In order to have productive Machine Learning and development hardware, I finally got to building a custom watercooled workstation PC. The process included research on parts and assembly for half a year, waiting on out of stock components for two months (Nvidea RTX 3080), and finally assembling and bugfixing for a week. Below you can see the build process from start to finish. I am now enjoying the final results with fast renders, high framerates and profitable hashrates.
Below you can see the complete parts list of the finished build.PCPartPicker Part List