It has been reported that AMD plans to release their first FinFET based products in June. According to the source AMD’s 400 series will launch in June. The preview might happen at Computex, which starts at the end of May. So it is likely we will see a paper launch at Computex and a hard launch with reviews later in the month.
The source is also very sure that the Radeon R9 490X will be based on Polaris 10. This would mean that we would not see any Fiji to R9 490 rebranding. This brings us to two conclusions, first that the Fury X is faster than the Radeon R9 490(X) Polaris 10 card. We could see the Fury series offered along the Radeon R9 490 line till Vega becomes available. Second that the Fury X is slower than Polaris 10 and it may be used for the Radeon R9 480 series instead.
What we do know is that the Radeon R9 490 series cards are set up to compete directly with NVIDIA’s GeForce GTX 1080 / 1070 line. Now again we do not know the performance of these cards either, but if NVIDIA follows cadence the GTX 1080 / 1070 will be more powerful than the current GM200-based cards. If that is the case Polaris 10 should have performance somewhere around the GTX 980 Ti, but that is just speculation at this point.