It's bareable, but that's as positive I can be. I play on 1024x768 with low settings and on a standard map moving around is very sluggish, as is unit movement and commands. But load times and waiting in between turns are actually faster than Civ3.
P4 1.7 GHz
1024 MB RAM
Geforce 5500 256 MB
I'm thinking of upgrading to a Geforce 6600. Think that will help? Or should I go for a faster processor instead? Can't by both, have to go with just one option...