I buy one of these card with the intention of unlock the shader to make it perform like a 6970 . after some struggle try to update the bio I notice some post on a forum that indicate that all I have to do be flip the bio switch over to the `` 2 '' position -lrb- towards the front of the card -rrb- . I simply change the switch and reboot and now gpu-z show it to have 1536 shader ! 6970 performance for a lot less money ! thanks Sapphire !!