I had assembled myself a PC and had used a HAF 912 cabinet along with a CM Seidon 120XL liquid cooler with the radiator rear mounted with two fans in an exhast orientation (airflow outwards).. I have two 120mm fans for intake at the front and one 120mm fan on the side for intake. There is a space for a 140mm fan at the top but no fan at the top as of now. Can you guys please tell me which will be the best way to put up the fans for optimum cooling? I'm absolutely inexperienced in liquid cooling and fans setup. So any help would be really appreciated.