Asus Z8NA-D6 - Motherboard - ATX User Manual page 34

3. Connect the fan cable to the 4-pin connector labeled CPU_FAN1 or
CPU_FAN2 depending on the CPU socket you install.
3. Repeat steps 1 to 3 to install the other heatsink if you have installed a second Repeat steps 1 to 3 to install the other heatsink if you have installed a second
CPU, then connect the fan cable to the other 4-pin connector.
2-14 Chapter 2: Hardware information