AMD's next-generation Radeon HD 7900 graphics, usually known under their Tahiti codename, have been spotted this weekend in what gives some clues as to the features inside. A large board seen by VR-Zone points to it likely having 1.5GB of RAM and a chip size similar to AMD's biggest. Although not identified by name, the part's use of two six-pin power feeds (instead of one eight and one six) may either be proof the top-end Radeon HD 7970 uses less power or else is an example of an upper mid-range chip, such as a 7950.
