Re: Need help/advice on GeForce FX 5200 128MB AGP
RCT3 has some pretty steep requirements considering the genre. In that game, everything is 3D now. There even is some use of pixel and vertex shaders (water on ponds, weather effects, etc).
You really should consider upgrading to 512 mb of RAM along with that video card. Windows XP is a memory hog, and 512 is considered a minimum even for casual gaming.