E P I C B o a r d E P I C - B D U 7Chapter 2 Quick Installation Guide 2-277 NC8 NC2.34 CPU Fan (CN17)GND123FAN_POWERFAN_ TACFAN_CTLGND123FAN_POWERFAN_ TACFAN_CTL4Pin Pin Name Signal type Signal Level1 GND GND2 FAN_POWER PWR +12V3 FAN_TAC IN4 FAN_CTL IN* Pin 4 is optional. If used, smart fan will be supported2.35 PS/2 Keyboard/Mouse Combo (CN18)Pin Pin Name Signal Type Signal Level1 KB_ DATA I/O +5V