Transient Response
20% Load – 20ms
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.067V | 11.952V | 0.95% | Pass |
| 5V | 5.043V | 4.959V | 1.67% | Pass |
| 3.3V | 3.356V | 3.238V | 3.52% | Pass |
| 5VSB | 5.028V | 4.966V | 1.24% | Pass |
50% Load -20ms
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.043V | 11.971V | 0.60% | Pass |
| 5V | 5.039V | 4.952V | 1.72% | Pass |
| 3.3V | 3.352V | 3.229V | 3.68% | Pass |
| 5VSB | 5.015V | 4.960V | 1.10% | Pass |
The transient response is good on all rails, especially at 12V, where it matters the most.
Transient Response ATX v3.x Tests
The PSU passes all ATX v3.0 transient response tests. However, I don’t want to see below 3.2V at the 3.3V rail. CWT should beef up the respective VRM.
The 12V rail performs pretty well in the ATX v3.x transient response tests.
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fwiw I got some horrible coil whine with this PSU on low loads. Not sure if it was just my unit but had to return it as it was unbearable without headphones on windows’ power saver power plan, mostly disappeared on balanced if I wasn’t mostly idle