Asus P5LD2-X - Manual (Page 32)

2-10 Chapter 2: Hardware information
3. 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.
B
B
A
A
A
A B
B
Do not forget to connect the CPU fan connector! Hardware monitoring
errors can occur if you fail to plug this connector.
P5LD2-X
P5LD2-X CPU Fan Connector
CPU_FAN
GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM