Asus Z9NA-D6 - Manual (Page 32)

2-12 Chapter 2: Hardware information
8. Connect the CPU fan cable to the connector on the motherboard labeled
CPU_FAN1 / CPU_FAN2.
DO NOT forget to connect the CPU fan connector! Hardware monitoring errors
can occur if you fail to plug this connector.
7. Close the load plate (E), and then
push the load lever (F) until it snaps
into the retention tab.
E
F