Asus P4SDR-VM User Manual page 74

USB Function [Enabled]
This motherboard supports Universal Serial Bus (USB) devices. Keep the
default setting [Enabled] if you connect USB devices. Select the setting
[Disabled] if you do not wish to use the USB feature. Configuration
options: [Disabled] [Enabled]
4.4.3.1 Onboard PCI Devices Control
Onboard AC97 Audio Controller [Enabled]
This parameter allows you to enable or disable the onboard AC97 audio
controller. Configuration options: [Disabled] [Enabled]
4-22 Chapter 4: BIOS Setup