There are so many rumors making the rounds about AMD's upcoming video card lineup that it's hard to get a clear picture of what's going to be launched next week. Previously it was believed that the Radeon R9 390 and Radeon R9 380 series were little more than rebrands with higher frequencies and extra memory but now FUD Zilla claims these cards are based on improved Hawaii and Tonga chip designs:
The Radeon R390 an R380 cards will be based on improved Hawaii and Tonga chips. Radeon R9 290X and 290 will be replaced by an improved Hawaii-based chip codenamed Granada that is basically improved Hawaii silicon. This is not a simple rebrand, it is an improved design, or so our sources claim, but they didn’t want discuss the details. The Radeon R9 390X and R9 390 and these cards will launch on June 18th.