If you’re water cooling a PC, it’s generally accepted that you need some interface between the coolant and the chips — a water block of copper or aluminum that carries the heat-removing fluid. That’s what [TrashBench] asked with his direct water cooling experiment. Instead of integrated pump or copper water block, he just epoxied a 3D printed pipe fitting onto his bare GPU and CPU. People have been dunking computers in oil for years, but the fact that he sees such a difference between CPU and GPU is quite interesting. In any case, if he continues his direct cooling experiments he’s still going to need a radiator, and if we may be so bold, we would like to recommend a giant metal snake.