Just wanted to add that I was experiencing the low FPS bit on a new iMac 27" with the HD6770 graphics unit, Win7 64 Bit, and 16GB of RAM. I tried all the lower setting and dumping the resolution way down, all to no avail. I found that 2 things really changed all the issues I was having. 1. I was playing in windowed full screen mode. I first made sure that the desktop resolution matched my game resolution. I don't know why this made a difference, but it did. My FPS jumped up by about 12 frames. I recall this happening to me in WoW a long time ago, so I tried it, and sure enough it made a difference. 2. I saw it posted either in this thread, or one of the many other threads to try the Catalyst 12.1 beta drivers. I did a full removal of the old catalyst suite, ran ccleaner to clean up any of the junk kicking around, and rebooted. Once I was back on the system I deleted every ATI/AMD folder I could find. Ran ccleaner again in the registry, and removed anything related to ATI. I then went in device manager, and removed the video card. Rebooted. When I came back into windows, it did the auto install, but this time it just called it a generic VGA adapter. I then proceeded to install the 12.1 beta, and BOOM FPS through the roof. I did turn vertical sync back on because I had read some other discussions about the GPU load/heat when it was off. I don't have any monitoring software installed currently, so I didn't want to risk running it too hot. The 60FPS that the system is basically pinned at now, is so much better than the 12-15 FPS I would get in many areas. Anyway, thanks to the person who posted the 12.1 beta drivers (wherever that was), and hope this info helps some others.