I got a 6870 like 2 months ago now... I've had nothing but problems since :P
watching videos on the net makes my video card crash, I don't get a blue screen but I get like a pattern of colours on my screen and I have to restart, pisses me off... plays games beautifully, no problems or crashes yet....
I sent it back to NCIX and they said nothing was wrong with it and sent it back to me lol... I think it's my mobo :| EVGA nforce 680i.... I think it prefers nvidea, whenever I pop the geforce 8800 ultra in (old card), works perfectly fine, can watch videos, etc...
so now I need to buy a new mobo... and I dont want to just buy one that is compatible with my q6600, I would rather spend a little more and buy an i7 and mobo :P and ram