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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 1600 T2'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	2.0mV	3.9mV	4.0mV	5.4mV	Pass
20% Load	3.0mV	5.4mV	5.2mV	6.9mV	Pass
30% Load	4.2mV	8.4mV	7.7mV	8.2mV	Pass
40% Load	5.0mV	9.0mV	10.1mV	9.6mV	Pass
50% Load	5.4mV	10.6mV	8.4mV	10.4mV	Pass
60% Load	5.6mV	11.5mV	9.2mV	11.4mV	Pass
70% Load	6.2mV	13.7mV	10.9mV	13.2mV	Pass
80% Load	6.1mV	15.7mV	12.4mV	15.4mV	Pass
90% Load	6.8mV	17.5mV	13.7mV	20.5mV	Pass
100% Load	7.6mV	19.8mV	17.6mV	25.9mV	Pass
110% Load	8.3mV	20.5mV	29.4mV	24.4mV	Pass
Cross-Load 1	1.9mV	4.5mV	6.6mV	9.5mV	Pass
Cross-Load 2	7.8mV	19.2mV	14.4mV	24.5mV	Pass

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EVGA's ripple suppression is very good. It's only with 110% load that we notice the 3.3V rail misbehaving, reaching close to 30mV. That's operating the PSU beyond its specifications, though, so we can't really complain.

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.