Chapter 6: UEFI BIOS
79
Cores Enabled
Use this feature to enable or disable CPU cores in the processor specified by the user. Use
the <+> key and the <-> key on the keyboard to set the desired number of CPU cores you
want to enable in a processor. Please note that the maximum of 24 CPU cores are currently
available in each CPU package. The default setting is
0
.
Monitor/Mwait
Select Enable to support Monitor and Mwait, which are two instructions in Streaming
SIMD Extension 3 (SSE3), to improve synchronization between multiple threads for CPU
performance enhancement. The options are Disable, Enable, and
Auto
.
Execute Disable Bit (Available if supported by the OS and the CPU)
Select Enable 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 flooding illegal codes to overwhelm the processor,
damaging the system during a virus attack. The options are Disable and
Enable
. (Refer to
Intel and Microsoft websites for more information.)
Intel Virtualization Technology (Available when two processors are installed on the
motherboard)
Select Enable to use Intel Virtualization Technology which will allow multiple workloads to
share the same set of common resources. On shared virtualized hardware, various workloads
(or tasks) can co-exist, sharing the same resources, while functioning in full independence
from each other, and migrating freely across multi-level infrastructures and scale as needed.
The options are Disable and
Enable
.
Note:
If a change is made to this setting, you will need to reboot the system for the
change to take effect. Refer to Intel website for detailed information.
PPIN Control
Select Unlock/Enable to use the Protected-Processor Inventory Number (PPIN) in the system.
The options are Lock/Disable and
Unlock/Enable
.
Hardware Prefetcher (Available when supported by the CPU)
If this feature is set to Enable, the hardware prefetcher will prefectch data from the main system
memory to Level 2 (L2) cache to help expedite data transaction for memory performance
enhancement. The options are
Enable
and Disable.
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
Enable
and
Disable.
Note:
Please power off and reboot the system for the changes you've made to take
effect. Please refer to Intel website for detailed information.