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 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 | 3 | 3.6 | 6.4 |
| 40 | 3.2 | 4.2 | 7.4 |
| 60 | 4 | 4.8 | 9.2 |
| 80 | 4.2 | 5.4 | 10 |
| 100 | 4.8 | 6 | 9.8 |
Ripple performance is well above average here, with tight regulation across the board and well within what I would call a safe margin.
3.3 volt @ 100%
5 volt @ 100%
12 volt @ 100%
Fractal fuse flair with function in the new Pop series of cases that does not…
FireCuda® 530 with heatsink offers a minimalist design, anodized aluminium body, and finely textured micropore…
TD300 Mesh brings together modern presentation and performance with its three dimensional artistic mesh front…
System Power 10 650W has been built with price-conscious users in mind that do not…
The Dusk Edition SOHO 240 AIO CPU offers more than just outstanding cooling for your…
S200 TG ARGB Mid Tower Chassis is an ATX case with a mesh front panel…