We have been hearing about R420 for quite some time now and recently the name R423 has been in the headlines. As you can guess, R420 is the AGP successor to the R350 (Radeon 9800) while R423 is a PCIe version of the R420. Anandtech has stumbled across ATI's roadmaps for 2004 including information on R420/423, RV380 and even the first sightings of R480 on a roadmap.
