I have one fan near my drive cage intaking running at normal speeds 500 during no activity but my exhaust fan in the back is CONSTANTLY going at 1891rpm and i tried plugging it into my cases included fan hub, sata power, and directly into my mobo and IT STILL GOES FULL. I dont know how to configure speedfan for my mobo and defautly is says i can only adjust my GPU fan speed. Why is this happening? i was thinking of just going ahead and buying noctua fans that have speed adapters.