AMD unveils new details on Ryzen, the new name for Zen
Ryzen to launch Q1 2017 with Naples (the server counterpart) due in Q2 2017
At least 3.4 GHz base clock on the top of the line Ryzen desktop chip
8 cores/16 threads on the high-end chips
20 MB L2 + L3 cache
Boosts in steps of 25 MHz
I'll be interested to see independent 3rd party benchmarks. So far they've only given a rather favorable Blender benchmark, which is but a single usage scenario out of hundreds, plus I never trust benchmarks performed by the manufacturer themselves. 3.4 GHz base clock is adequate but underwhelming, assuming it boosts to somewhere around 3.7 GHz. Hopefully there is enough thermal headroom to get it to 4 GHz without crazy cooling solutions, as single-threaded performance is still a big factor in many scenarios these days and clock speed is a big part of that.