Chapter 4: AMI BIOS
4-7
Hyper-Threading (ALL)
Select Enable to use Intel Hyper-Threading Technology to enhance CPU perfor-
mance. The options are Enable and Disable.
Cores Enabled
Use this feature to select the number of CPU cores to enable. Select 0 to enable
all cores.
Execute Disable Bit (Available if supported by the OS & the CPU)
Set to Enabled for Execute Disable Bit support which will allow the processor to
designate areas in the system memory where an application code can execute and
where it cannot, thus preventing a worm or a virus from ooding illegal codes to over-
whelm the processor or damaging the system during a virus attack. The options are
Enable and Disable. (Refer to Intel and Microsoft websites for more information.)
PPIN Control
Select Unlock/Enable to use the Protected-Processor Inventory Number (PPIN) in
the system. The options are Unlock/Enable and Unlock/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 Level 2 (L2) cache to improve CPU
performance. The options are Disable and Enable.
Adjacent Cache Line 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.
Note: If there is any change to this setting, you will need to power off and
reboot the system for the change to take effect. Please refer to Intel’s
web site for detailed information.
DCU Streamer Prefetcher (Available when supported by the CPU)
If this item is set to Enable, the DCU (Data Cache Unit) streamer prefetcher will
prefetch data streams from the cache memory to the DCU (Data Cache Unit) to
speed up data accessing and processing for CPU performance enhancement. The
options are Disable and Enable.
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