MX945GM2
1.8.20SM Bus Connector (SM_BUS1)
1.8.21Digital Audio Connector (SPDIF_OUT1)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port(s). Connect the S/PDIF module cable to this connector, then install the module to a slot opening at the back of the system chassis.
The S/PDIF module is purchased separately.
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