Originally Posted by Drizzt5
got one, just rememberd that I never did this. How do I test voltages?
Depends what you want to know.
I suggest restarting your computer, letting it load and then sit for 10-15 minutes, then you can take voltages at idle.
all you do is take the black lead and shove it into a ground prong and you use the red lead to test the other rails.
You will set your DMM to 20V, which means it will be reading nothing more then 20V, so there should be a 20V on the DMM somewhere..
You can figure out what rail it is pretty quickly, There is only 12V, 5V, 3.3V and they will be +/-.
For a rail to be within ATX specs it needs to be within 5% +/- of its voltage.
So if your on the 12V+ rail, 12 X .05 = .6, so the 12V rail can be anywhere between 11.4V and 12.6V, same math goes for the other rail.
After you get the voltages at idle, you can run 3Dmark06 or something to test under load, and moniter the voltages that way as well.