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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 Hydro G 650'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 | 5.9mV | 6.3mV | 5.4mV | 11.1mV | Pass |
| 20% Load | 26.4mV | 5.7mV | 7.4mV | 10.3mV | Pass |
| 30% Load | 20.2mV | 7.0mV | 8.0mV | 14.2mV | Pass |
| 40% Load | 20.1mV | 11.1mV | 9.9mV | 15.9mV | Pass |
| 50% Load | 20.3mV | 12.4mV | 10.2mV | 18.5mV | Pass |
| 60% Load | 19.8mV | 11.0mV | 10.8mV | 13.7mV | Pass |
| 70% Load | 20.0mV | 11.6mV | 12.2mV | 18.6mV | Pass |
| 80% Load | 20.1mV | 12.9mV | 13.5mV | 19.8mV | Pass |
| 90% Load | 21.0mV | 14.0mV | 14.4mV | 20.3mV | Pass |
| 100% Load | 22.6mV | 14.6mV | 16.3mV | 22.5mV | Pass |
| 110% Load | 24.9mV | 16.3mV | 17.7mV | 22.6mV | Pass |
| Cross-Load 1 | 21.5mV | 7.8mV | 8.3mV | 9.9mV | Pass |
| Cross-Load 2 | 22.3mV | 10.2mV | 16.6mV | 15.1mV | Pass |
Ripple suppression is very good on all rails. It might not be up to the level of Super Flower's power supplies, but we can still call the Hydro G 650 a ripple-proof PSU that totally covers the needs of enthusiasts looking for clean voltage outputs.
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 0.01V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.
