Cooler Master V750 Semi-Modular 750 W Review

Name: Cooler Master V750 Semi-Modular 750 W
Brand: Cooler Master

crmaris

on Aug 6th, 2014,

in Power Supplies.

Manufacturer: Cooler Master

Performance Rating, Performance per Dollar, Noise & Efficiency Rating »

Ripple Measurements

You will see the ripple levels we measured on the VSM750's rails 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 - Cooler Master VSM750
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	6.5 mV	5.6 mV	10.8 mV	5.4 mV	Pass
20% Load	8.2 mV	6.7 mV	11.4 mV	6.0 mV	Pass
30% Load	17.1 mV	7.7 mV	11.4 mV	6.8 mV	Pass
40% Load	17.4 mV	9.4 mV	12.6 mV	7.4 mV	Pass
50% Load	19.6 mV	10.4 mV	12.0 mV	7.7 mV	Pass
60% Load	21.4 mV	11.3 mV	13.7 mV	8.1 mV	Pass
70% Load	23.5 mV	12.2 mV	13.3 mV	8.6 mV	Pass
80% Load	25.1 mV	12.9 mV	13.9 mV	9.0 mV	Pass
90% Load	26.7 mV	13.8 mV	14.2 mV	9.5 mV	Pass
100% Load	29.3 mV	15.7 mV	15.9 mV	10.1 mV	Pass
110% Load	31.9 mV	16.5 mV	16.3 mV	10.9 mV	Pass
Crossload 1	15.1 mV	7.5 mV	12.6 mV	6.7 mV	Pass
Crossload 2	28.9 mV	14.9 mV	14.1 mV	9.2 mV	Pass

Ripple suppression was great on all rails. The unit's good design and its Japanese caps obviously did a fine job here. The good thing about Japanese caps is that they don't only perform incredibly well, but also keep their high performance for much longer than Chinese caps. In other words, they age much slower, which allows the PSU to retain most of its initial performance as time goes on.

Ripple at Full Load

You can see the AC ripple and noise the main rails registered (+12V, 5V, 3.3V, and 5VSB) in the following oscilloscope screenshots. 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 the standard for all measurements.