Enermax Revolution87+ 850 W Review

Name: Enermax Revolution87+ 850 W
Brand: Enermax

crmaris

on Apr 23rd, 2012,

in Power Supplies.

Manufacturer: Enermax

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 ERV850EWT-G. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).

Ripple Measurements Enermax ERV850EWT-G
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	18.1 mV	11.9 mV	18.2 mV	13.9 mV	Pass
40% Load	28.8 mV	15.6 mV	20.8 mV	15.4 mV	Pass
50% Load	30.1 mV	17.4 mV	22.1 mV	19.1 mV	Pass
60% Load	32.3 mV	18.4 mV	23.0 mV	22.0 mV	Pass
80% Load	38.2 mV	20.3 mV	24.4 mV	22.5 mV	Pass
100% Load	44.8 mV	22.3 mV	25.7 mV	26.1 mV	Pass
Crossload 1	30.9 mV	14.6 mV	19.9 mV	13.5 mV	Pass
Crossload 2	38.5 mV	18.1 mV	19.3 mV	23.6 mV	Pass

Ripple suppression is decent but still isn't up to the level we expected from a high-end unit. The +12V rail at worst case registers 45mV while the minor rails are close to half their limit. Overall the DC output quality of this PSU is good, but still needs work to reach the corresponding of Delta, Seasonic and Super Flower units.

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.