PC Power & Cooling Silencer 760 W Review

Name: PC Power & Cooling Silencer 760 W
Brand: PC Power & Cooling

crmaris

on Apr 26th, 2011,

in Power Supplies.

Manufacturer: PC Power & Cooling

Value & Conclusion »

Ripple Measurements

In the following table you will find the ripple levels that we measured on the main rails of Silencer 760W. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V & 3.3V).

Ripple Measurements
Test	12 V	5 V	3.3 V	Pass/Fail
20% Load	10.2 mV	12.2 mV	5.8 mV	Pass
40% Load	16.8 mV	18.8 mV	7.2 mV	Pass
50% Load	20.8 mV	22.8 mV	8.8 mV	Pass
60% Load	22.6 mV	23.2 mV	8.8 mV	Pass
80% Load	23.8 mV	25.8 mV	9.8 mV	Pass
100% Load	27.4 mV	25.4 mV	10.2 mV	Pass
Crossload 1	21.8 mV	24.4 mV	15.8 mV	Pass
Crossload 2	25.6 mV	12.8 mV	7.2 mV	Pass

Ripple/noise suppresion at +12V and 3.3V is outstanding. Unfortunately we can't tell the same for 5V where ripple may not be so high, since it barely exceeded 25 mV, but compared to the ripple levels of the other two rails it was significant increased. However we strongly believe that the sample we had on our hands had a minor glitch at 5V which caused the increased ripple. If you take a look at the ripple oscilloscope screenshots of 5V rail you will notice some strange spikes that do not exist on the other two rails.

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). The bigger the fluctuations on the oscilloscope's screen the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals to 0.01V) as standard but sometimes we are forced to use 0.02 V/Div, meaning that the fluctuations will look smaller but actually this wont be the case.