My pc: Asus p9x79 deluxe - lastest bios version I7 3820 xFx hd 7950 8 GB ram Psu seasonic x750 Monitor dell u2711 , dual dvi Mice steelseri sensei. ---- I just built it for a month, all new and clean setup. I installed the lastest catalyst 12.4, the screen crashed ( there are some multicolor block appear on the top of the monitor) and it turn to black, then show "ati driver has stopped...bla..bla..". I can not do anything with this problem. I testes is problem by using screensaver, just turn it on and see the crash immidiately. After following some forums, i tried some older version, even the driver cd in the xfx box. All happens the same thing. Later that, amd and guru have the 12.6 beta , i tried and it works but i can not play counter strike source ( my favorite game ). Running game is ok, but when i join team or using video stress test, it freezes (sometimes the screen is black or vertical grey) and must be hard reset. Living with 12.6 beta, i can surf web, watch hd movie, listen to music, retouch in photoshop, shooting photo with no troubles, except my fav game. I just install catalyst only. No any CAP profile. Someone can give me some advice?? Thanks a lot.