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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 BF650G'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	10.8mV	7.1mV	5.9mV	13.0mV	Pass
20% Load	16.6mV	7.8mV	7.1mV	13.4mV	Pass
30% Load	19.1mV	8.0mV	7.6mV	14.2mV	Pass
40% Load	20.6mV	8.9mV	9.9mV	14.4mV	Pass
50% Load	21.9mV	10.3mV	12.5mV	14.9mV	Pass
60% Load	24.1mV	10.7mV	12.0mV	15.6mV	Pass
70% Load	25.7mV	12.5mV	13.1mV	16.4mV	Pass
80% Load	26.8mV	13.7mV	12.9mV	18.9mV	Pass
90% Load	27.7mV	14.5mV	13.3mV	20.6mV	Pass
100% Load	29.2mV	16.1mV	14.0mV	24.0mV	Pass
110% Load	30.4mV	17.8mV	17.9mV	25.6mV	Pass
Cross-Load 1	20.9mV	11.8mV	10.0mV	8.6mV	Pass
Cross-Load 2	24.3mV	11.5mV	13.0mV	17.4mV	Pass

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The ripple suppression we observe on each rail is good. Together, CWT and BitFenix did a fine job on this platform.

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.