To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the PR-BP0650-SM's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).
The +12V rail's ripple performance isn't great, that's for sure. But you can't call it bad, either. This isn't a high-end platform, so we are satisfied with lower-than 50mV ripple at +12V. The competition does perform much better in this discipline, though.
On the other rails, ripple suppression should be below 30mV in order to keep up with competing PSUs.
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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