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.
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 | 8 | 7.2 | 28.2 |
40 | 8 | 9.6 | 36.8 |
60 | 11.4 | 11,8 | 47.2 |
80 | 12.8 | 14.6 | 56.6 |
100 | 15.6 | 17.4 | 66 |
Ripple suppression was pretty good on the 3.3V and the 5V rails, but surprisingly high on the 12V rails. This is tricky, as it’s making me want to say it was “bad” but it’s still significantly within the rated specifications and it’s simply just not as good as most other PSUs we’ve tested here at eTeknix.
3.3 volt @ 100%
5 volt @ 100%
12 volt @ 100%
Aluminum heat pipe cover discreetly hides copper piping 4 conductive copper heat pipes with Direct…
Stylish midi tower, space for mainboards up to ATX Two tempered glass side panels Rotatable…
Increased contact surface area allows for more heat to be dissipated at a time. Experience…
Honestly, I'm surprised that Redfall has managed to cling to life for this long at…
Premium 120mm fan featuring advanced blade technology, coupled with intelligent PWM speed control and vibrant…
The TUF GeForce RTX 4090 OC brings powerful cooling and power delivery to squeeze the…