Ripple Measurements
In the following table you will find the ripple levels that we measured on the main rails of SF-500P14FG. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).
Ripple Measurements Super Flower SF-500P14FG |
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Test | 12 V | 5 V | 3.3 V | 5VSB | Pass/Fail |
20% Load | 11.2 mV | 8.6 mV | 7.4 mV | 5.2 mV | Pass |
40% Load | 13.2 mV | 9.2 mV | 8.6 mV | 5.8 mV | Pass |
50% Load | 14.2 mV | 9.2 mV | 9.2 mV | 6.4 mV | Pass |
60% Load | 15.0 mV | 9.8 mV | 10.6 mV | 6.8 mV | Pass |
80% Load | 18.2 mV | 11.2 mV | 13.4 mV | 8.0 mV | Pass |
100% Load | 21.8 mV | 14.8 mV | 19.4 mV | 9.6 mV | Pass |
120% Load | 27.8 mV | 17.0 mV | 21.8 mV | 11.0 mV | Pass |
Crossload 1 | 14.8 mV | 15.8 mV | 17.8 mV | 6.2 mV | Pass |
Crossload 2 | 18.2 mV | 10.2 mV | 12.6 mV | 7.0 mV | Pass |
Ripple/noise suppression is very good and even when we overpowered the PSU to 600W we didn't notice any dramatic increases in ripple. This clearly shows that Super Flower paid extra attention to ripple filtering and the result is definitely noteworthy.
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 0.02 V/Div (each vertical division/box equals to 0.02V) as standard.
Ripple at 120% load
Ripple at Crossload 1
Ripple at Crossload 2