https://www.pcgamer.com/watch-a-professional-overclocker-delid-and-sand-down-an-intel-core-i9-9900k/

YouTube via Der8auer. Click for original.

Professional overclocker Der8auer wasted no time delidding Intel's brand new 9th generation Core i9-9900K processor, a notable chip in part because it's the company's first 8-core/16-thread mainstream desktop CPU. The 9th generation Core series also marks a return to using a soldered thermal interface material (STIM) between the CPU die and integrated heatspreader (IHS), rather than a traditionally lower quality thermal grease. However, Der8auer discovered something interesting that makes him question if switching to a soldered solution was actually the best move.