Asus Motherboard P5GC-MX - Manual (Page 24)

1-12 Chapter 1: Product introduction
• Do not forget to connect the CPU fan connector! Hardware
monitoring errors can occur if you fail to plug this connector.
• We recommend you to install the chassis fan for better thermal
state.
3. When the fan and heatsink assembly is in place, connect the CPU fan
cable to the connector on the motherboard labeled CPU_FAN.
2. Push down two fasteners at
a time in a diagonal sequence
to secure the heatsink and fan
assembly in place.
A
A B
B
B
B
A
A
P5GC-MX R
P5GC-MX CPU Fan Connector
CPU_FAN
GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM