I have a 1U computer I'd like to use at my desk, unfortunately, it is very noisy. It has at least one fan that pushes so much air that it sounds like an helicopter. The fan does not rattle, so the problem is not old age, lack of oil, or dust.
I understand that since it is a 1U, so very flat, it has to have smaller fans that run faster to carry the same amount of air as a 4U which can have a 12cm fan which is pretty much silent as it doesn't need to run that fast, in comparison.
All that being said, is it possible to find fans with the same size and BTU but that does not generate as much noise?