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Enermax Revolution X’t II 750W Power Supply Review

Enermax recently released a successor to the Revolution X't line and the new models are made by CWT, featuring 80 PLUS Gold efficiency, Japanese caps and a quality fan. Today, we're testing the ERX750AWT model.

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the ERX750AWT's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load18.9mV30.3mV11.1mV20.0mVPass
20% Load23.3mV29.8mV12.8mV21.4mVPass
30% Load25.4mV31.7mV16.0mV19.9mVPass
40% Load27.2mV30.5mV18.7mV20.5mVPass
50% Load30.4mV30.6mV16.5mV21.6mVPass
60% Load35.1mV31.3mV17.4mV21.9mVPass
70% Load36.0mV30.5mV19.2mV22.0mVPass
80% Load37.6mV31.8mV24.7mV22.2mVPass
90% Load41.7mV33.4mV26.3mV23.3mVPass
100% Load45.3mV36.1mV28.5mV25.8mVPass
110% Load48.4mV37.2mV29.9mV26.5mVPass
Cross-Load 131.2mV31.7mV17.6mV25.3mVPass
Cross-Load 239.5mV33.3mV27.0mV25.4mVPass
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Ripple suppression at +12V is quite good, although it can't beat the competing Corsair and EVGA offerings. On the other rails (and especially at 5V), ripple could be lower given the high-quality caps Enermax uses. More filtering caps should probably be used, especially on the modular board, which is empty of filtering components.

Ripple Oscilloscope Screenshots

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

Ripple At Full Load

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Ripple At 110-Percent Load

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Ripple At Cross-Load 1

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Ripple At Cross-Load 2

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Aris Mpitziopoulos
Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.