Well tuned to the max then. Most 2700X reviews state that there is little to benefit from manual overclocking as Precision Boost 2 is set to the optimal level. You can go higher but the performance gain is small versus the power and heat increase. I suspect Intel have taken the same approach with the 9900K.2700X comes with 1 core at 4.3 and doesn't event hit it. I wouldn't call overclock to max. The rest are working at 4ghz or lower.