Transient Response
20% Load – 20ms
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.066V | 11.779V | 2.38% | Pass |
| 5V | 5.090V | 4.765V | 6.39% | Pass |
| 3.3V | 3.306V | 3.059V | 7.48% | Fail |
| 5VSB | 5.003V | 4.829V | 3.47% | Pass |
50% Load -20ms
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.041V | 11.769V | 2.26% | Pass |
| 5V | 5.083V | 4.772V | 6.12% | Pass |
| 3.3V | 3.299V | 3.041V | 7.83% | Fail |
| 5VSB | 4.961V | 4.811V | 3.02% | Pass |
The transient response is mediocre overall. Given the outdated design, I didn’t expect better results. Helly should improve the 3.3V rail’s response which is terrible.
Transient Response ATX v3.1 Tests
The PSU passes all ATX v3.1 transient response tests. So far, only the 800W model drops its 3.3V rail below 3.2V.
The 12V rail’s level drops low in the 200% transient load test but still outperforms the notably more expensive Cooler Master GX III model.
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