https://wccftech.com/intel-alder-lake-core-i9-12900k-qualification-sample-is-allegedly-able-to-achieve-a-turbo-of-5-3-ghz/

In the latest leaks, the flagship Intel 12th Gen "Alder Lake-S" Core i9-12900K is able to hit a turbo clock of 5.3 GHz and has a base clock of 3.9 GHz.

The 12th generation of Intel processors will take advantage of its Hybrid Technology which is essentially the packaging of big cores along with small cores. The big and small cores will have the same instruction sets and model-specific registers but will have different computational powers and overheads. We are looking at big cores that have higher throughput and higher clock speeds and small cores which are very power efficient. The flagship Core i9-12900K has 8 big cores and 8 little cores as well as a boost clock speed of 5.3 GHz which falls below the rumored 5.5 GHz turbo.