guys I just checked the link that jaydeejohn posted and they've released an update. Apparently those drivers when first posted have some compatibility issues with some hardware. I'm unsure of the details since I used google translate and it's not very clear what the issue was.
Anyways. I am using the beta drivers RC3 version now and I've only tested it with L4D. In the past, my frames occasionally will drop to 53 fps but now it stays stuck at 59 fps no matter what happens. I guess there is some performance gains although I'd love to unlock the FPS lock that Valve placed on this game to see how far this baby can take it.
I'm going to be trying FC2 very soon so keep an eye out. I'm hoping they will fix the stuttering issue when AA is turned on. It's especially noticable if you're driving on a car and slightly noticable when walking. I can't wait to see what happens on Vista 64bit + DX10.1 on FC2. I'm hoping for much better game play