I recently switched my Nvidia Geforce 8600 GTS for an Ati Radeon HD4850, and I dont know why, the pixels went strange, always flashing and particles of the place... This happened to me some games such as Just Cause 2, Doom 3 BFG and Dead Space. But Team Fortress 2 works fine...
I've formatted the disk, re-installed the Windows, installed the correct drivers, but the problem presists... What can I do?
Here's my specs:
Intel Core 2 Duo E2200 2.2Ghz
Gigabyte HD4850 512MB
DIMM 4GB RAM