Asus's in-house enthusiast overclocker Elmor could push the Intel 10th gen Core i9-10900K to a whopping 7.7 GHz on liquid nitrogen. The processor was running on an Asus ROG Maximum XII Apex Z490 motherboard and was paired with G.SKILL's DDR4-4000 RAM. Elmor could also push the RAM to a double data rate frequency of 6.6 GHz breaking yet another record.
https://www.notebookcheck.net/Intel-Core-i9-10900K-pushed-to-a-crazy-7-7-GHz-on-all-cores-on-liquid-helium-DDR4-memory-overclocked-to-6-6-GHz-on-Z490.465873.0.html