Ohh yes - the noise problem again - I have a total 7 fans in my case
--- 3 BIG, one of them is panaflow, another is old and NOISY...
--- power-supply (= outside of the case) fan
--- Golden orb
--- and another 2 CPU heatsink fans
I can hear my PC across my 3-room-maze-like flat 😉 - you get used to it....
But I have desinged an electronic sircut (still building it..but it works) to monitor my fans and turn them on/off as needed (when case/cpu are getting hot) = less noise