Hi, I've been doing some casual gaming on my Sony VAIO, but when i play League of Legends, the game automatically uses the integrated Intel HD 4000 over my Radeon 7670m card. I tried disabling HD 4000 in device manager, but all that did was to reduce my fps below 10 in game. I also used catalyst and selected high perfomance for the game, but everytime it still runs intel. help please