Soldato
Regarding the reinstallation of Windows you don't need to do that. Just create a new partition using the Windows 7 disk manager and install Windows on that instead and you can do all that without reinstalling.
It's a pain but you need to rule out software issues, also try out your card on another machine if you can. I don't think this is driver realted (a common scrap goat for when things go wrong with AMD video cards) because if it were then there would be threads all over the place with people having similar issues.
It's a pain but you need to rule out software issues, also try out your card on another machine if you can. I don't think this is driver realted (a common scrap goat for when things go wrong with AMD video cards) because if it were then there would be threads all over the place with people having similar issues.