I just put together a buld using the Seidon 120v. Everything looks OK and sometimes BIOS POST will start but mist of the time the system just powers off. When the BIOS does start it shows CPU overheat error, then it shuts down. The blue light on the pump comes on and the radiator fan is spinning. I've tried plugging the pump into multiple headers on the boars, including the one that the fan runs OK in. The board is an ASUS Z97-A/USB 3.1 At first I had the rad fan in CPU_FAN and the pump in CPU_OPT but like I said I've also reversed it.