12 | Chapter 2: Hardware installation
BIH61-IHP User’s Manual
2�3 Fan Headers
These fan headers support cooling-fans built in the computer. The fan cable and connector may be
different according to the fan manufacturer. Connect the fan cable to the connector while matching the
black wire to pin#1.
CN27: CPU Fan Header
Pin Assignment
1
FANPWMOUT1
2
FAN1_TACH
3
FANPVOUT1
4
GND
CN28: SYSTEM Fan Header
Pin Assignment
1
FAN2_TACH
2
FANPVOUT2
3
GND