I recently bought myself a dv4 3016tx. It has both intel hd gfx and an amd 6750m gfx. It supports graphic switching. I wanted to overclock the 6750m but whichever software i use its not possible.I tried rivatuner, msi afterburner, ATI tray tools, Gpu clock tool, AMD overdrive etc.Heard its easily possible in the new MBPs which has the same card. I would like to overclock it so that i get a good fps for the game i am currently playing mafia 2. It gets 29 fps currently. Please help..