Asus M3A79-T Deluxe - Manual (Page 92)

3-28 Chapter 3: BIOS setup
SPDIF_OUT Mode Setting [SPDIF Output]
If your graphics card has HDMI output and needs to use SPDIF signal from the
SPDIF_Out header, you need to set to HDMI output for HDMI audio output.
Configuration options: [SPDIF Output] [HDMI Output]
Onboard 1394 [Enabled]
Allows you to enable or disable the onboard 1394 device support.
Configuration options: [Disabled] [Enabled]
Onboard Marvell LAN [Enabled]
Configuration options: [Enable] [Disabled]
Onboard Marvell LAN Boot ROM [Disabled]
This item appears only when you enable the previous item.
Configuration options: [Enable] [Disabled]
Marvell 6111 ESATA Controller [Enable]
Configuration options: [Enable] [Disabled]
Primary Display Adapter [PCI-E]
Allows you to select which graphics controller to use as the primary boot device.
Configuration options: [PCI-E] [PCI]