Initial benchmark leaks of the AMD Ryzen 9 5950X show excellent leads in single-core performance over the Intel Core i9-10900K in PassMark and Geekbench 5. The scores seem to indicate anywhere between 16 to 20% benefits in single-core applications for the Ryzen 9 5950X. Even the Ryzen 5 5600X seems to have managed quite a decent lead over Intel's flagship offering.
https://www.notebookcheck.net/AMD-Ryzen-9-5950X-outpaces-Intel-Core-i9-10900K-by-up-to-20-in-leaked-single-core-tests-Ryzen-5-5600X-is-ahead-too.499411.0.html