The COOLERMASTER HYPER 212X supports an i5-6600k up to 4.4ghz.
The COOLERMASTER HYPER 212X supports an i5-6600k up to 4.4ghz.
Because the turbo on the CPU is at 3.9, it should be possible to reach around 4.4.
It's a solid air cooler that should help maintain lower temperatures, particularly when paired with a quality thermal paste such as Artic Silver. For even better performance, water cooling systems or premium air coolers with superior fans would provide additional temperature reduction.