Help, System freeze when I open a game! #iATKOS #ML2

System details:



-Graphics: ATI Radeon HD 4350 (I'm using ATI4600Controller.kext, i think that is the problem)

-Motherboard: ASUS IPIBL-LB

-Sound: ALC888

-Processor: Intel Core 2 Quad Q9300 / 2.5 GHz

-OS: Mac OS X "Mountain Lion 10.8.2"



Problem:

When i open any game on my mountain lion the system freezes and i can't do anything, except move the mouse.