"best" winXP card is tough because some games are broken when going from the nvidia 7xxx series to the 8xxx series due to the introduction of unified shaders vs the older shader model 3.0. I got a pc case recently that had a bunch of usable stuff inside, perfect for XP. Athlon II X2 4800+ running …

Sorry to necro this thread, but just wanted to add an FYI for anyone considering doing a GeForce SLI 700 series or a 900 series It does not work. Nvidia dropped support for WinXP SLI starting from the 600 series (there are some beta drivers that have it half working for 600 series cards). Last …