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XFX Pro Series Power Supplies (650W, 750W and 850W) Review

by Stuart Davidson - 3rd October 2010
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XFX Pro Series Power Supplies (650W, 750W and 850W)

XFX Pro Series 750W PSU Testing Results

XFX Pro Series 750W PSU Testing Results
35°C 190W 375W 560W 750W
3.3V 3.406V 3.410V 3.408V 3.404V
5V 5.109V 5.112V 5.110V 5.107V
12V 12.190V 12.190V 12.205V 12.200V
Efficiency 83.0% 87.5% 87.0% 83.0%
Noise Level
(PSU Only)
27.5dBA 28.8dBA 30.9dBA 34.0dBA
Ambient Temp 25°C 25°C 25°C 25°C
Exhaust Temp 27°C 30°C 35°C 36°C

Oscilloscope AC Ripple (mV p-p) +3.3 +5 +12
750W 20 17 31

On the last page we saw the results for XFX's 650w model and now we move on to the 750w model, tested at 25, 50, 75 and 100% of its rating. The 750w model offers performance which is just as impressive as the 650w model with the +5v being particularly strong on this version. The higher specification components in the 750w model also have a knock on effect to the efficiency and AC ripple results where we peak at 87.5% for the former and see the latter fall to 20/17/31Mv (3.3/5/12v).

The increase in electrical performance also benefits the temperature of the unit and despite running at higher watt ratings the 750w is slightly quieter and 2°C cooler at 100% load.
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