Diagnosing this should be pretty easy. If this cable is the only cable on the fan, just plug in into the chassis fan slot on your motherboard, if its a second cable, just leave it unplugged and see what happens. If it does spin, plug that cable into the chassis fan slot instead of the first cable. If the fans spins but doesnt have RGB or isnt controllable or something, this cable might have to go into another chassis fan port or into a case fan controller by NZXT or something.