Ok so some version of this card be slightly different , so I gather . my card -lrb- which I order from Amazon on 10\/1 roughly -rrb- be the Cayman chipset and have the 6970 bio preload on the the card by sapphire . all you have t0o do be save you bio -lrb- I get Trixx software from sapphire for free and it will ask you if you want to save you bio -rrb- and flick the switch to position 2 and pow 1536 unify shader . no further step necesarry . so to be clear this\/my version do unlock and although im not go to overclock until i get a new PSU it will overclock to better than a stock 6970 with no effort and less money . this be less than 10 % performance increase without overclock , just switch the bio , but hey its free ! the card stay very cool , I have a dell XPS 8300 stock case fan and psu -lrb- 460 watt although dell underate they power supplies -rrb- and this thing never get above 60 \* c. it fit into the case no problem , you just have to manuever it delicately . the fan get a little loud over 70 % but its really only becasue my pc be so quiet , and you really have to put it though its pace to get up to 70 % anyway -lrb- which i havent -rrb- . by the way the bio switch be miniscule , I mean tiny and its located to the right of the crossfire port . move the switch away from the crossfire port to put it into unlock position . its about 10.5-11 inch long and be really well make . Hope this help , also run Starcraft 2 at about 120 fp on ultra setting at 1440x900 , bad company 2 high setting 90 fp , crysis 1\/2 50-60 fp -lrb- all use frap and 1440x900 re . -rrb- bf3 beta look great and run with zero stutter although the beta be completly unreliable for fp benchmark . also get a free copy of Deus ex and Dirt 3 which you have to jump through hoop for but if you have a iphone or a webcam just take a picture of the box and they will email you the Steam code . Hope to see you on the battlefield ! Dell XPS 8300 i7-2600@3.4 sandy bridge 8 gb ram @ 13xx blu-ray player sapphire hd6950 2gb unlock to 6970 20 Inch LG monitor 1440x900 , 20 Inch Dell 1440x900 Logitech Extreme 3D pro joystick bose surrond