I have a DDC 3.2 pump, which should be the same DDC-1T PWM. On my Asus Hero XXII mobo, if I set 60% to 100% PWM signal range for pump use, the pump will always run at full speed. After playing with the lower, middle and upper PWM signals in the bios. 0% to 55% signal gives control from 1200 RPMs...