The Paladin said:
when you connect 3 pin fans on 4 pin connector you have to tell your CPU about it in your bios and then your fan wont act like windmills.
With the 2 case fan headers on my MOBO that is in fact an option and has worked wonderful. But for the CPU fan it does not give the option to swap it from PWM to DC. I am running an ASUS prime b350-plus if it helps at all.