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Corsair HX1200 PSU Review

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the HX1200's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load6.7mV7.3mV6.9mV7.4mVPass
20% Load7.8mV7.2mV7.4mV8.4mVPass
30% Load9.7mV6.9mV7.7mV8.9mVPass
40% Load11.1mV6.6mV8.0mV8.7mVPass
50% Load12.0mV6.1mV8.4mV9.5mVPass
60% Load15.8mV7.1mV8.6mV10.9mVPass
70% Load12.9mV9.4mV11.9mV12.6mVPass
80% Load12.4mV8.6mV11.2mV12.8mVPass
90% Load14.3mV8.8mV10.6mV13.8mVPass
100% Load17.2mV9.9mV10.8mV15.5mVPass
110% Load17.3mV10.1mV10.8mV16.2mVPass
Cross-Load 19.1mV9.4mV9.8mV9.7mVPass
Cross-Load 216.6mV10.3mV15.8mV15.2mVPass
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Ripple suppression is excellent, thanks to a great number of filtering caps, and some extra caps on the ATX, EPS, and PCIe cables as well. Those capacitors make the corresponding cables bulky, but they please reviewers.

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

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Ripple At 110-Percent Load

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Ripple At Cross-Load 1

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Ripple At Cross-Load 2

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