There are a few ways to delid a CPU, but the most popular and safe modern method is to use a dedicated delidding tool. While you can get similar results with a heat gun and a razer blade ...

How far can we take this processor? Read more here ... we are hoping for more 12:00 Delidding and tools 16:10 Successful delid - some cleaning work 22:39 Delidded 12900k - direct die cooling ...