DeepCool PN850M ATX v3.1 PSU Review

Transient Response

20% Load – 20ms

Voltage Before After Change Pass/Fail
12V 11.993V 11.755V 1.98% Pass
5V 5.024V 4.941V 1.66% Pass
3.3V 3.345V 3.211V 4.01% Pass
5VSB 5.036V 4.984V 1.03% Pass

50% Load -20ms

Voltage Before After Change Pass/Fail
12V 11.969V 11.816V 1.28% Pass
5V 5.017V 4.913V 2.07% Pass
3.3V 3.338V 3.203V 4.06% Pass
5VSB 4.992V 4.939V 1.06% Pass

The transient response at 12V should be tighter. At 3.3V it is good to see the rail keeping its voltage above 3.2V at both tests.

Transient Response ATX v3.x Tests

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

The 12V rail performs very well in these tests.

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