The past few days a few rumors surfaced on the web, the GeForce GTX 1080 seems to be performing seriously good and as such AMD's board partners are in a bit of a fright. It seems only mainstream products will (likely) be launched in the Computex timeframe. Meaning there is no viable answer products wise in the higher-end to enthusiast segment to compete with Nvidia.

AMD was supposed to launch their high-end class VEGA (codename) product in early 2017, as it now seems that launch is being moved forward towards October. Realistically Nvidia isn't done, the 1080 will perform very nicely but they still have 'Big' Pascal GP100 on the shelves to answer any demand. 

As the rumors goes (and they are just that) AMD decided to pull the launch of its next big silicon, Vega10 from early-2017 aunch not to October 2016. Vega10 will be the GPU that replaces the Hawaii/Grenada series. Vega should hold HBM2 memory and that's the culprit, it is just not available in volume. 

"Vega10" is lined up to replace the 390/490 series. Vega11 will replace the FIJI Fury parts. Rumors right now indicate that Vega10 has 4096 stream processors and could compete with the GeForce GTX 1080 and GTX 1070. Vega11 would feature 6144 stream processors and would be lined against the GP100 big pascal GPU (think Titan).

AMD VEGA10 now scheduled for October launch