Load Testing
Test 1 (119.96W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 4.88A | 12.21V | 43.8mV |
| 5V | 5.11A | 5.11V | 15.0mV |
| 3.3V | 10.18A | 3.36V | 11.8mV |
| -12V | 0A | -11.91V | 14.8mV |
| 5Vsb | 0A | 5.05V | 19.8mV |
| AC Power | 145.23W | ||
| Efficiency | 82.60% | ||
| Power Factor | 0.62 | ||
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Test 2 (211.48W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 9.78A | 12.23V | 65.8mV |
| 5V | 10.16A | 5.08V | 22.6mV |
| 3.3V | 10.15A | 3.35V | 12.4mV |
| -12V | 0.1A | -12.03V | 34.2mV |
| 5Vsb | 1A | 5.0V | 31.2mV |
| AC Power | 249.26W | ||
| Efficiency | 84.85% | ||
| Power Factor | 0.6 | ||
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Test 3 (268.94W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 14.54A | 12.12V | 81.6mV |
| 5V | 10.22A | 5.11V | 26.8mV |
| 3.3V | 10.18A | 3.36V | 12.8mV |
| -12V | 0.1A | -12.17V | 39.2mV |
| 5Vsb | 1A | 5.0V | 32.2mV |
| AC Power | 314.15W | ||
| Efficiency | 85.61% | ||
| Power Factor | 0.6 | ||
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Test 4 (322.34W Load – Cold)
| Rail | Load | Voltage | Ripple |
| 12V | 19.15A | 11.97V | 96.0mV |
| 5V | 10.26A | 5.13V | 31.2mV |
| 3.3V | 10.18A | 3.36V | 13.2mV |
| -12V | 0.1A | -12.34V | 48.8mV |
| 5Vsb | 1A | 4.99V | 34.4mV |
| AC Power | 383.68W | ||
| Efficiency | 84.01% | ||
| Power Factor | 0.6 | ||
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The voltage regulation was OK, with the 12V rail peaking at 12.23V, which equates to 1.92% regulation. It dropped to 11.97V during Test 4, which equates to a drop of 0.26V, or 2.17%. The 5V rail managed 2.6% regulation, with a variation of 1%, while the 3.3V rail stayed at 3.36V throughout most of the testing, which gives us 1.81% regulation. While the voltages were always withing allowable limits, there is some room for improvement.
The efficiency was quite good for a lower end product, peaking at 85.61% during Test 3. The power factor wasn’t so crash hot, staying at 0.6 most of the time. This is because this power supply lacks Power Factor Correction (PFC). I did attempt to overload the power supply to around 430W , but it blew up after a few minutes, so it clearly lacks Over Power Protection (OPP)
| Rail | Test 3 (268.94W) | Test 4 (322.34W) |
| 12V |  |
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| 5V |  |
 |
| 3.3V |  |
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| -12V |
 |
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| 5Vsb |  |
 |
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The ripple suppression was acceptable, but there is room for improvement here also. The ripple was rather high, especially on the 12V rail. I prefer to see it stay below half the maximum allowed, which only happened on the -12V and 3.3V rails.
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