WCCFTECH has reported on Redditor user FR33_L35T3R posting their newly acquired Intel Core i900KS overclocking to 5.2GHz, all cores, right out of the box. See their Cinebench below:
So it would seem there is a little headroom for these premium chips after all. He did this using a ASUS ROG Maximus XI Hero Mobo, a core/cache voltage set to 1.36V, and surprisingly using 2666MHz DDR4 ram. They are planning on upgrading to 3600MHz soon though. FR33_L35T3R stated ” It’s my first own desktop PC, first CPU I ever installed and am total OC noob, definitely not deserving exclusive access to this CPU :)”
At stock settings and using a Noctua NH-D15 the CPU hit a peak temperature of 83°C. A little toasty but not too bad. Average temperature was reported as being around 75°C. As a fan(pun intended) of air cooling I find it exciting that someone is using one on a i9 9900ks but obviously liquid would probably take it higher but this is no ordinary air cooler, see below from the product page.
Something tells me that we will be seeing quite a few similar posts in the coming months as more of these reach the wild. A fast chip to be sure!