Version of the drivers (old or new), dosnt matter?
I think you may need to do the simple thing. Clean isntall your Windows again.
p.s. there where some problems with the nVidia drivers when this where new board, but as far as i know it was only with SLI setup.
CPU: AMD FX-8150 MB: ASUS Crosshair V Formula DDR3: 2x4GB G.Skill Sniper DDR3-1866
GPU: ASUS 7970 SSD: 4x Corsair F3 120GB @ Raid0 PSU: SF Golden Silent 500W OS: W7 Ultimate 64bit