Connecting The Cpu Fan Cable - Asus P4BGL-VM User Manual

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.

2.4.4 Connecting the CPU fan cable

When the fan, heatsink, and the retention mechanism are in place,
connect the CPU fan cable to the connector on the motherboard labeled
CPU_FAN.
Don't forget to connect the CPU fan connector! Hardware monitoring
errors may occur if you fail to plug this connector.
ASUS P4BGL-VM motherboard user guide
CPU Fan Connector
(CPU_FAN1)
2-9