According processor specifications that were leaked by Twitter user APISAK, an unnamed third party has managed to push the upcoming Intel Core i9-12900K above the 5 GHz barrier. Although the speeds did not get above 5.1 GHz, hitting 5.08 GHz is still an impressive achievement for a 16-core processor.
https://www.notebookcheck.net/Intel-Core-i9-12900K-Alder-Lake-surfaces-with-over-5-GHz-boost-clock-speeds.560394.0.html