I have ENTHOO LUXE TEMPERED GLASS with PWM hub which was in case package and which controls chassis fans.
My MB is ROG MAXIMUS XII HERO (WI-FI). My CPU cooler Noctua NH-U14S is connected to the CPU_FAN and also I connected PWM hub into CPU_OPT and SATA 12V.

I have problem with noise of chassis coolers. I see in ASUS AI Suite 3 when my CPU fan is around 400 RPM then chassis fans are aroun 980 RPM and it is pretty loud.

I think I dont need so many RPM on chassis fans.

Any hint what to do?