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Is my motherboard going out?

M

morfinx

Member
Lately I've been experiencing some random video card crashes where the screen gets garbled at seemingly random intervals (http://hardforum.com/showthread.php?t=1126672). I looked at my mobo's monitoring software and it reports the 12V rail is at 11V. I thought that would be the issue, except when I used a digital multimeter and measured the 12V rail directly off of the power supply I get 12V. I think the PSU is good because measuring the +5 and +12V rails directly off of the PSU while the system is under load showed very stable voltages. Is my mobo's voltage regulators going out or just inaccurate sensors? Or could it be the video card that's going out?
 
Software monitors are not very reliable, especially some of those from the motherboard manufacturers. The DMM is the best way to check. But, for convenience, install SpeedFan, and compare it's readings to those of the DMM, then you can simply apply any error factor. If the voltages are within limits, then they have nothing to do with the video card crashes or problems.

From what I read, the artifacting in your link is often caused by the card being overclocked, even if you did not overclock it. You might try installing Coolbits or Rivatuner and backing it off a bit, and see if it helps. This area is not my forte, so only consider this a suggestion.
 
Sorry I should have been more specific. The card was and has been clocked back down to stock speeds. The voltage readings were taken from SpeedFan (my primary source). Sandra and Everest got the same results (around 11V on the 12V rail).

I'm concerned that the DMM only measures the voltage from the PSU, but not the regulated voltage coming out of the voltage regulators on the mobo.
 
A little bit of update, I just checked SpeedFan, Everest, ATI Tray Tools, and BIOS temp monitor, they all say about 11.33 - 11.43V, which is dangerously close to the +/- 5% limit (11.4V). Curiously the utility that came with the mobo reports 11.9V. Any ideas?
 
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