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 | 4.2 | 6.6 | 15.6 |
| 40 | 4.8 | 6.6 | 18.6 |
| 60 | 6 | 7 | 24 |
| 80 | 8.8 | 8 | 26.6 |
| 100 | 9.6 | 9 | 28.8 |
Very tight ripple suppression in all load scenarios, especially so on the 3.3v and 5v rails. The 12v rail specification obviously allows for more ripple and again the 660W does a fantastic job.
3.3 volt @ 100%
5 volt @ 100%
12 volt @ 100%
The ROG Delta S Wireless is the first dual-mode wireless ROG gaming headset. It features…
DimensionsLength30.5 mmWidth24.4 mmColourPrimary ColourBlackStorage PortsM.2 PCIe 4.0 x42SATA 6G (internal)4LightingLightingYesLighting ColourRGBInternal PortsCPU Power Supply1x 4-Pin,…
SetSetYesNumber of products in set2LightingLightingYesLighting ColourRGBMemoryMemory size (total)32 GBMemory TypeDDR5Number of modules2Memory Speed6000 MHzMemory voltage1.4…
High-quality, elegant as well as timeless design and technical innovation - these are the features…
Coiled keyboard cable with professional, expert sleeving USB Type A to Micro USB powder coated…
ColourPrimary ColourBlackForm FactorMotherboard formfactorATXStorage PortsSATA 6G (internal)4WiFi & LANLAN ports1x 2.5 Gbit/sMotherboardMotherboard ChipsetIntel B760CPUCPU ManufacturerIntelCPU…