Yesterday I had to reinstall Catalyst, and after I did, my PC crashes when I play a "heavy" game for a few minutes. Howewer it doesn't crash when I play "weak" games. The Catalyst version is same as before I reinstalled it (version 13.9). I don't think the problem comes from my PSU because I never had this problem with this PSU. I also don't think it comes from overheating because my GPU temperature doesn't go higher than before I reinstalled Catalyst.
GPU : ATI Radeon HD 4800 Series
Desktop PC running on Windows 7 64 bits
Driver installed : Catalyst 13.9
Display device : Viewsonic VP201b connected with a DVI cable.
CPU : Intel Core 2 Quad Q6600
PSU : 475W
RAM : 4GB
Message was edited by: Matt B We have updated the title of this discussion with relevant details to better describe your issue.