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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 PSX 850GFM’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 | 21.1mV | 7.5mV | 7.2mV | 3.8mV | Pass |
| 20% Load | 12.3mV | 8.5mV | 8.8mV | 4.0mV | Pass |
| 30% Load | 10.5mV | 9.7mV | 10.3mV | 4.2mV | Pass |
| 40% Load | 10.9mV | 10.8mV | 12.0mV | 5.2mV | Pass |
| 50% Load | 12.2mV | 13.0mV | 12.9mV | 6.5mV | Pass |
| 60% Load | 14.4mV | 15.6mV | 16.1mV | 8.3mV | Pass |
| 70% Load | 15.6mV | 14.4mV | 14.4mV | 6.9mV | Pass |
| 80% Load | 17.1mV | 16.5mV | 17.3mV | 8.1mV | Pass |
| 90% Load | 19.7mV | 18.1mV | 18.1mV | 9.5mV | Pass |
| 100% Load | 21.2mV | 19.0mV | 19.2mV | 8.9mV | Pass |
| 110% Load | 28.6mV | 20.3mV | 20.1mV | 9.4mV | Pass |
| Cross-Load 1 | 24.9mV | 12.7mV | 13.2mV | 4.2mV | Pass |
| Cross-Load 2 | 22.6mV | 15.3mV | 15.1mV | 8.3mV | Pass |
Ripple suppression was very good on every rail. High Power did a pretty good job in this department, although still it needs a little more effort to reach Super Flower's levels. Just remember that Super Flower's implementations are also more expensive.
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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