EVGA SuperNOVA NEX750G 750 W Review

Name: EVGA SuperNOVA NEX750G 750 W
Brand: EVGA

crmaris

on Dec 9th, 2012,

in Power Supplies.

Manufacturer: EVGA

Performance Rating & Performance per Dollar »

Ripple Measurements

You will see the ripple levels that we measured on the main rails of the NEX750G 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 EVGA NEX750G
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	13.0 mV	11.6 mV	13.9 mV	18.7 mV	Pass
40% Load	16.0 mV	13.1 mV	19.8 mV	19.4 mV	Pass
50% Load	19.1 mV	15.2 mV	23.8 mV	19.6 mV	Pass
60% Load	22.8 mV	16.3 mV	28.2 mV	21.1 mV	Pass
80% Load	25.8 mV	20.2 mV	35.4 mV	21.8 mV	Pass
100% Load	24.5 mV	21.2 mV	42.4 mV	25.2 mV	Pass
110% Load	26.9 mV	21.8 mV	45.3 mV	27.1 mV	Pass
Crossload 1	30.2 mV	44.0 mV	37.9 mV	25.0 mV	Pass
Crossload 2	25.5 mV	29.4 mV	41.8 mV	24.8 mV	Pass

Ripple suppression on all rails is, except for the 3.3V rail, exceptional; clearly showing that the use of a proper amount of high-quality caps can lead to really good results. However, the 3.3V rail proved to be the weak link of this PSU once again. Ripple suppression on this rail clearly can't keep up with the other rails.

Ripple at Full Load

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