Antec EarthWatts Platinum 650 W Review

Name: Antec EarthWatts Platinum 650 W
Brand: Antec

crmaris

on Jan 26th, 2012,

in Power Supplies.

Manufacturer: Antec

Performance Rating & Performance per Dollar »

Ripple Measurements

In the following table you will find the ripple levels that we measured on the main rails of EA-650 Platinum. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).

Ripple Measurements Antec EA-650 Platinum
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	31.3 mV	26.1 mV	23.0 mV	14.0 mV	Pass
40% Load	31.9 mV	26.7 mV	25.9 mV	14.7 mV	Pass
50% Load	33.3 mV	27.4 mV	25.7 mV	15.5 mV	Pass
60% Load	34.9 mV	28.1 mV	27.5 mV	16.3 mV	Pass
80% Load	39.0 mV	31.7 mV	27.6 mV	18.7 mV	Pass
100% Load	45.2 mV	35.8 mV	32.2 mV	20.1 mV	Pass
Crossload 1	38.6 mV	35.0 mV	22.5 mV	14.9 mV	Pass
Crossload 2	38.5 mV	31.1 mV	29.2 mV	18.6 mV	Pass

Ripple at +12V is at good enough levels, although surely it's not among the lowest we have ever measured at this rail. On the minor rails ripple is a little higher than what we would like to see (<30mV) however still far from the 50mV limit. Finally at 5VSB ripple suppression is quite good. Overall not ground breaking performance in ripple suppression but at least the PSU registers decent performance.

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 0.01V) as standard.