As for the GPU temperature, there is no ATI OverDrive tab in my CCC(See first attached image)
Also if it's of any help, I've always had graphics glitches as well, with any and all drivers I've used. In a game there will be small neon green and sometimes purple spots on textures, 3D models will sometimes be disfigured, and sometimes there will be flashing lines and shapes (see the black shape in the left part of the second attached image for example). I'm not terribly annoyed by it, but I didn't know if that might provide any additional hints pointing to the source of the problem.
It never did work properly. I created this thread just a few days after the computer was shipped to me. I don't remember if I had already updated my drivers before trying out a game or not, but I did later roll back multiple times to the drivers that came on the machine, with no change. What I was trying to do at one point was install the 8.12 driver, because through a bit of research on other forums I found several cases similar to my own (with the same video card on Win7 machines) that seemed to have been solved by resorting back to that older driver. I was never able to get it to fully install on this computer, however, because upon reboot the machine automatically installs the driver that came on it when I would install an older one.
Also if it's of any help, I've always had graphics glitches as well, with any and all drivers I've used. In a game there will be small neon green and sometimes purple spots on textures, 3D models will sometimes be disfigured, and sometimes there will be flashing lines and shapes (see the black shape in the left part of the second attached image for example). I'm not terribly annoyed by it, but I didn't know if that might provide any additional hints pointing to the source of the problem.
When looking at the gpuz screenshots why are the 4 boxes not ticked under computing,open CL,CUDA,physX etc.
And i have to agree with everyone else,sounds like a duff graphics card,