https://arstechnica.com/gadgets/2019/09/amds-ryzen-9-3950x-threadripper-on-hold-until-november/

AMD announced in a surprise email today that its Ryzen 9 3950X, originally slated for launch this month, has been delayed until November, when it and new Zen 2 Threadripper CPUs will debut:

We are focusing on meeting the strong demand for our 3rd generation AMD Ryzen processors in the market and now plan to launch both the AMD Ryzen 9 3950X and initial members of the 3rd Gen AMD Ryzen Threadripper processor family in volume this November. We are confident that when enthusiasts get their hands on the world’s first 16-core mainstream desktop processor and our next-generation of high-end desktop processors, the wait will be well worth it.