XFX Pro 750W Black Edition Fully Modular Review




/ 11 years ago

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Noise and Ripple can easily be measured by an oscilloscope. These show how much voltage fluctuation there is on a particular rail. We tested the rail stability of the 3.3 volt, 5 volt and 12 volt rails using an identical time and millivolt scale for all graphs.

The latest ATX 12 volt version 2.3 specifications state that ripple from peak to peak must be no higher than 50 millivolts for the 3.3 volt and 5 volt rails, while the 12 volt rail is allowed up to 120 millivolts peak to peak to stay within specifications.

Load (%) 3.3V Ripple 5V Ripple 12V Ripple
20 XFX Pro750 Black Edition Load (1) XFX Pro750 Black Edition Load (2) XFX Pro750 Black Edition Load (3)
40 XFX Pro750 Black Edition Load (4) XFX Pro750 Black Edition Load (5) XFX Pro750 Black Edition Load (6)
60 XFX Pro750 Black Edition Load (7) XFX Pro750 Black Edition Load (8) XFX Pro750 Black Edition Load (9)
80 XFX Pro750 Black Edition Load (10) XFX Pro750 Black Edition Load (11) XFX Pro750 Black Edition Load (12)
100 XFX Pro750 Black Edition Load (13) XFX Pro750 Black Edition Load (14) XFX Pro750 Black Edition Load (15)

As we can see the XFX Pro 750W Black Edition power supply had super tight regulation with very low noise and ripple across all rails. It was well within ATX specification and almost close to a total flat-line. In an ideal world there would be a totally flat-line with 0 millivolts of peak to peak ripple, the XFX unit wasn’t far off this.

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