Deepcool PQ850G ATX v3.1 PSU Review

Transient Response

20% Load – 20ms

Voltage Before After Change Pass/Fail
12V 12.219V 12.116V 0.84% Pass
5V 5.051V 4.900V 2.99% Pass
3.3V 3.335V 3.181V 4.61% Pass
5VSB 5.108V 5.073V 0.69% Pass

50% Load -20ms

Voltage Before After Change Pass/Fail
12V 12.195V 12.107V 0.72% Pass
5V 5.041V 4.896V 2.88% Pass
3.3V 3.323V 3.165V 4.75% Pass
5VSB 5.064V 5.019V 0.90% Pass

The transient response is good at 12V, the most critical rail, and at 5VSB, where it doesn’t matter much. It should be better at 3.3V, where it drops below 3.2V.

Transient Response ATX v3.1 Tests

The PSU passes all ATX v3.1 transient response tests. However, in the 200% load test, the 3.3V rail is lower than 3.2V.

The 12V rail performs well, achieving first place in the 200% transient load test!

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