I have a Sapphire X800GTO AGP 256mb.
It's unlocked to 16 pipes and overclocked to 425/550mhz.
Runs great, no artifacts.
It's the same card as the PCI-E GTO2 but with a PCI-E to AGP bridge.
As the guys said, read the stuff on the Techpowerup site, the bootable ISO is even available on one of the pages of the X800GTO AGP unlocking thread on the Video messageboard.
