ASROCK 990FX Extreme9 User Manual page 42

Serial port Header
(9-pin COM1)
(see p.14 No. 31)
Consumer Infrared Module Header
(4-pin CIR1)
(see p.14 No. 27)
This COM1 header supports a
serial port module.
This header can be used to
1
connect the remote
GND
IRTX
IRRX
controller receiver.
ATX+5VSB
42