CERN engineer Liviu Valsan recently gave a presentation on technology and market trends for the data center. At around 2 minutes into the discussion, he brought up AMD's Zen architecture with a slide that contained some previously undisclosed details (along with a few things we already knew).
Seems like the 32 core is basically a 2x 16 core CPU in a single die with an improved interconnection between the two CPU's. It's obvious the 32 core CPU won't be for the consumer market. I assume each CPU has a quad-channel DDR4 controller, so "8-way" in total.
It's not really news, but at least we get someone to confirm AMD's 40% IPC claims who isn't working for AMD.