Load Testing
Test 1 (116.56W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 4.84A | 12.1V | 13.2mV |
| 5V | 4.98A | 4.98V | 8.2mV |
| 3.3V | 10.03A | 3.31V | 8.6mV |
| -12V | 0A | -12.17V | 9.0mV |
| 5Vsb | 0A | 5.03V | 20.6mV |
| AC Power | 125.76W | ||
| Efficiency | 92.96% | ||
| Power Factor | 0.93 | ||
Test 2 (205.93W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 9.7A | 12.13V | 18.0mV |
| 5V | 9.9A | 4.95V | 9.8mV |
| 3.3V | 10.0A | 3.3V | 8.2mV |
| -12V | 0.1A | -12.09V | 23.8mV |
| 5Vsb | 1A | 5.0V | 9.2mV |
| AC Power | 223.82W | ||
| Efficiency | 92.01% | ||
| Power Factor | 0.94 | ||
Test 3 (264.03W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 14.51A | 12.09V | 22.0mV |
| 5V | 9.94A | 4.97V | 11.2mV |
| 3.3V | 10.0A | 3.3V | 8.8mV |
| -12V | 0.1A | -12.12V | 29.0mV |
| 5Vsb | 1A | 5.0V | 10.4mV |
| AC Power | 283.66W | ||
| Efficiency | 93.08% | ||
| Power Factor | 0.96 | ||
Test 4 (320.97W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 19.26A | 12.04V | 26.6mV |
| 5V | 9.98A | 4.99V | 13.2mV |
| 3.3V | 10.0A | 3.3V | 9.0mV |
| -12V | 0.1A | -12.14V | 34.0mV |
| 5Vsb | 1A | 5.0V | 12.0mV |
| AC Power | 347.32W | ||
| Efficiency | 92.41% | ||
| Power Factor | 0.96 | ||
Test 5 (376.48W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 23.96A | 11.98V | 28.0mV |
| 5V | 10.02A | 5.01V | 14.8mV |
| 3.3V | 10.0A | 3.3V | 9.0mV |
| -12V | 0.1A | -12.17V | 39.8mV |
| 5Vsb | 1.0A | 5.0V | 13.8mV |
| AC Power | 408.4W | ||
| Efficiency | 92.18% | ||
| Power Factor | 0.97 | ||
Test 6 (404.11W Load – Warm)
| Rail | Load | Voltage | Ripple |
| 12V | 26.31A | 11.96V | 32.6mV |
| 5V | 10.02A | 5.01V | 15.0mV |
| 3.3V | 10.0A | 3.3V | 9.2mV |
| -12V | 0.1A | -12.18V | 42.0mV |
| 5Vsb | 1A | 4.99V | 15.4mV |
| AC Power | 441.87W | ||
| Efficiency | 91.45% | ||
| Power Factor | 0.97 | ||
Overload Test (485.22W Load – Warm)
| Rail | Load | Voltage | Ripple |
| 12V | 33.26A | 11.88V | 40.0mV |
| 5V | 10.08A | 5.04V | 18.6mV |
| 3.3V | 10.0A | 3.3V | 9.8mV |
| -12V | 0.1A | -12.21V | 50.6mV |
| 5Vsb | 1A | 5.0V | 18.0mV |
| AC Power | 537.66W | ||
| Efficiency | 90.25% | ||
| Power Factor | 0.98 | ||
Wow. Just look at those efficiency numbers! Never does it drop below 90%. Admittedly, though, it was a cold day, so things didn’t warm up as much as I was hoping, but it’s impressive nonetheless.
The maximum deviation on the 12V rail was 0.13V, or 1.08%, during Test 2. I dropped to 11.96V at full load, which equates to a 1.42% drop. On the 5V rail was off by 0.05V, or 1% during test 1, and it went up to 5.01V during test 6. That gives us a 1.2% variation. The 3.3V rail was at 3.31V during test 1 and right on 3.3V throughout the other tests. That gives us 0.3% regulation there. That’s an excellent result on all of the rails.
Like the IP-S400CQ2-0, I overloaded it to just over 480W without incident. Everything was still in spec, but there was a drop in the efficiency.
| Rail | Test 6 (404.11W) | Overload Test (485.22W) |
| 12V |  |
 |
| 5V |  |
 |
| 3.3V |  |
 |
| -12V |  |
 |
| 5Vsb |  |
 |
The ripple is slightly higher than it was on the CQ2-0, but it’s still very good, and never even gets to half of the maximum allowed on any of the rails, even during the overload test.
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