It might sound sad, but other than the Radeon R9 290X graphics card, Advanced Micro Devices hasn't actually made anything new for the RX collection.
Verily, we've already seen that, barring the new and interesting cooler shroud, the AMD Radeon R7-260X is just a relabeled Radeon HD 7790, albeit possibly featuring a better "Curacao" or "Bonaire XTX" chip.
Now, we find out something similar
about the Radeon R9 280X, that it is a rebranded Radeon HD 7970 GHz Edition. Possibly with a better GPU clock.
Rather disappointing, but it fits AMD's decision to move away from the age-old Radeon HD formula.
That said, Hawaii Pro and Hawaii XT GPUs will appear in October, so some better R9-series boards could make their debut then. Only non-reference designs will be available, as opposed to the 290X, which will be tightly controlled by Advanced Micro Devices.