.99A | 4.94V | 8.4mV |
| AC Power | 219.8W | ||
| Efficiency | 94.46% | ||
| Power Factor | 0.97 | ||
| Intake Temp | 33°C | ||
| Exhaust Temp | 31°C (Fan intermittent) | ||
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Test 5 (265.05W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 14.39A | 12.2V | 8.8mV |
| 5V | 10.08A | 5.04V | 14.4mV |
| 3.3V | 9.94A | 3.38V | 14.4mV |
| −12V | 0.1A | −12.04V | 22.6mV |
| 5Vsb | 0.99A | 4.94V | 9.2mV |
| AC Power | 280.29W | ||
| Efficiency | 94.56% | ||
| Power Factor | 0.98 | ||
| Intake Temp | 33°C | ||
| Exhaust Temp | 31°C (Fan intermittent) | ||
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Test 6 (321.0W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 19.03A | 12.18V | 10.4mV |
| 5V | 10.06A | 5.03V | 16.0mV |
| 3.3V | 9.94A | 3.28V | 16.2mV |
| −12V | 0.1A | −12.15V | 27.4mV |
| 5Vsb | 0.99A | 4.94V | 10.4mV |
| AC Power | 340.07W | ||
| Efficiency | 94.39% | ||
| Power Factor | 0.98 | ||
| Intake Temp | 29°C | ||
| Exhaust Temp | 37°C (Fan intermittent) | ||
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Test 7 (376.31W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 23.61A | 12.16V | 12.2mV |
| 5V | 10.06A | 5.03V | 15.6mV |
| 3.3V | 9.94A | 3.28V | 16.6mV |
| −12V | 0.1A | −12.25V | 32.2mV |
| 5Vsb | 0.99A | 4.49V | 11.6mV |
| AC Power | 401.75W | ||
| Efficiency | 93.67% | ||
| Power Factor | 0.98 | ||
| Intake Temp | 28°C | ||
| Exhaust Temp | 37°C | ||
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Test 8 (403.99W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 26.46A | 12.16V | 13.2mV |
| 5V | 10.06A | 5.03V | 15.2mV |
| 3.3V | 9.94A | 3.28V | 16.8mV |
| −12V | 0.1A | −12.31V | 40.2mV |
| 5Vsb | 0.99A | 4.93V | 12.2mV |
| AC Power | 431.98W | ||
| Efficiency | 93.52% | ||
| Power Factor | 0.99 | ||
| Intake Temp | 28°C | ||
| Exhaust Temp | 37°C | ||
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Test 9 (461.91W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 30.45A | 12.14V | 15.6mV |
| 5V | 10.04A | 5.02V | 16.6mV |
| 3.3V | 9.91A | 3.27V | 18.6mV |
| −12V | 0.2A | −12.28V | 53.0mV |
| 5Vsb | 1.48A | 4.92V | 14.0mV |
| AC Power | 496.51W | ||
| Efficiency | 93.03% | ||
| Power Factor | 0.99 | ||
| Intake Temp | 29°C | ||
| Exhaust Temp | 37°C | ||
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Test 10 (494.55W Load)
| Rail | Load | Voltage | Ripple |
| 12V | 32.67A | 12.13V | 16.8mV |
| 5V | 10.04A | 5.02V | 16.4mV |
| 3.3V | 9.91A | 3.27V | 19.0mV |
| −12V | 0.31A | −12.22V | 60.8mV |
| 5Vsb | 2.456A | 4.91V | 14.2mV |
| AC Power | 531.28W | ||
| Efficiency | 93.09% | ||
| Power Factor | 0.99 | ||
| Intake Temp | 29°C | ||
| Exhaust Temp | 37°C | ||
.
The 12V rail started out at 12.25V and dropped to 12.13V at maximum load – this gives us worst-case voltage regulation of 0.25V, or 2.08%, and a drop of 0.12V or 1%. The 5V rail started at 5.06V and dropped to 5.02V, giving us worst-case regulation and variation numbers of 0.06V (1.2%) and 0.04V (0.8%) respectively. The 3.3V rail started off at 3.3V on the nose, and dropped to 3.27V, giving us 0.03V, 0r 0.91% regulation. Having variations of 1% and under across the board is an excellent result.
The efficiency was very high – staying above 90% for all but Test 1. It peaked at just a hair over 94.5% in Test 5 – about 2% higher than what 80 Plus got from it at a similar load. The fan first ran at about 200W load – but only for a few seconds before turning off again. It came on more often during subsequent tests and was on all the time in Test 7. Even with the power supply at full load, however, it was very quiet. The exhaust temperature was consistently 8°C higher than the intake.
One problem surfaced, however, during Test 10. Shortly after I was done collecting the data (about five minutes into the test), the power supply shut down, and wouldn’t power up again until it had cooled down slightly. When I attempted to overload the power supply, it would shut down much sooner – before I could finish reading the voltages and ripple. It seems that the fan controller needs some tweaking so that it will run the fan faster before the Over Temperature Protection trips. With that said, however, 80 Plus run power supplies for longer than I do and their unit obviously did not have this problem. It’s possible that this was a one-off defect. However, this unit was not supplied by Huntkey – we had to purchase it. I don’t give 2nd chances on such products.
| Rail | Test 9 (461.91W) | Test 10 (494.55W) |
| 12V |  |
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| 5V |  |
 |
| 3.3V |  |
 |
| −12V |  |
 |
| 5Vsb |  |
 |
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The ripple suppression was excellent, with the ripple on all rails staying well below half the maximum allowed at all times.
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