S SargentOcculis Honorable Nov 26, 2013 6 0 10,510 0 Jan 6, 2014 #1 I am getting a water cooling kit from corsair. The pump is powered by a 3-pin header on the motherboard. But there is no 3-pin header on the motherboard I have. Can i just plug this into the 4-pin PWM CPU header? What can I do here?