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-S12A PWM Quiet Computer Fan 120mm
Cooler Master MasterBox MB530P ATX Case WITH CORSAIR H150i PRO & 9 NOCTUA FANS | eBay