Supermicro X10DBT User Manual page 67

Chapter 4: AMI BIOS
Execute-Disable Bit (Available if supported by the OS & the CPU)
Select Enable to support Intel® Execute Disable Bit Technology, which will allow the
processor to designate areas in the system memory where an application code can
be executed and where it cannot, thus preventing a worm or a virus from flooding
illegal codes to overwhelm the processor or damage the system during an attack.
This feature is used in conjunction with the items: "Clear MCA," "VMX," "Enable
SMX," and "Lock Chipset" for Virtualization media support. The default setting is
Enable. (Refer to Intel and Microsoft websites for more information.)
Intel TXT (Trusted Execution Technology) Support
Select Enable to support Intel Trusted Execution Technology to verify the authenticity
of a platform and its operating system (OS). This feature is used in conjunction with
the items below: "Clear MCA," "Enable SMX," and "Lock Chipset" for Virtualization
media support. The options are Enable and Disable.
VMX
Select Enable to support CPU-related Virtualization. This feature is used in conjunc-
tion with the items: "Clear MCA," "Enable SMX," and "Lock Chipset" for Virtualization
media support. The options are Enable and Disable.
Enable SMX
Select Enable to support Safer Mode Extensions (SMX) which will enhance data
security in the processor. This feature is used in conjunction with the items: "Clear
MCA," "VMX," and "Lock Chipset" for Virtualization media support. The options are
Enable and Disable.
Lock Chipset
Select Enable to lock chipset register tables and set the register tables to "read-only"
to prevent new data being written into the processor to ensure system security. This
feature is used in conjunction with the items: "Clear MCA," "VMX," and "Enable
SMX" for Virtualization media support. The options are Enable and Disable.
BIST Selection
Select Enable to configure Built-In_Self_Test (BIST) settings, which will allow the
system to perform BIST testing on the processors at bootup. The options are En-
able and Disable.
Hardware Prefetcher (Available when supported by the CPU)
If this item is set to Enable, the hardware prefetcher will prefetch streams of data and
instructions from the main memory to the L2 cache to improve CPU performance.
The options are Disable and Enable.
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