I went all noctua, installed all fans with anti vibtation pads and mounts. Still not as silent as I expected, any advices? Further description in comments : r/Noctua
Noctua NF A12x15 PWM FLX PC Computer Cases Towers CPU processor 12mm fan COOLERS fans Cooling fan Cooler fans|12mm fan|cooler fancooling fan - AliExpress