Apparently, AMD made it easier to overclock the Ryzen 5000 CPUs, as the Geekbench tests were recorded on an iMac Pro running macOS, which are not particularly suitable for overclocking. The best results for the Ryzen 9 5950X running at 6 GHz show decent gains of 20% in single-core tests and 12% in multi-core tests over a Ryzen 9 3900X clocked at 5.9 GHz.
https://www.notebookcheck.net/AMD-Ryzen-9-5950X-overclocked-to-6-0-GHz-pops-up-in-Geekbench-tests.498211.0.html