Look into immersion cooling. There are so many people who are crazy about that. But it needs quite a lot of maintenance and when something fails, replacing something is a real pain. I'd just stick to air cooling.
I've seen that before, as others have said air cooling should be fine unless you're doing something particularly demanding.
Yeah, but who does that? Immersion cooling only makes sense if you are
really dependent on cutting down cooling costs and can actually save money by employing it. No personal user would go for immersion cooling, I guess.
Here in bitcoin land it's something people like to do for ASIC deployment in mining farms.