This year I intend to be doing a lot of Fire Simulation modelling with free CFD programs. (http://fire.nist.gov/fds/)
Anyhow, it requires a fast CPU which I have but I could do with beefing the RAM and card up.
Unfortunatly, I only have a nVidia 5200 so anything above would be nice.
RAM is PC3200 (400MHz) and 2 sticks of 512Mb would be nice. (Even pointing me in the direction of a nice deal if needed?)
Machine is slightly OC'd and running on Linux.