Hello i have a problem at DX11.
when i put DX11 on i got tons of wires from an object/texture/etc,,
this happends only in DX11 and its not a problem in the game becuse i tried it both on Dirt2 and Heaven benchmark.
i have installed the latest driver from ati and still the same problem.
btw i didnt installed the xfx disc becuse it doesnt work on my computer(but it works on my brothers comp,its not a prob on the disc i think).
my comp is:
Phenom || x965 - AMD
GA-MA770 UD3 - Gigabyte
2X2GB Pi Black 800Mhz 4-4-4-12 DDR2 800Mhz - G.skill
HD5850 1024MB GDDR5 - XFX
500GB 16MB AAKS - WesternDigital
Antec 300 - 5 Fans +Moding - Antec+Scyte
550W 80PLUS CableManagment - Chieftec
22X Dual Layer DVD-RW - Samsung
non oc or something.
You may not have properly removed the drivers for your previous GPU. Download drivecleaner pro, Uninstall all your GPU drivers, run drive cleaner pro, and then reinstall your GPU drivers. It could also be that your PSU is not providing sufficient and stable power which would cause anomalies with your GPU, though I think it's much more likely that it's a driver problem.