Siberian

How would I know what kind of GPU my CPU can handle without hampering it?

I've pretty much decided to go with either two HD 4870 or two GTX260 of some kind, using SLI. Together with the rest of my specs below could someone give me a ballpark figure on FPS? CPU: AMD X2 6400+ 3.21 GHz RAM: 3 GB DDR2 Power: 600 W Main board: M2N32-SLI I'm running XP by the way.

So I'm considering GPUs to upgrade to. I'm thinking around GTX 260. I see there are many cards with this name and I'm unsure what to look for. For instance, what is the better of these two: http://www.gainward.com/main/vgapro.php?id=116 http://www.gainward.com/main/vgapro.php?id=106 Is the first better solely due to more MBs, or are there other things that are equally important?

I'd like someone to comment on my specs. I think the GPU is probably the weakest link as I''m having trouble playing the demo even on the lowest settings. I believe the other specs aren't optimal, but hopefully I can play on "normal" settings if I gear up the GPU? CPU: AMD X2 64 6400+ Mainboard: Asus M2N32-SLI GPU: GeForce 8600 GTS RAM: 4 GB DDR2