It won't work with the GART (AGP controller) driver installed. XP PRO SP1, ASUS P4C800-E DELUXE, 550w p/s, 2GB Corsair CMX512-3500C2. When I do a fresh install, instead of installing the AGP Controller driver XP installs the (also compatible) PCI Standard PCI-to-PCI bridge driver. That works, it...