I used a NVidia TNT2 and Savage 4 card on windows 98. Its pretty slick when it works, however, the stability of the system is pretty poor when running dual monitors. But, boy, it sure makes modelling nice (and web page developemnt!). The only app I had stability problems with on dual monitors was Carrara. But is annoying enough that I have disabled dual monitors. The other thing to watch for is your system will have only a single AGP slot. The second video card MUST be PCI, which is good becasue PCI cards are usually cheaper. The second thing is that only your primary adapter will support 3D acceleration un Direct 3D (if I have read Microsoft's docs right).