The leaked specs come from reliable source Tum Apisak on Twitter, who managed to intercept a 16-core engineering sample that is usually offered by AMD to motherboard makers for design purposes. With 3.2 GHz default clocks and boost clocks reaching 4.5 GHz, the unnamed model may turn up to be the Ryzen 9 3800X model leaked in late 2018 by AdoredTV.
https://www.notebookcheck.net/16-core-AMD-Ryzen-3000-CPU-specs-leaked.420433.0.html
They should call these Ryzen VRMRippers :D The clocks are a bit over the top if true (imo)
It's worth remembering that AMD's 7nm is a competitor to Intel's 10nm rather than Intel's 7nm, process-wise.