To learn how we measure ripple, please click here.
The following table includes the ripple levels we measured on the SX500-G's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).
Ripple suppression is good on the +12V rail and average on the minor rails, where we want to see below 30mV readings (<20mV, ideally). The 5VSB rail is close to 34mV, and we did notice a strange (small) drop on this rail during the full load test.
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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