Asus PRIME Z590M-PLUS Manual page 29

13. COM Port header
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.
14. Front Panel Audio header
The front panel audio header is for a chassis-mounted front panel audio I/O module
that supports HD Audio. Connect one end of the front panel audio I/O module cable to
this header.
We recommend that you connect a high-definition front panel audio module to this
connector to avail of the motherboard's high-definition audio capability.
PRIME Z590M-PLUS
COM
PIN 1
1-17