User`s manual

- 27 -
(Note) This item is present only when you install a CPU that supports this feature. For more information
about Intel
®
CPUs' unique features, please visit Intel's website.
&
Limit CPUID Maximum
(Note)
Allows you to determine whether to limit CPUID maximum value. Set this item to Disabled for Windows
XP operating system; set this item to Enabled for legacy operating system such as Windows NT4.0.
(Default: Disabled)
&
Execute Disable Bit
(Note)
Enables or disables Intel
®
Execute Disable Bit function. This function may enhance protection for the
computer, reducing exposure to viruses and malicious buffer overow attacks when working with its sup-
porting software and system. (Default: Enabled)
&
IntelVirtualizationTechnology
(Note)
Enables or disables Intel
®
Virtualization Technology. Virtualization enhanced by Intel
®
Virtualization Tech-
nology will allow a platform to run multiple operating systems and applications in independent partitions.
With virtualization, one computer system can function as multiple virtual systems. (Default: Enabled)
&
Intel TXT(LT) Support
(Note)
Enables or disables Intel
®
Trusted Execution Technology (Intel
®
TXT). Intel
®
Trusted Execution Tech-
nology provides a hardware-based security foundation. (Default: Disabled)
&
VT-d
(Note)
Enables or disablesIntel
®
Virtualization Technology for Directed I/O. (Default: Enabled)
Enables or disables Intel Execute Disable Bit function. This function may enhance protection for the
computer, reducing exposure to viruses and malicious buffer overow attacks when working with its sup-
porting software and system. (Default: Enabled)
&
OSType
Allows you to select the operating system to be installed. (Default: Other OS)
&
CSM Support
Enables or disables UEFI CSM (Compatibility Support Module) to support a legacy PC boot process.

Always Enables UEFI CSM. (Default)

Never Disables UEFI CSM and supports UEFI BIOS boot process only.
This item is congurable only when OSType is set to Windows 8 or Windows 8 WHQL.
&
Boot Mode Selection
Allows you to select which type of operating system to boot.

UEFI and Legacy Allows booting from operating systems that support legacy option ROM or UEFI
option ROM. (Default)

Legacy only Allows booting from operating systems that only support legacy option ROM.

UEFI only Allows booting from operating systems that only support UEFI option ROM.
This item is congurable only when CSM Support is set to Always.
&
LANPXEBootOptionROM
Allows you to select whether to enable the legacy option ROM for the LAN controller. (Default: Disabled)
This item is congurable only when CSM Support is set to Always.