Ok so I built my computer and its components are
EVGA 680i SLI motherboard
E6600 core2 duo
8800GTS 640 gpu
GSKILL 2GB ram
So i had an error occur a while ago where i couldnt start my computer up at all. after trying to start up it would say. "HARD DISK DRIVE FAILURE, PLEASE ENTER SYSTEM RESTORE DISK AND HIT ENTER" so i did just that but i would just pop up again, so i figured since my cd drives and my hard drive arent working, it had to be something else. So I RMA'd my mobo, my computer worked fine for another 3 monthes, then the same error just occured. Could this be just chance that the same error occured. is this even a motherboard problem or could it be caused by a faulty PSU or ram becoming bad and wearing down my mother board?
The eVGA 680i mobos have been known to have SATA problems. I have a 680i and I've never had a problem - it's been an amazing board. If you know the hard drive works and you've tested it in another PC, I would RMA the mobo if you can.
Maybe you updated bios & clear cmos? Don't jump on evga bioses. Wait for 1-2 months at least. FWIW, the XFX 680i bios works BETTER than EVGA's on EVGA 680i board. There's a rather long thread about it at evga.