AMD is poised to unleash its new Ryzen CPUs sometime in Q1 2017, and from what we've heard it's going to be at the Game Developers Conference - which kicks off on February 27, and ends on March 3.
During GDC 2016, AMD held its huge Capsaicin event, where it better detailed Polaris at the time. Now we're seeing AMD teasing an 'Optimizing for AMD Ryzen CPU (Presented by AMD)' session at GDC 2017, which teases people to "join AMD Game Engineering team members for an introduction to the recently-launched AMD Ryzen CPU".
I've heard from my industry sources that AMD will be launching Ryzen during GDC 2017, and that the 8-core/16-thread Ryzen CPU will be the star of the show. I'm expecting a better, more detailed look at their upcoming Vega graphics card, as well.