ASUS A7V333 motherboard user guide
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Onboard PCI Audio [Enabled]
[Auto] allows the BIOS to detect whether you are using any audio device. If
an audio device is detected, the onboard audio controller is enabled; if no
audio device is detected, the controller is disabled. If there are conflicts with
the onboard modem/audio controller, set the appropriate field to [Disabled].
Configuration options: [Disabled] [Enabled]
4.4.3.1 Onboard PCI Devices Control