Extreme overclocker Elmor has successfully pushed an Intel Core i9-13900K CPU to 8.8 GHz on a single core, effectively smashing the AMD FX-8370's record of 8.7 GHz. The test rig used an Asus ROG Maximus Z790 Apex motherboard and 32 GB of DDR5-4800 RAM. https://www.notebookcheck.net/Extreme-overclocker-smashes-world-record-by-pushing-an-Intel-Core-i9-13900K-to-8-8-GHz.663273.0.html
Almost a decade those fx had some serious clock. Now seeing 13900k power draw they don't seem power hungry. But 13900k has good IPC unlike fx so IPC>clock