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 | 10 | 10 | 10 |
| 40 | 10 | 10 | 15 |
| 60 | 15 | 10 | 15 |
| 80 | 15 | 15 | 20 |
| 100 | 20 | 15 | 25 |
1080P FHD IPS Screen:This 15.6" portable monitor will offer you more vivid colors and crisp…
★[HIGH PERFORMANCE ANDROID TABLET ]✨ - Pritom Tronpad D10 tablet comes with the latest Android…
【TOP PERFORMANCE】: ACEMAGIC AX16PRO Laptop is equipped with the latest generation of high-performance AMD Ryzen…
AUTO CONNECT & GOOGLE FAST PAIR: The Go Air Pop+ True Wireless earbuds turn on…
How to Play: Draw cards and try to avoid the dreaded Exploding Kitten! Use strategic…
32-inch 4K (3840 x 2160) QD-OLED gaming monitor with 240 Hz refresh rate and 0.03…