Transient Response
20% Load – 20ms
| Advanced Transient Response 20% - 50 Hz - No Caps | ||||
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.085V | 11.988V | 0.80% | Pass |
| 5V | 5.099V | 5.023V | 1.49% | Pass |
| 3.3V | 3.293V | 3.147V | 4.44% | Pass |
| 5VSB | 5.144V | 5.104V | 0.77% | Pass |
50% Load -20ms
| Advanced Transient Response 50% - 50 Hz - No Caps | ||||
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 12.072V | 11.976V | 0.79% | Pass |
| 5V | 5.091V | 5.011V | 1.58% | Pass |
| 3.3V | 3.286V | 3.133V | 4.66% | Fail |
| 5VSB | 5.093V | 5.042V | 1.01% | Pass |
The transient response is good at 12V and 5V but needs improvement at 3.3V.
Transient Response ATX v3.1 Tests
The PSU passes all ATX v3.1 transient response tests, but the 12V and 3.3V rails drop low.
The 12V rail doesn’t perform well, dropping low on all tests.
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I read that ball bearing fans become significantly louder over their lifespan, so they’re deceptive in terms of noise. Is that true? Also, I read that if they’re dropped they can be ruined, so they’re more delicate than FDB fans. It seems like a no-brainer to exclusively use FDB fans in high-end PSUs. Ball bearing fans appear to be able to produce more static pressure than other fan types but since FDB fans apparently can be used in low-noise PSUs, it seems that that advantage isn’t enough to outweight the drawbacks.
With not high quality DBB fans yes this can be the case.