Foxconn P55MX Series User Manual page 23

Speaker Connector : SPeAKeR
The speaker connector is used to connect speaker of
the chassis.
Fan Connectors : CPU_FAN, SYS_FAN1/2
There are three main fan headers on this motherboard.
The fan speed can be controlled and monitored in "PC
Health Status" section of the BIOS Setup. These fans
can be automatically turned off after the system enters
3, S4 and S5 sleeping states.
1
CPU_FAN/SYS_FAN1/2
GND
POWER
SENSE
CONTROL
16
16
1
SPKJ
EMPTY
2
NC
3
4
SPKJ
SPEAKER