The Radeon HD 7970 GHz Edition becomes the Radeon HD 8970, the Radeon HD 7950 is morphed into the Radeon HD 8950 and the Radeon HD 7870 is rebadged into the Radeon HD 8870. Such practices are common for low-end and mainstream GPUs, but to see it happen for high-end GPUs is a real stunner.
Then there's also the Radeon HD 8350 (7350 rebrand), the Radeon HD 8400 (7400 variant), the Radeon HD 8740 (7750 rebrand), and the Radeon HD 8760 (7770 GHz Edition)
Interestingly, the lineup also includes two new 28nm GCN based parts with 384 stream processors; the Radeon HD 8670 and Radeon HD 8570. The Radeon HD 8670 has a 1GHz core, 128-bit memory bus and 2GB GDDR5 memory clocked at 4600MHz, while the 8570 has a 730MHz core, 128-bit memory bus and 2GB GDDR3 (or DDR3) clocked at 4600MHz (1800MHz for the DDR3 version).