https://www.tomshardware.com/news/amd-release-ryzen-9-3900-ryzen-5-3500x,40595.html
AMD Announces Ryzen 9 3900 and Ryzen 5 3500X | Tom's Hardware
Oct 9, 2019 - AMD announces the Ryzen 9 3900 and Ryzen 5 3500X with little fanfare, largely because you won't be able to buy them at retail.
ryzen 9 3900and 5tom samdannounces
https://www.notebookcheck.net/AMD-launches-Ryzen-9-3900-and-Ryzen-5-3500X-CPUs.437610.0.html
AMD launches Ryzen 9 3900 and Ryzen 5 3500X CPUs - Notebookcheck News
Both CPUs feature a 65 W TDP and support 24/16 PCIe 4 lanes. The Ryzen 9 3900 comes with 12 cores and 24 threads clocked at 3.1 GHz (4.3 GHz boost) and...
ryzen 9 3900and 5amdlaunches