A preferable (1000x) source would be an actual expert, Gamers Nexus. He reviews cooling solutions and thermal pastes probably more than anyone else, and he benchmarks many models.
The entire computer is throttled into a power consumption you can sink through air coolers. So, unless you are overclocking something, it should always be enough. That will hold until companies start to design the components specifically for water cooling.
But the people claiming it can be quieter or thinner are quite right.
Water cooling is just air cooling that moves the fan. If you have a crappy radiator, you aren’t going to get great cooling. Water is a great way to move heat, which is why we use it for cars, heating, and power production.
I wouldn’t cite LTT for much, but IIRC, that was only true to a point. The NHD-15 is great, but a lot of cases can’t fit one. Same with many other high end air coolers. It might also cool to the same temperature, but is also running the fans harder to get there.
The biggest bottleneck on both of them these days is getting the heat away from the cpu and into the cooler fast enough. Unless you’re de-lidding your cpu, using a peltier or some other lower than ambient powered cooling theres probably a negligible amount in it.
Server hardware with their 15000rpm fans will do that. We have a customer specializing in GPU intensive number crunching. They have little storage cupboards accessible from the hallway for every two person office. Their workstations sit there and the cables go through the wall to the desks.
Yes, this is the best argument in favor of air cooling. Air cooling has less points of failure.
With water cooling there’s tons of potential problems that “haha wind go brrrr cooling” just doesn’t produce: Water block gummed up with mold? Take a performance hit. Pump dead? Sucks to be you. Leak in the system? Enjoy replacing your motherboard.
Main issue you might encounter in air cooling is just “fan died, replace fan”. (Obviously not counting thermal interface materials since they are required for both cooling solutions)
There are some data centers that are water cooled though. I know OVH uses water cooling for some of its servers, and also seems to be developing immersion cooling.
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