Asus M3N78 PRO - Motherboard - ATX User Manual page 60

9. Front panel audio connector (10-1 pin AAFP)
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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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 front panel audio module to this
connector, set the Front Panel Support Type item in the BIOS setup to
[HD Audio]; if you want to connect an AC'97 front panel audio module to
this connector, set the item to [AC97]. By default, this connector is set to
[HD Audio]. See section 4.4.6 Onboard Devices Configuration for details.
Chapter 2: Hardware information