The Core i9-13900K and i5-13600K processors are part of the new Raptor Lake CPU line-up boosting up to 5.8 GHz.
OcUK Intel Raptor Lake review thread
help with overclocking I9 13900K
Intel Core i9-14900K, Core i7-14700K and Core i5-14600K Review: Raptor Lake Refreshed
13th Gen Intel Core Processors Content Creation Review
Intel Core i9-13900K Raptor Lake ES CPU on sale in China
Almost 200 Intel Core i9-13900KS processors have been tested in large scale binning test
Intel Core i9-14900K, Core i7-14700K and Core i5-14600K Review: Raptor Lake Refreshed
Intel i9-13900K & i5-13600K review: Let the CPU battle begin
Intel i9-13900K and i5-13600K Review: Say Hello to Raptor Lake - Overclockers
Intel Core i9-13900K Processor Review - Intel Back On Top - PC Perspective