Question: Delid. What is that and what does it do?
TIM stands for: Thermal Interface Material. But everyone call it Thermal Paste. TIM is just a short for that.
If you take your 7700k apart you also have TIM between the CPU die and the CPU heatspreader.
Swap out the crappy TIM intel uses by doing a delid of your CPU, and use LM (Liquid Metal) like: http://www.thermal-grizzly.com/en/products/26-conductonaut-en