Corsair SF850 ATX v3.1 PSU Review

Transient Response

20% Load – 20ms

Voltage Before After Change Pass/Fail
12V 12.142V 12.004V 1.14% Pass
5V 4.987V 4.896V 1.83% Pass
3.3V 3.310V 3.242V 2.05% Pass
5VSB 5.067V 5.007V 1.18% Pass

50% Load -20ms

Voltage Before After Change Pass/Fail
12V 12.136V 12.066V 0.57% Pass
5V 4.983V 4.900V 1.66% Pass
3.3V 3.305V 3.233V 2.17% Pass
5VSB 5.045V 4.981V 1.27% Pass

The transient response is excellent at 12V, where it matters the most. It is also pretty good on the other rails.

Transient Response ATX v3.1 Tests

The PSU passes all ATX v3.1 transient response tests.

The 12V rail keeps its voltage level at a very high level in the 200% load test.

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