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 | 6.2 | 5 | 11.4 |
| 40 | 10.4 | 6 | 15.6 |
| 60 | 12 | 7.2 | 21 |
| 80 | 14.4 | 9 | 24.8 |
| 100 | 15 | 10 | 27.8 |
Ripple on this unit was much lower than I expected, with good regulation across all of the rails. I’ve seen units of this output do better, but more often than not, they’re much more expensive units. Either way, these are good results.
3.3 volt @ 100%
5 volt @ 100%
12 volt @ 100%
Compatible with all intel form factors up to ATX12V Ver 3.0 All premium Japanese branding…
Pre-built gaming PC for mid-range gaming and streaming Cherry-picked hardware and hand-built by Overclockers UK’s…
Premium 120mm fan featuring advanced blade technology, coupled with intelligent PWM speed control and vibrant…
MaterialsMaterialsCarbon FibreTypeRadiator typeCrossflow / X-FlowColourPrimary ColourWhiteLightingLightingNoDimensionsLength278 mmWidth133 mmHeight29.6 mmRadiator size240 mmRadiator SpecificationsFin density (FPI)16 FPIFan…
The New AIO cooler from Sapphire offers cooler options in 240mm and 360mm sizes with…
Are you ready for Manor Lords? It seems many are, with the game blasting past…