Avalue Technology ACP-GM45DS User Manual page 22

ACP-GM45DS
2. Push down two fasteners at a time in a
diagonal sequence to secure the heatsink
and fan assembly in place.
3. Connect the CPU fan cable to the connector on the motherboard labelled
CPU_FAN1.
22
Do not forget to connect the fan cables to the fan connectors.
Insufficient air flow inside the system may damage the
motherboard components, and hardware monitoring errors can
occur if you fail to plug this connector.
These are not jumpers! DO NOT place jumper caps on the fan
connectors.