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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 650 G3’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 | 5.5mV | 4.0mV | 4.5mV | 6.5mV | Pass |
| 20% Load | 8.0mV | 5.6mV | 5.4mV | 8.2mV | Pass |
| 30% Load | 8.7mV | 5.8mV | 5.7mV | 9.2mV | Pass |
| 40% Load | 9.3mV | 6.9mV | 6.6mV | 10.7mV | Pass |
| 50% Load | 10.5mV | 7.5mV | 7.0mV | 12.2mV | Pass |
| 60% Load | 10.5mV | 8.8mV | 7.9mV | 13.8mV | Pass |
| 70% Load | 11.1mV | 9.8mV | 9.0mV | 17.0mV | Pass |
| 80% Load | 11.3mV | 11.1mV | 9.5mV | 18.8mV | Pass |
| 90% Load | 12.3mV | 11.9mV | 10.6mV | 20.5mV | Pass |
| 100% Load | 13.1mV | 13.4mV | 12.0mV | 27.5mV | Pass |
| 110% Load | 14.3mV | 14.5mV | 13.3mV | 30.1mV | Pass |
| Cross-Load 1 | 7.5mV | 6.0mV | 7.6mV | 20.2mV | Pass |
| Cross-Load 2 | 12.8mV | 12.7mV | 10.6mV | 20.3mV | Pass |
As we've come to expect from Super Flower designs, the 650 G3's ripple suppression is excellent. We did hope for lower ripple at 5VSB, but SF is apparently planning to improve this circuit in the future.
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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