An overclocker on Twitter known as @OldSKol_ has overclocked Intel Core i9-10900K, recently announced Comet Lake-S CPU to 5.4 GHz on all 10 cores of the while using a voltage of 1.35V. The chip scored over 3,000 points in Cinebench R15. By default, the CPU runs at a base clock of 3.7 GHz with a maximum boost clock of 5.3 GHz, if the chip’s boost behavior is like the last-generation chips, the 5.3 GHz boost frequency won’t apply to all CPU cores at once. With that in mind, a 5.4 GHz all-core overclock is actually quite respectable. That brings us to an important question - what was the cooling solution? We don’t know, but given that the 5.4 GHz all-core overclock was achieved with 1.35V, we think it of some kind of all-in-one liquid cooler or equally powerful custom loop, but not extreme cooling, like liquid nitrogen.