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Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the RM750x’s rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

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Test	12V	5V	3.3V	5VSB	Pass/Fail
10% Load	3.5mV	3.3mV	7.0mV	4.2mV	Pass
20% Load	4.9mV	4.1mV	7.8mV	4.8mV	Pass
30% Load	7.7mV	3.9mV	8.1mV	4.8mV	Pass
40% Load	7.4mV	7.3mV	9.5mV	8.4mV	Pass
50% Load	7.3mV	6.5mV	9.1mV	6.9mV	Pass
60% Load	6.3mV	4.1mV	8.3mV	5.1mV	Pass
70% Load	6.9mV	4.5mV	8.6mV	5.4mV	Pass
80% Load	7.0mV	5.7mV	8.5mV	6.4mV	Pass
90% Load	7.1mV	6.0mV	10.7mV	7.0mV	Pass
100% Load	7.3mV	5.4mV	10.1mV	6.5mV	Pass
110% Load	8.0mV	6.9mV	13.9mV	14.7mV	Pass
Cross-Load 1	9.9mV	5.9mV	10.7mV	6.0mV	Pass
Cross-Load 2	7.7mV	6.2mV	10.0mV	7.5mV	Pass

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Ripple suppression on all of the rails was excellent. Corsair's good design, along with in-cable capacitors, got the job done.

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.