Larger fans are much easier to keep quiet. Small high speed fans are just plain old loud. Slowing the speed reduces noise, but most are still very jet sounding like.
The right, as in "so much more right it's right" way to do cooling is with water, no doubt. I'm literally running two jalapenos, one has 7 chips, two big heat sinks with two big fans, top and bottom, and runs at 75c. The other has eight chips, a little noctua fan on the top, and a H100 Corsair water cooling block on the bottom.
It runs at 45c. And dead quiet. The two fans on it run at auto speed on the radiator which is a whisper of sound.
I can't believe anyone would waste time with air and fans for anything larger than a toy rig.
C
Obviously you weren't reading. Unless you can find a waterblock for a server powersupply.
Wow a whole two jalapenos. When you get an entire office full of mining equipment come back to us and preach how much you still suggest water cooling.