AMD says that developers need to get a better handle on Ryzen
 

Performance differences are more of a software issue

As the reviews of Ryzen came out, it is pretty clear that there are some test scenarios where Intel chips work slightly better, and AMD claims that is due to coding problems.

John Taylor, CVP of Marketing at AMD, told PCPer that developers simply aren't used to AMD Ryzen yet. He said to fix this problem AMD's seeding of a targeted 1000+ developer systems in 2017 will help address the performance anomaly.

http://fudzilla.com/news/processors/...andle-on-ryzen