you should have 3 fan headers on the motherboard. one labeled cpu_fan, another labeled cha_fan which supports pulse width modulation(has 4 pins) and another labeled pwr_fan which does not support pwm. you could use these two fan headers in combination with 2x spiltter cables to run 4 fans, or if coolermaster have supplied adapters with the case to allow you to use molex/sata power cables, use those or a combination of the two.