Earlier quoted context omitted.
My water cooler is noisy at the fan end. How do you evade that?
If your fans are noisy buy better fans. We had some corsair fans that came with the AIO at work, replaced them with noctuas and the computer went from mildly annoying to dead silent. Though with water cooling you might also have a lot of pump noise, especially if the radiator is mounted incorrectly.
In my case I have a DDC style pump, and its very quiet after I got a car wash sponge and cut a square hole in it and put the pump inside. It looks ghetto but its inside a case so who cares.
At first I was worried about heat, but its lasted 10 years so far.