Asus Z77 Computer Hardware User Manual


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Chapter 3: BIOS setup
Chapter 3
Active Processor Cores [All]
Allows you to choose the number of CPU cores to activate in each processor package.
Conguration options: [All] or by CPU specication
Limit CPUID Maximum [Disabled]
[Enabled] Allows legacy operating systems to boot even without support for CPUs
with extended CPUID functions.
[Disabled] For Windows
®
XP OS, select this option to disable this function.
Execute Disable Bit [Enabled]
[Enabled] Enables the No-Execution Page Protection Technology.
[Disabled] Forces the XD feature ag to always return to zero (0).
Intel Virtualization Technology [Disabled]
[Enabled] Allows a hardware platform to run multiple operating systems separately
and simultaneously, enabling one system to virtually function as several
systems.
[Disabled] Disables this function.
Hardware Prefetcher [Enabled]
[Enabled] Allows a hardware platform to run multiple operating systems separately
and simultaneously, enabling one system to virtually function as several
systems.
[Disabled] Disables this function.
Adjacent Cache Line Prefetch [Enabled]
[Enabled] Allows a hardware platform to perform adjacent cache line prefetching.
[Disabled] Disables this function.
CPU Power Management Conguration
This item allows you to manage and congure the CPU’s power.
CPU Ratio [Auto]
Allows you to set the ratio between the CPU Core Clock and the BCLK Frequency. Use
<+> and <-> keys to adjust the ratio. The valid value ranges vary according to your
CPU model.
Enhanced Intel SpeedStep Technology [Enabled]
Allows you to enable or disable the Enhanced Intel
®
SpeedStep Technology (EIST).
[Disabled] The CPU runs at its default speed.
[Enabled] The operating system controls the CPU speed.
CPU C1E [Auto]
[Auto] Sets the default conguration.
[Disabled] Disables this function.
[Enabled] Enables the C1E support function. This item should be enabled in order to
enable the Enhanced Halt State.
CPU C3 Report [Auto]
Allows you to disable or enable the CPU C3 report to OS.
Conguration options: [Auto] [Disabled] [Enabled]
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