Transient Response
20% Load – 20ms
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.071V | 11.922V | 1.23% | Pass |
| 5V | 5.068V | 4.971V | 1.90% | Pass |
| 3.3V | 3.291V | 3.148V | 4.34% | Pass |
| 5VSB | 5.042V | 4.993V | 0.96% | Pass |
50% Load -20ms
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.049V | 11.905V | 1.20% | Pass |
| 5V | 5.057V | 4.957V | 1.98% | Pass |
| 3.3V | 3.279V | 3.128V | 4.61% | Fail |
| 5VSB | 5.017V | 4.964V | 1.05% | Pass |
The transient response is decent at 12V but needs improvement at 3.3V, where the unit doesn’t pass the second test since its voltage drops below 3.14V.
Transient Response ATX v3.x Tests
The PSU passes all ATX v3.0 transient response tests, but the 3.3V rail drops low in the 200% load test.
In these tests, the 12V rail drops low. The change in caps on the secondary side is the main culprit.
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