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 | 15 | 15 | 20 |
40 | 15 | 15 | 20 |
60 | 15 | 15 | 25 |
80 | 20 | 20 | 30 |
100 | 20 | 25 | 35 |
New-Gen WiFi Standard – Supporting 802.11ax WiFi standard for better efficiency and throughput. Ultra-fast WiFi…
Amazon Exclusive Store more, compute faster, and do it confidently with the proven reliability of…
The New Definition of High Definition Looks Good, Feels Good, Does Good Streamlined & Seamless…
80 PLUS Bronze Certified: Provides up to 88% operational efficiency, generating less heat and lowering…
Razer TriForce Titanium 50mm Drivers For Powerful, Lifelike Audio. Our patented 3-part driver design pushes…
17" 16:10 FHD+ (1920x1200), 165 Hz IPS-level panel Intel Core i9-13980HX Processor RTX 4080, GDDR6…