DFI G5C900-B - Manual (Page 21)

COM Express Board
21
Connect the CPU fan’s cable connector to the CPU fan connector
(J1) on the board. The cooling fan will provide adequate airflow
throughout the chassis to prevent overheating the CPU and board
components.
BIOS Setting
The “PC Health Status” submenu of the BIOS will display the current
speed of the cooling fan. Refer to chapter 3 of the carrier board
manual for more information.
1
3
Ground
Power
Fan Speed
Detect
X
CPU Fan Connector
Connectors