Anandtech published AMD Ryzen 3000 Announced: Five CPUs, 12 Cores for $499, Up to 4.6 GHz, PCIe 4.0, Coming 7/7 A quote from the article:

Today at Computex, AMD CEO Dr. Lisa Su is announcing the raft of processors it will be launching on its new Zen 2 chiplet-based microarchitecture. Among other things, AMD is unveiling its new Ryzen 9 product tier, which it is using for its 12-core Ryzen 9 3900X processor, and which runs at 4.6 GHz boost. All of the five processors will be PCIe 4.0 enabled, and while they are being accompanied by the new X570 chipset launch, they still use the same AM4 socket, meaning some AMD 300 and 400-series motherboards can still be used. We have all the details inside.

 AMD Ryzen 3000 Announced: Five CPUs, 12 Cores for $499, Up to 4.6 GHz, PCIe 4.0, Coming 7/7