Igor's Lab has revealed a new OPN ID indicating a 3.5 GHz base clock and 4.8 GHz boost clock for a 16-core 32-thread Zen 3 Vermeer engineering sample. This is a 100 MHz higher boost than the current Ryzen 9 3950X, and AMD may be able to manage speeds closer to the 5 GHz mark in the retail units. It is also being rumored that AMD may change the branding to Ryzen 5000 to avoid confusion with existing Ryzen 4000 Renoir APUs for mobile and desktop.
https://www.notebookcheck.net/AMD-Ryzen-9-4950X-5950X-16C-32T-Zen-3-Vermeer-s-boost-clock-may-touch-the-5-GHz-mark-AMD-could-skip-4000-series-naming-for-desktop.483975.0.html