I've been reading up on the new series of graphics cards from AMD and nVidia, and saw several posts and reviews about the gtx 670 essentially being a 680 with the eighth CUDA core cluster disabled. My question is; is it possible to enable those cores and gain the full functionality of a 680? I don't really think it is (because then why would they bother even selling it as a 670) but this has been nagging me for a few weeks now. Thanks for any responses!