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PC Power and Cooling Silencer Mk.III 850W Power Supply Review


by Stuart Davidson - 6th February 2013
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PC Power and Cooling Silencer Mk.III 850W Power Supply Review

Testing Results


Power Supply Testing Results
40°C 215W 425W 640W 850W
3.3V 3.312V 3.308V 3.301V 3.300V
5V 5.105V 5.101V 5.060V 5.010V
12V 12.075V 12.055V 12.041V 12.010V
 
Efficiency 88.4% 92.6% 92.1% 89.0%
 
Noise Level
(PSU Only)
N/A 25dBA 30dBA 33dBA
 
Ambient Temp 25°C 25°C 25°C 25°C
Exhaust Temp 27.2°C 28.1°C 29.2°C 30.9°C

Oscilloscope AC Ripple (mV p-p) +3.3 +5 +12
850W 18 12 45

In our results we look at the performance of the PSU when using our various testing tools to run the it in a controlled environment at 40°C. Looking first to the 12v, 3.3v and 5v performance we see a unit which supplies stable readings across the various lines. There is only minimal fluctuation throughout the tests and this continues elsewhere as AC ripple is also low on each of the readings. Each is well within requirements at 18/12(out of 50) on 3.3/5v and 45(out of 120) on 12v, an impressive result.

Looking at the efficiency of the PSU PC Power and Cooling achieve the gold specification and temperatures are also decent. As before this is particularly impressive as we are running the PSU fanless up to 50% load.
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