I am trying to run Civ 4 on a 1.5 GHz Pentium with Geforce FX 5200 with 128 MB of video ram and 1 GB of system ram. I have tried using the latest 81.85 drivers, the beta "81.87" drivers, and the old 71.84 drivers. I get maybe 2 turns before I get excessive lag and the occasional crash to desktop for good measure. Although I am running the game fine on a Sony Vaio with a 32 MB ATI Mobility card and 768 MB of system ram... There is definitely some up with this card. I may have tried almost every "workaround" provided in the forums. It is very frustrating to not see anything from Firaxis or Take two that addresses the continuing problems that people are having with their software. I can see now why the PC gaming market is dieing a rapid death and that consoles are gaining.