Corsair RM Series 650 W Review

Name: Corsair RM Series 650 W
Brand: Corsair

crmaris

on Nov 25th, 2013,

in Power Supplies.

Manufacturer: Corsair

Performance Rating, Performance per Dollar & Noise Rating »

Ripple Measurements

You will see the ripple levels we measured on the main rails of the RM650 in the following table. The limits are, according to the ATX specification, 120 mV (+12V) and 50 mV (5V, 3.3V, and 5VSB).

Ripple Measurements Corsair RM650
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	11.6 mV	5.8 mV	12.9 mV	3.8 mV	Pass
40% Load	15.8 mV	7.6 mV	15.6 mV	5.1 mV	Pass
50% Load	18.4 mV	8.6 mV	19.4 mV	6.1 mV	Pass
60% Load	21.0 mV	9.7 mV	20.3 mV	7.0 mV	Pass
80% Load	30.0 mV	12.1 mV	25.4 mV	9.7 mV	Pass
100% Load	42.5 mV	14.5 mV	31.2 mV	13.2 mV	Pass
110% Load	45.4 mV	15.7 mV	32.7 mV	14.9 mV	Pass
Crossload 1	12.3 mV	7.6 mV	15.5 mV	3.8 mV	Pass
Crossload 2	42.7 mV	14.5 mV	29.4 mV	13.4 mV	Pass

Ripple suppression on the +12V rail was fairly good, although we don't like to see readings over 40 mV as we are very picky when it comes to ripple. Ripple suppression on the minor rails, and more specifically at 5V and 5VSB, was very good, while it could be better on the 3.3V rail; but its ripple still won't cause the slightest of problems.

Ripple at Full Load

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