Lapping the CPU Die itself!
“The socket also requires to be entirely modified due to the height of the dies of the CPUs, which can end up colliding with the CPU…
AMD 3rd Gen Ryzen Threadripper 3970X / 3960X CPU Delidded, Feature Indium Solder, Gold-Plated IHS –
Source: [H]ardOCP – AMD 3rd Gen Ryzen Threadripper 3970X / 3960X CPU Delidded, Feature Indium Solder, Gold-Plated IHS –