Ripple Measurements
In the following table you will find the ripple levels that we measured on the main rails of the SF-650P14PE. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).
Ripple Measurements Super Flower SF-650P14PE |
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Test | 12 V | 5 V | 3.3 V | 5VSB | Pass/Fail |
20% Load | 15.1 mV | 16.2 mV | 14.2 mV | 5.4 mV | Pass |
40% Load | 17.9 mV | 16.0 mV | 14.9 mV | 6.0 mV | Pass |
50% Load | 17.9 mV | 15.8 mV | 14.9 mV | 6.1 mV | Pass |
60% Load | 20.1 mV | 15.5 mV | 15.1 mV | 6.0 mV | Pass |
80% Load | 24.8 mV | 17.3 mV | 17.4 mV | 6.6 mV | Pass |
100% Load | 30.7 mV | 19.5 mV | 20.5 mV | 7.9 mV | Pass |
Crossload 1 | 16.2 mV | 19.8 mV | 18.3 mV | 7.8 mV | Pass |
Crossload 2 | 29.5 mV | 16.1 mV | 16.5 mV | 6.8 mV | Pass |
Ripple measurements on most of the modern, high quality, PSUs are pretty boring since from the beginning we know what to expect. In our opinion the ATX spec ripple limits should be revised and lowered, since we rarely encounter a PSU that manages to surpass them. In this case the Golden King registers excellent ripple suppression and at +12V, the most important rail, worst case ripple is about one fourth of the corresponding limit.
Ripple at Full Load
In the following oscilloscope screenshots you can see the AC ripple and noise that the main rails registered (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the oscilloscope's screen the bigger the ripple/noise. For all measurements we set 0.01 V/Div (each vertical division/box equals to 0.01V) as standard.
Ripple at Crossload 1
Ripple at Crossload 2