Stefan Mileschin

AMD's approach to the next-generation product stack isn't structured too differently from that of NVIDIA's current. The company is launching just one big (high-end) chip, codenamed "Hawaii," based on which it's launching the Radeon R9 290X. It's been detailed to death in our older posts. The Radeon R9 280X, on the other hand, is we're hearing a re-badged Radeon HD 7970 GHz Edition. At the most, expect a slight clock speed bump, and a different reference-design board, but for the most part, it's shaping up to be identical. The approach draws parallels with the NVIDIA's lineup. The Radeon R9 290X is expected to compete with the GeForce GTX TITAN, R9 290 with GTX 780, and R9 280X with the GTX 770. While launch of the R9 290 series will be tightly controlled by AMD (i.e., don't expect non-reference designs for a while), the R9 280X will launch entirely by non-reference designs. The three cards will launch a little later this week.

http://www.techpowerup.com/191440/ra...z-edition.html