I installed the driver from amd autodetect, on dxdiag it says I have a AMD RADEON HD 7900 SERIES. is it suppose to be like this? I was playing starcraft 2 on ultra, 1080p and was getting 30, 40, 50, 70 fps. sometimes lower and to the point of lag. how can i fix this? I thought the sapphire 7950hp was suppose to be overkill for starcraft 2