I've tried playing it again because I had upgraded my computer to 12 gigs of memory and thought it might work this time. I've updated all my drivers, downloaded the RAGE patch from AMD and validated the install on Steam. I've also tried turning my graphics down as far as possible but since they don't have a “High, Med, Low” setting I've kind of had to hit and miss. I'm not an expert on Vsync and the other options they give. I'm afraid that the problem might be that my processor isn't strong enough, though I thought it was a pretty good one and it runs other games perfectly fine. I've got some conflicting info while researching this but it sounds like my problem might also be because I have an ATI card and ID had some driver trouble with it. These are my system specs, thanks for any advice.
Processor: AMD Atholon II X4 630
Memory:12 Gigs
Windows 7 64bit
Video Card: ATI Radeon HD 5800 Series.