My stuff showed up Monday, I'll probably put it in this weekend. My mobo has 3 memory slots, but only the first one supports PC3200, so I knew I would not be able to run at those rates.

I'm probably going to start with drivers straight from ATI, not the ones on the disk. My experience with ATI is that you definitely have to uninstall the previous drivers. Following the ATI drivers menu, they point to Catalyst 8.3 for XP and the X1650.
http://game.amd.com/us-en/drivers_ca...=xp/radeonx-xp