ATI RV790 (HD 4890) Is Coming, Official Confirmation
 

RV770 was one of the most successful products for AMD (ATI GPG) in the last 3 years. The introduction of this ASIC brought unprecedented gaming performance into affordable price levels. No wonder everybody is looking forward to it's refresh, including Nvidia. The slip comes from PCI-SIG (PCI Special Interest Group) website. Among the list of new ASICs AMD has submitted for PCI-Express certification includes RV790, M97 (Mobility RV740), FirePro 3D V8700 & FirePro 3D V7750 (RV740 based FirePro).

http://gpucafe.com/2009/03/its-offic...790-is-coming/