I'm running win7 Pro 64bit on the following machine
Q6600 OC'd to 3.0 Ghz
6GB DDR2 800
GTX 280 Card
Latest Nvidia Drivers
I had one game hang early on, but it may have been related to video card cooling. I added a couple of fans and modified airflow in my case and have not had any further issues.
I'll have to check frame rates whwn I get home....