Asus M3A78 Pro - Manual (Page 49)

ASUS M3A78 PRO 1-37
9. Serial port connectors (10-1 pin COM1)
The connector is for a serial (COM) port. Connect the serial port module
cable to the connector, then install the module to a slot opening at the back of
the system chassis.
10. Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that
supports either High Definition Audio or AC`97 audio standard. Connect one
end of the front panel audio I/O module cable to this connector.
• We recommend that you connect a high-definition front panel audio module
to this connector to avail of the motherboard high-definition audio capability.
• If you want to connect a high-definition front panel audio module to this
connector, make sure that the Front Panel Support Type item in the BIOS
is set to [HD Audio]; if you want to connect an AC`97 front panel audio
module to this connector, set the item to [AC97]. See page 2-27 for details.
The serial port bracket (COM1) is purchased separately.