I've gotten three random system restarts with no warning this week. It has only happened when I have multiple applications running, including a game. The system simply restarts with no warning (I thought it was a power outage the first time).
Investigations so far:
My first thought was an overheating problem. I am not currently overclocking. So, I tested with SpeedFan.
After stressing with Prime95 for 15 minutes:
Cores: Avg 50C Highest 54C
These temperatures don't seem high to me at all, what do you guys think?
My second thought is that it might be a PSU problem. I'm inexperienced with dealing with these problems so I'm asking here. The +12V number on my SpeedFan has been acting very strange and jumping around. Its baseline is less than 1V, but when stressed with Prime95 jumps to 9V.
The Corsair 750W PSU should be plenty of juice for this minimal system, no? So, unless its just faulty, I don't see the problem. I can go get a voltameter down at Radioshack and test the voltages directly, but I've never done this and wouldn't know where to start.
What recommendations do you have on what to do next if this problem continues?