Gamerstorm DQ850-M PSU Review

crmaris September 25, 2018 Featured Announcement, Featured Tech News, 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 DQ850-M’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	9.6 mV	12.4 mV	11.4 mV	7.4 mV	Pass
20% Load	12.6 mV	13.3 mV	13.0 mV	8.4 mV	Pass
30% Load	11.7 mV	13.8 mV	13.0 mV	9.5 mV	Pass
40% Load	13.0 mV	13.6 mV	13.8 mV	10.3 mV	Pass
50% Load	13.0 mV	14.6 mV	15.0 mV	11.5 mV	Pass
60% Load	11.9 mV	15.1 mV	15.7 mV	13.2 mV	Pass
70% Load	11.4 mV	17.3 mV	17.5 mV	19.1 mV	Pass
80% Load	12.4 mV	17.6 mV	19.6 mV	21.4 mV	Pass
90% Load	12.4 mV	17.4 mV	20.8 mV	18.4 mV	Pass
100% Load	19.9 mV	18.2 mV	21.9 mV	22.5 mV	Pass
110% Load	19.3 mV	18.7 mV	22.5 mV	25.0 mV	Pass
Crossload 1	17.4 mV	14.6 mV	21.3 mV	6.5 mV	Pass
Crossload 2	18.3 mV	17.5 mV	16.3 mV	17.0 mV	Pass

The ripple suppression is good overall, despite the lack of extra filtering caps on the modular cables.

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.