PC was stable, froze. Now won't post.

Hello all,
I built my comp 3-5 months ago and have been runnign without issue since that time. Today my comp reset itself while I was playing a game. Assuming a CPU or GPU overheat I immediately check temps from bios / windows. My CPU was at 26C (water cooled) and my GPU was at 68C (stock air cooler). Those temps didn't stand out to me in my mind, so I just booted to windows and decided to watch a movie.

~20 minutes later the comp reset itself again.
~30 minutes later it froze.

During this freeze I popped my case cover off and started feeling parts for excessive heat. No heatsink I could find was hot enough that I couldn't leave my fingers on it.

I went to restart and the system won't post. No beeps. Case/video card fans do power up, but the monitor stays in stand-by. Removed a video card to reset CMOS and no change.

Sapphire 4870HD x2 in Xfire (one is currently removed)
G.Skill PC2-6400 2x2GB DDR2-800
Western Digital 1TB HD SATA2 7200RPM
Seasonic M12D 750W

Because the system was previously stable I'm assuming component failure, but I don't know where to start. I don't have a 2nd PC around to swap parts into for testing. Can anyone give me some guidance before I have to haul my system into a shop?


Nevermind. After pulling some RAM out and moving sockets I have determined that 1 of the sticks of RAM has burned out. Even more distressing is that when I closely inspect the functional unti of the pair, the heatsink is clearly starting to pull away from the chips, so it is just a matter of time for that part as well.
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More about stable froze post
  1. get memtest and see how everything is
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