Noisy DDC pump with DIYINHK 18w PWM upgrade (Solved)

Swapped over the PCB from DIYINHK to upgrade my old Apple quad DDC pump. Was quiet beforehand.

(Solved)
Problem was DC signal instead of a PWM Signal from "PWM" fan headers on my Asus Impact VII ITX motherboard. Only the CPU fan header carried a PWM signal so after I plugged it in, it worked as intended and the loud noise went away.

Видео Noisy DDC pump with DIYINHK 18w PWM upgrade (Solved) канала OrangeSVTguy