I have a Zotac gtx 680 reference card before which would not overclock no matter what I do , I sell that card to buy a gtx 690 but come to my sens and decide I dont game enough to justify 1000 dollar on a video card . so I serach reveiw look for best gtx 670\/680 again which would be good overclocker and this one fit the bill perfectly . I would get ASUS gtx 680 dc2 but stock on those be even worse than this card , plus its a three slot design versus this which be only a two slot a plus in my book . so the performance with boost of this card be slightly faster than reference gtx 680 in game but gtx 680 score a bit higher on 3dmarks11 at least in my case . but real world performace be identical . even compare a gtx 670 overclocked to a gtx 680 overclocked performace be always very close that why I didnt mind my `` downgrade '' from gtx 680 to gtx 670 . all in all this be best gtx 670 ATM , if you get a stable one . now go on buy one .