Hardware requirements for EB 1.0 ??

[bovi]

Your hardware should definitely be enough to run EB. 2 GB RAM could in very rare cases be a cause of lack of performance, but most who have problems have only between 512 and 1024 MB.

Your video card should also be enough. I prefer ATI due to some unstable NVidia drivers I was the victim of, but again yours should be enough to run it if you have a good driver. You could try lower video settings and see if it makes any difference.

I think the problem is your CPU. I've got the same one, and my game also was really choppy after a while. To fix it, you need to download the latest drivers. And done.