Asus SABERTOOTH Z97 MARK 2/USB 3.1 Manual page 45

2. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port. Connect
the S/PDIF Out 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.
3. USB 3.0 connector (20-1 pin USB3_12, USB3_34)
This connector allows you to connect a USB 3.0 module for additional USB 3.0 front
or rear panel ports. With an installed USB 3.0 module, you can enjoy all the benefits of
USB 3.0 including faster data transfer speeds of up to 5Gbps, faster charging time for
USB-chargeable devices, optimized power efficiency, and backward compatibility with
USB 2.0.
These connectors are based on xHCI specification. We recommend you to install the
related driver to fully use the USB 3.0 ports under Windows
ASUS SABERTOOTH Z97 MARK 2/USB 3.1
7 or later Windows OS.
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