TechPowerUp published some speculation about AMD's upcoming graphics cards:
he G200b is likely to get a competitor from AMD by March, when the company is looking to release the industry's first GPU built on the 40nm manufacturing process, the RV740. But wait, there seems to be something larger on the cards, according to the various sources Hardware-Infos got in touch with. AMD is planning the RV790 graphics processor. It will be a current-generation GPU built on the next generation 40nm manufacturing technology. There is a lot of speculation surrounding the RV790's specifications, with some of the more plausible ones hinting it has two additional SIMD clusters (960 SPs) and a total 48 texture memory units (TMUs). Both the RV740 and RV790 are slated for March, there's also a little indication of AMD using the occasion of CeBIT for its announcements and product launches.