I have been running my 6950 2GB card for a while. I was going to move to a laptop, but I'd be out about $500 doing that to get the same performance and am honestly kind of tight on cash(budget of about $300-400). With my single 6950 I can run most games comfortably at close to ultra(usually just AA turned off) with about 50fps with a aftermarket cooler, but the fans on mine just quit working so I'm back to stock. I just want my computer to last through til the next generation consoles come out, then will probably re-build it in late 2014. My question is, for now, should I just get a second 6950 and slap some aftermarket coolers on and overclock(what I did to run at ultra on one) in crossfire or upgrade to say a later 600 series nvidia card or 7970? I've never had an sli or crossfire setup so I have no idea if there is much of a gain or if it'd be worth it for gaming and 3d modeling(minor modeling, nothing over the top).