Mantis, I figured that the drivers might be the issue but uninstalling and reinstalling did not seem to work. I reinstalled the operating system and tried the Drivers from Gigabyte supplied with the disk. They failed to load with an ATI.MDAG.SYS blue screen. This is the same error I had with the 10.6 drivers from ATI. Frustrated with the results, I downloaded the last drivers that I knew worked with my old system from ATI. The 10.4 drivers worked and the frame rates are where they should be for a single card. Gotta tell ya this was frustrating. I do not know if anyone else has reported problems like this but at least I found a temporary work around. I am going to add the second card and test for Xfire.