Gigabyte GA-H77M-HD3 - Boot Mode Selection

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BIOS Setup
& Next Boot After AC Power Loss
Normal Boot Enables normal bootup upon the return of the AC power. (Default)
Fast Boot Keeps the Fast Boot settings upon the return of the AC power.
 ThisitemiscongurableonlywhenFast Boot is set to Enabled or Ultra Fast.
& 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supportingsoftware
and system. (Default: Enabled)
& Intel Virtualization Technology
(Note)
Enables or disables Intel Virtualization Technology. Virtualization enhanced by Intel Virtualization Technology
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: Disabled)
& VT-d
(Note)
Enables or disables Intel Virtualization Technology for Directed I/O. (Default: Enabled)
& OS Type
Allows you to select the operating system to be installed. Set this item to Windows 8 for Windows 8
operating system. (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.
(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.