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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 L10-CM-600's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).
| Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
|---|---|---|---|---|---|
| 10% Load | 6.4mV | 13.9mV | 11.0mV | 11.8mV | Pass |
| 20% Load | 10.6mV | 17.3mV | 15.3mV | 13.4mV | Pass |
| 30% Load | 10.5mV | 19.4mV | 17.8mV | 15.4mV | Pass |
| 40% Load | 11.5mV | 20.1mV | 20.5mV | 16.4mV | Pass |
| 50% Load | 13.2mV | 21.6mV | 22.2mV | 17.3mV | Pass |
| 60% Load | 15.9mV | 22.9mV | 24.7mV | 19.0mV | Pass |
| 70% Load | 19.5mV | 24.2mV | 27.2mV | 20.2mV | Pass |
| 80% Load | 23.0mV | 25.4mV | 29.9mV | 21.6mV | Pass |
| 90% Load | 28.5mV | 28.7mV | 32.6mV | 22.9mV | Pass |
| 100% Load | 35.1mV | 29.7mV | 35.4mV | 26.0mV | Pass |
| 110% Load | 46.9mV | 31.6mV | 38.8mV | 27.9mV | Pass |
| Cross-Load 1 | 18.3mV | 24.5mV | 18.7mV | 20.2mV | Pass |
| Cross-Load 2 | 31.3mV | 31.2mV | 37.8mV | 24.4mV | Pass |
Ripple suppression is quite good at +12V and on the 5VSB rail, and it's good enough at 5V and 5VSB. The performance difference between this PSU and the Pure Power 9 600W is huge in our cross-load tests thanks to the minor rails' independent regulation.
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
Ripple At 110-Percent Load
Ripple At Cross-Load 1
Ripple At Cross-Load 2
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