My home server's power supply, while theoretically having plenty of power for the set up, did not cope well when I increased it to 8 hard-disks, all trying to spin up at once.
While my PC does have a glass side and LED CPU fan, that's simply because the case I wanted (with a 5-1/4 inch bay for a DVD drive) wasn't available without and the fan came with the CPU.
I have thought of removing all fans and using water cooling, using something with a slow 12 or 14" fan on the heat exchanger - especially as my PC is in the living room.
Yes. My son got his previous CPU (FX-8350) up to some ridiculous speed, even with just fan cooling. Matching within a few megahertz what others were only achieving with specialised cooling.
I just stick to stock speeds, as I'm not a gamer.