Take it with a grain of salt, but WCCF Tech claims AMD's eight-core "Summit Ridge" high-end Zen-based Socket AM4 processors could arrive as early as October. The 8-core versions can run 16 threads and reportedly have a TDP of 95W.
This is the second major milestone that we’ve heard about concerning Zen’s development The first being the tape out of the Zen core / microarchitecture back in 2015 and the second being the tape out of the eight core Zen based SOC in January. This means that not only has the core design been finalized, but development of the first product chip with Zen cores has been completed. This is the eight core 95W Zen SOC which will be coming to the desktop later in the year. AMD has several other Zen based SOCs – systems on a chip – in development. A 32 Core Zen server CPU, a sixteen core Zen HPC APU and a quadcore Zen consumer APU. All of which should be taped out sometime later this year.