Windows 7: Computer Freezes randomly. I cant find the issue.

On Tuesday of last week (8-21-12) I turned on my PC like i always do. after about 10 minutes of being on and me opening up Diablo 3 my computer completely froze. nothing would respond not even Ctrl+Alt+Del. So i had to hard shut down the computer. After that a few hours later it did it again. this time i was just on internet explorer.

So with me being the way i am i Reformated my computer to see if that would solve the issue. and it has not.

So everyday now that i turn on my computer it seems to randomly Freeze. I have ran a windows Memory Diagnostic. I put it on Extra with Cache on and had it run 3 passes. it took about an hour and 20 min and windows found no errors or anything. I have NO idea what could be causing this. I dont wanna spend money if i can target the problem and replace the hardware thats bad.



I built this computer myself and it has had NO issues since i built it and this time i cant figure it out myself. I have turned to Seven forums because this community has helped me in the past.

Please is there anything i can run or do to try and locate the problem? Could it be a failing power supply? the one i have in there is a 4-5 year old 1000w psu. here are my computer specs.

Case - Corsair Obsidian 800D
Mobo - Gigabyte X58A-UD3R
CPU - Intel i7 930 2.80GHz
CPU Cooler - Corsair H70 water cooler
Ram - Corsair Dominator Triple channel memory 6GB
Video Card - EVGA Nvidia GTX 570 superclocked
PSU - Ultra X3 1000w
Sound Card - Creative sound blaster X-fi Xtremegamer
DvD drive - HP dvd1270
Fan controler - Lamptron FC5
Fans - 2x 120mm push-pull for H70 cpu cooler. 2x 120mm push-pull over HDD hot swap drive bay. 1x 120mm pushing air up and out case.

anyone got any ideas?

as i was writing a reply to this post, my computer froze. When i held the power button down and it shut off, i turned it on again the computer fired up but my monitor continued to say no signal... so i held button in again and started it again and it loaded up into windows. what could cause this

It seems that this issues was my video card.

Stop overclocking!

i wasnt. the card comes stock overclocked

then stop overclocking.