1 good card or 2 ok cards SLI/Crossfire?

The 7970 most likely will OC better and it will murder the 670 at high resolution (and has way more compute power), the 670 gives you CUDA , PhysX, TXAA, FXAA, ADap. Vsync etc and lower power draw. Both are solid buys.If you still can't decide which card to take try looking at the games that you play or specific features that you want.If cost really matter to you then you might want to go with whatever is cheaper to you.I mean honestly overall either way is a good choice and either way you should be able to play all of today's games at high/ultra settings at 1080p.Here the MSI 670 PE in action Crysis 2 Campaign MSI GTX 670 OC Test http://www.youtube.com/watch?v=BnLUJxCBZUg&feature=plcp