K8T800 Pro chipsets will work as well. You're going to need a bios update though. You actually don't need a new bios on an Asus A8V Deluxe to get the system to post with an X2. You can also flash the bios before posting to the new version with a floppy disk. The new DFI NForce 3 motherboard should also be coming out soon and that'll support X2 fully right out of the box.