MSI MS-98F6 Owner's Manual page 40

BIOS Setup
▶ PCI/PCIE Device Configuration
▶ PCI Latency Timer
This item controls how long each PCI device can hold the bus before another
takes over. When set to higher values, every PCI device can conduct trans-
actions for a longer time and thus improve the effective PCI bandwidth. For
better PCI performance, you should set the item to higher values.
▶ OS Selection
Allows you to select the OS version.
[Windows 8]
[Windows 7]
▶ XHCI Mode
This setting disables/enables the USB XHCI controller. The eXtensible Host
Controller Interface (XHCI) is a computer interface specification that defines a
register-level description of a Host Controller for Universal Serial bus (USB),
which is capable of interfacing to USB 1.0, 2.0, and 3.0 compatible devices.
The specification is also referred to as the USB 3.0 Host Controller specifica-
tion.
▶ USB 2.0 (EHCI) Support
This setting disables/enables the USB EHCI controller. The Enhanced Host
Controller Interface (EHCI) specification describes the register-level interface
for a Host Controller for the Universal Serial Bus (USB) Revision 2.0.
▶ 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.
3-10
For Windows 8.X
For Windows 7