To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the rails of the RM750i unit. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).
Overall, ripple suppression is very good with the +12V rail, which is the most significant of all, registering the second-best performance in this category and surpassing even the high-end Seasonic Snow Silent-750. Only Super Flower's Leadex platform, used in the EVGA 750 G2 unit — which is, indeed, ripple-proof — managed to register a better performance here and take the lead.
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.