I acquired a new network switch, which is actively cooled ​:neocat_chew_wire:​ "nah it's gonna be fine" I said as I powered it on for the first time ​:neocat_mug:​
industrial grade fan bearing noise it wasn't, indeed, fine ​:neocat_shocked:​

Anyway, I acquired a new Noctua fan ​:neocat_3c:​