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Cougar PowerX 550W Power Supply Review

Cougar PowerX 550W Power Supply Review

Cougar PowerX 550W Power Supply Review

Testing Results

Power Supply Testing Results
40°C 140W 275W 410W 550W
3.3V 3.301V 3.301V 3.299V 3.297V
5V 5.005V 5.010V 5.000V 4.909V
12V 12.010V 12.001V 11.980V 11.955V
Efficiency 81.5% 85.6% 84.1% 82.0%
Noise Level
(PSU Only)
25dBA 26dBA 29dBA 35dBA
Ambient Temp 25°C 25°C 25°C 25°C
Exhaust Temp 32.1°C 38.6°C 40.1°C 48.5°C

Oscilloscope AC Ripple (mV p-p) +3.3 +5 +12
550W 35 40 70

As with previous reviews testing PSUs with multiple 12v rails the readings above show the lowest result on the 12v rails, keeping the table as simple as possible.

In our first set of results we look at the performance of the PowerX when using our various testing tools to run the PSU in a controlled environment at 40°C. Looking first to the 12v, 3.3v and 5v performance we see a unit which supplies decent readings with some fluctuation as the load increases. AC ripple is average in this PSU, noisier than we would normally expect but still within specifications and efficiency does meet the bronze standard. Temperatures are also decent during testing and the fan used is barely audible right up to around 75% load.

About Author

Stuart Davidson

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