Asus P10S-M WS Series Instruction Manual page 38

5. Front panel audio connector (10-1 pin AAFP1)
This connector is for a chassis-mounted front panel audio I/O module that supports
either HD Audio or legacy AC`97 audio standard. Connect one end of the front panel
audio I/O module cable to this connector.
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6. System Management Bus (SMBUS) connector (5-1 pin SMBUS1)
This connector controls the system and power management-related tasks. This
connector processes the messages to and from devices rather than tripping the
individual control lines.
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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.
If you want to connect a high-definition or an AC'97 front panel audio module to this
connector, set the Front Panel Type item in the BIOS setup to [HD] or [AC97].
Chapter 1: Product Introduction