Asus M4A79XTD EVO/USB3 - Manual (Page 53)

ASUS M4A79XTD EVO 2-33
Chapter 2
12. Serial port connector (10-1 pin COM1)
This connector is for a serial (COM) port. Connect the serial port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
The COM module is purchased separately.
11. Optical drive audio connector (4-pin CD)
These connectors allow you to receive stereo audio input from sound sources such as a
CD-ROM, TV tuner, or MPEG card.