So I've been wanting to do this for ages and I finally have the ability to do. CROSSFIRE HO! I'm running an MSI Twin Frozr 7950 and want to crossfire it. Now I know about microstuttering, games not supporting, etcetc. But my question is this. Is it better (not necessary I know) to get the same exact card, or should I go with something a bit more powerful, in the same range? Or does it really matter?