Riotoro 1200W Builder Edition PSU Review

Crmaris October 17, 2018 Featured Tech Reviews, Power Supplies, Reviews

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.