Corsair RM1000x 1000 Watt 80 PLUS Gold Review




/ 9 years ago

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Ripple


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. millivolt ripple is measured by the peak to peak size of the voltage curve.

sample_scalev2

Sample Ripple Graph

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. Millivolt figures are stated to the closest increment of 5 given their variability.

 Load (%)   3.3V Ripple   5V Ripple   12V Ripple 
 20  2.2  3.6  4.2
 40  3  4.4  5.4
 60  5.3  5.6  5.8
 80  5.3  6.6  7.8
 100  6  8.2  12.6

Just like we saw with the voltage regulation and PFC, the ripple performance is spectacular, easily some of the best scores we’ve seen and a sure sign that this unit can offer up clean and stable power delivery.

3.3 volt @ 100%

rm1000 3v

5 volt @ 100%

rm1000 5v

12 volt @ 100%

rm1000 12v

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