With a base clock of just 1.8 GHz and a single-core boost speed of 4.4 GHz, the upcoming Intel Core i9-11900 processor with a TDP of 65 W can deliver the same level of single-threaded performance as the 5.3 GHz Intel Core i9-10900K. Tested on the Z490 platform, this chip should be unveiled in early 2021.
https://www.notebookcheck.net/Intel-Core-i9-11900-matches-the-Intel-Core-i9-10900K-in-single-threaded-tests-according-to-leaked-benchmarks.511051.0.html