Transient Response
Transient response in power supplies refers to how quickly and effectively the PSU stabilizes its output voltage during sudden changes in load demand, such as when a CPU or GPU increases its power draw. It’s measured by the time and voltage deviation during these shifts. A faster, smaller transient response ensures stable power, preventing instability or damage to components.
20% Load – 20ms
| Advanced Transient Response 20% - 50 Hz - No Caps | ||||
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 11.995V | 11.718V | 2.31% | Pass |
| 5V | 5.005V | 4.896V | 2.18% | Pass |
| 3.3V | 3.308V | 3.173V | 4.09% | Pass |
| 5VSB | 5.064V | 5.026V | 0.74% | Pass |
50% Load -20ms
| Advanced Transient Response 50% - 50 Hz - No Caps | ||||
| Voltage | Before | After | Change | Pass/Fail |
| 12V | 11.936V | 11.812V | 1.03% | Pass |
| 5V | 4.996V | 4.891V | 2.11% | Pass |
| 3.3V | 3.303V | 3.165V | 4.18% | Pass |
| 5VSB | 5.023V | 4.991V | 0.64% | Pass |
The transient response is generally mediocre. High voltage drops on all rails, especially at 12V and 5V.
Transient Response ATX v3.1 Tests
For PSUs without a 12+4 pin connector, the maximum applied load for the transient response tests is 150%, rather than 200%.
The PSU passes all ATX v3.1 transient response tests.
The 12V rail’s performance is below average in these tests.
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