MSI MS-98K9 User Manual page 46

BIOS Setup
depending on the current CPU/system temperature, avoiding the overheating
to damage your system.
▶ Network Stack Configuration
This menu provides Network Stack settings for users to enable network boot
(PXE) from BIOS.
▶ PCI/PCIE Device Configuration
▶ Legacy USB Support
Set to [Enabled] if you need to use any USB 1.1/2.0 device in the operating
system that does not support or have any USB 1.1/2.0 driver installed, such
as DOS and SCO Unix.
▶ Audio Controller
This setting enables/disables the onboard audio controller.
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