Chapter 4: AMI BIOS
4-7
Clock Spread Spectrum
Select Enable to allow the BIOS to monitor and attempt to reduce the level of
Electromagnetic Interference caused by the components whenever needed. The
options are
Disable
and Enable.
Cores Enabled
This feature allows the user to set the number of CPU cores to enable. Enter "0"
to enable all cores. The default setting is
0
.
Note
: To set a valid core number for your system, please refer to the
help window on the right side of the BIOS screen, which will prompt you
for a valid core number and will also provide a warning when an invalid
core number is used.
Performance/Watt
Select Power Optimized to enable Intel® Turbo Boost Technology support when
the Power Performance State-P0 has lasted more than two seconds. The options
are
Traditional
and Power Optimized.
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® Virtualization Technology (Available when supported by the CPU)
Select Enabled to support Intel Virtualization Technology, which will allow one
platform to run multiple operating systems and applications in independent parti-
tions, creating multiple "virtual" systems in one physical computer. The options
are
Enabled
and Disabled.
Hardware Prefetcher (Available when supported by the CPU)
If set to Enabled, the hardware prefetcher will prefetch streams of data and instruc-
tions from the main memory to the L2 cache to improve CPU performance. The
options are Disabled and
Enabled
.
Adjacent Cache Prefetch (Available when supported by the CPU)
Select Enable for the CPU to prefetch both cache lines for 128 bytes as comprised.
Select Disable for the CPU to prefetch both cache lines for 64 bytes. The options
are Disable and
Enable
.
