To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the EDT1250EWT's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).
From 30% up to 50% load, we notice an increase in the +12V rail's ripple. But because ripple stays low in all cases, this strange behavior is nothing to worry about. In general, ripple suppression is pretty good; it's just not as good as in Super Flower's or Seasonic's top implementations. Enermax doesn't use in-cable caps like Super Flower does, and we don't see a reason to add them since our measurements are good enough.
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 0.01 V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.
Ripple At Full Load
Ripple At 110-Percent Load
Ripple At Cross-Load 1
Ripple At Cross-Load 2
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