According to AnandTech...
Think I'll save up for a PCI-E system though.
The 7800GTX has a little brother, 7800GT, which will also launch and ship next week. Our sources indicate there will be copious amounts of PCIe 7800GT cards first, and AGP versions will follow much later. Like with other recent video card launches, the AGP cards will also probably carry a premium at first.
Think I'll save up for a PCI-E system though.