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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 SSR-600TL'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	13.2mV	7.5mV	5.8mV	3.3mV	Pass
20% Load	15.4mV	8.3mV	6.8mV	3.5mV	Pass
30% Load	17.4mV	9.1mV	7.2mV	3.8mV	Pass
40% Load	11.9mV	9.4mV	7.6mV	4.3mV	Pass
50% Load	10.6mV	9.7mV	8.1mV	4.7mV	Pass
60% Load	12.5mV	10.9mV	8.5mV	5.3mV	Pass
70% Load	14.1mV	11.9mV	8.9mV	6.3mV	Pass
80% Load	15.2mV	13.5mV	10.1mV	7.5mV	Pass
90% Load	16.4mV	13.7mV	9.9mV	8.1mV	Pass
100% Load	18.3mV	14.6mV	11.1mV	8.8mV	Pass
110% Load	19.6mV	15.0mV	11.3mV	9.1mV	Pass
Cross-Load 1	16.3mV	11.2mV	9.8mV	4.2mV	Pass
Cross-Load 2	18.4mV	12.8mV	8.5mV	8.3mV	Pass

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Seasonic's ripple suppression is excellent. There are in-line caps on the main ATX cable, which surely helps improve ripple suppression on the minor rails.

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.