I was setting up Motherboard Monitor 5 on one of my computers last night and the alarm kept going off for my -12 voltage rail. It kept going out of the 5% tolerance. It got down to: -11.12 Volts at one point last night while the computer was just sitting idling... no load on it. This is almost an 8% change in the voltage. Is this normal on the -12 volt rail? All of my other rails are fine and pretty much stable within the 5% tolerance.
Can somebody please explain what these -12 and -5 volt rails are for? Should I even be concerned with them?
P3 850mhz (100fsb), 512 Micron PC133, Abit SE6, IBM Deskstar 75gxp (60 gig @ 7200rpm), Hercules 3D Prophet 2 GTS (64 meg), SB Live MP3, Pioneer 16x DVD, Asus 45x CD-Rom
Well the -12V and -5V are really unimportant railes (and to be honest I don't have a clue where they're used for). I've seen bords reporting them at -13V constantly without problems. Most motherboards don't even read those voltages.
So in my opinion you don't have to worry.
My CPU fan spins so fast that it creates a wormhole