With the introduction of PCI-Express as the new standard slot type, most of the new graphics cards with the latest graphics chipsets, no longer support the AGP bus. ATi cards such as the X700 and X850 only come in PCI-E versions while AGP cards are getting harder to find day by day. However, Nvidia did not completely abandon the project and implemented a version of the 6600GT for the AGP bus.



Link: CDRinfo