I had a XFX 6600GT that brand new would look exactly like that screen shot within minutes of playing. I can't find them, but had loads of Farcry and 3dmark screenies that would look all too familiar to you. I RMA'd the card.
Unreleated, but I stayed away from 7900GT's when they first came out as they had alot of burning issues back then. Litterally hundreds of them on evga's forums in a talley thread. Also, XFX closed their forums down at that time, which I don't believe was coincidence.