Since I added 2 new fans to the case, the motherboard didn't have any more system fan ports available, so I had to plug one into the pump fan port. I understand that this port is for aio coolers and always supplies max power, so if you plug a fan in the fan will always spin at full power, which I am sure is why this one fan is spinning at full power. I think I can manually change this in bios, but don't know how. my motherboard is this: https://www.newegg.com/msi-performance-gaming-x470-gaming-plus-max/p/N82E16813144266?item=9SIADJRBG86288&source=region&nm_mc=knc-googlemkp-pc&cm_mmc=knc-googlemkp-pc-_-pla-new-new-new-_-motherboards+-+amd-_-9SIADJRBG86288&gclid=Cj0KCQjwudb3BRC9ARIsAEa-vUt_ONSxFIBhFMsf3IC3IyS39HXxvUbX3C-0mP_j2g7UiQFHjWCsfxAaAgOhEALw_wcB&gclsrc=aw.ds