Asus P4GD1 - Manual (Page 31)

A S U S P 4 G D 1 A S U S P 4 G D 1 A S U S P 4 G D 1 A S U S P 4 G D 1 A S U S P 4 G D 1 2 - 1 1 2 - 1 1 2 - 1 1 2 - 1 1 2 - 1 1
4. When the fan and heatsink assembly is in place, connect the CPU fan
cable to the connector on the motherboard labeled CPU_FAN.
Do not forget to connect the CPU fan connector! Hardware monitoring
errors can occur if you fail to plug this connector.
P4GD1
P4GD1 CPU Fan connector
CPU_FAN
GND
Rotation
+12V
3. Push down the locks on the retention mechanism to secure the
heatsink and fan to the module base.
When secure, the retention locks should point to opposite directions.