I had my MSI K9A2 Platium running (2) galaxy GTS 250 cards using XP Pro 32-bit but I noticed these cards get hot. I tried a 120mm fan over the cards and that helped some. Something else that I've noticed is the GPU core clock throttles down while the screensaver is running.
I had a better image but lost it when I used the PSU, hard drive and DVD from this rig on another machine. This project will have to wait for some cash to buy more parts. Any idea how I'm going to solve the above two problems when I get back to this project?