@ru gonna helpme:
i m gonna helpyou if u r gonna help us.
Just kidding mate (if you are wondering, yes, i sometimes have a bad sense of humour-ignore me).
Now, follow Earnhardt's advice, make sure you clean install the latest drivers (don't think it is an AHCI driver problem but check anyway) and watch for any outdated motherboard or software driver (and update as necessary).
Maybe your problem lies in your mobo BIOS version ?
One other guy solved a similar case by replacing his power supply (psu). Are you good with your +3v, +5v and +12v psu rail voltages ? (check bios)
Or an unstable overclock perhaps ?
Test for a while and see what you can find and post it. Please give as much feedback as possible.
gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23