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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 ACP-850FP7'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 | 5.6mV | 7.2mV | 6.7mV | 10.8mV | Pass |
| 20% Load | 10.5mV | 7.9mV | 7.1mV | 14.8mV | Pass |
| 30% Load | 11.6mV | 9.3mV | 7.9mV | 15.0mV | Pass |
| 40% Load | 13.0mV | 9.9mV | 9.7mV | 15.9mV | Pass |
| 50% Load | 15.6mV | 10.2mV | 9.1mV | 17.5mV | Pass |
| 60% Load | 17.4mV | 11.2mV | 10.6mV | 19.8mV | Pass |
| 70% Load | 19.6mV | 12.8mV | 12.3mV | 20.1mV | Pass |
| 80% Load | 22.6mV | 12.7mV | 13.0mV | 21.9mV | Pass |
| 90% Load | 24.3mV | 14.2mV | 12.9mV | 23.9mV | Pass |
| 100% Load | 27.2mV | 15.6mV | 14.1mV | 25.8mV | Pass |
| 110% Load | 30.4mV | 16.2mV | 16.3mV | 29.6mV | Pass |
| Cross-Load 1 | 21.4mV | 9.4mV | 9.0mV | 13.7mV | Pass |
| Cross-Load 2 | 27.6mV | 15.6mV | 13.4mV | 25.9mV | Pass |
Our ripple suppression readings are very good. We might not be seeing Super Flower's flawless readings at +12V, but keep in mind that the ACP-850FP7 also doesn't use the extra ripple filtering caps that SF's units are equipped with (on their modular cables).
In other words, Aerocool didn't have to rely on special modular cables, which are typically bulky enough to cause headaches when it comes to cable management.
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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