Corsair HX1000i Modular Power Supply Review
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.
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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 | 6.4 | 3.8 | 12.2 |
40 | 7.6 | 5 | 13.4 |
60 | 8.2 | 6.4 | 14 |
80 | 10.2 | 8.5 | 16.6 |
100 | 13.1 | 10 | 18.8 |
Given how the RM1000 fared in ripple suppression, let’s just say it wasn’t the greatest, I expected the HX1000i to be fairly average. It wasn’t. CWT have done an amazing job of boosting the ripple suppression capabilities of this unit allowing it to rival top-class OEMs like Super Flower, Seasonic, Flextronics and Delta.
3.3 volt @ 100%
5 volt @ 100%
12 volt @ 100%