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Riotoro 1200W Builder Edition PSU Review

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the PR-GP1200FM’s rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 7.9 mV 5.7 mV 10.0 mV 6.1 mV Pass
20% Load 10.4 mV 5.9 mV 11.1 mV 5.9 mV Pass
30% Load 11.0 mV 6.5 mV 12.3 mV 6.6 mV Pass
40% Load 11.2 mV 7.1 mV 13.7 mV 7.1 mV Pass
50% Load 12.1 mV 8.1 mV 15.0 mV 7.8 mV Pass
60% Load 11.6 mV 9.3 mV 17.2 mV 8.5 mV Pass
70% Load 12.7 mV 9.5 mV 19.1 mV 8.2 mV Pass
80% Load 13.6 mV 11.0 mV 22.9 mV 10.0 mV Pass
90% Load 13.4 mV 11.2 mV 24.8 mV 10.8 mV Pass
100% Load 23.8 mV 11.0 mV 27.1 mV 11.8 mV Pass
105% Load 16.6 mV 12.7 mV 24.5 mV 12.1 mV Pass
Crossload 1 11.2 mV 7.4 mV 21.3 mV 7.6 mV Pass
Crossload 2 23.2 mV 12.4 mV 23.0 mV 12.2 mV Pass

 

The ripple suppression is pretty good on all rails. Please do note that with 105% load we measure less ripple because we conducted this test at a much lower temperature compared to the 100% test. We were forced to do this because the PSU kept shutting down with anything higher than 100% of its max rated capacity, under high operating temperatures.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.

Ripple At Full Load

Ripple At 110-Percent Load

Ripple At Cross-Load 1

Ripple At Cross-Load 2

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