To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the GX-F750's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).
Ripple suppression is great overall, with the +12V rail staying below 11mV at full load and not surpassing 12mV with 110% of the PSU's maximum-rated load.
With that said, we tested this PSU at 40°C and not the 45°C we usually use due to the problems faced with our first sample. Still, we're pretty sure that the 5°C difference won't affect this unit's ripple suppression in a meaningful way.
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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