When the comp gets stressed, it shuts down.. I'll guess it's a heat issue and since it's a home brew, the thermal grease is frequently the cause.. Tried reapplying?
Hope this helps.
Hi, I recently built a new computer and it has a problem with random restarts and freezing.
GIGABYTE GA-EX58-UD5 Motherboard
CORSAIR CMPSU-750HX 750W Modular Power Supply
Intel Core i7-920
CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 1600 (PC3 12800) Triple Channel Kit
Western Digital Caviar Black WD6401AALS 640GB 7200 RPM SATA
SAPPHIRE VAPOR-X 100269VXL Radeon HD 4890 1GB
Running Windows 7 64bit
Nothing is overclocked, although the ram is currently in XMP mode through the motherboard.
Ran memtest for hours without any errors. Updated all drivers manually then through Driver Genius.
Motherboard bios is the most current non beta. CPU and Video card are at acceptable temps.
I can normally use the computer for hours without problem, even play high end games for hours without it freezing or restarting, but every once in a while it will just restart or freeze on me. I have disabled the option in windows that has the computer automatically restart, but it still just restarts with no error message. I have noticed though, one thing that will cause a restart regularly is if I go on the net and view a flash video (Firefox and IE). It also likes to restart when NewsBin is downloading, also sometimes when i'm quitting a game. If its just sitting in windows and not doing much, it won't freeze/restart.
I've also checked the even log and their is never any indication of what causes the problem, the only critical or warning logs are after the reboot to inform me of the unexpected reboot.
Any info/advice on the matter would be greatly appreciated.