Owners Manual

Processor Settings
You can use the Processor Settings screen to view the processor settings, and perform specific functions such as enabling
virtualization technology, hardware prefetcher, logical processor idling, and opportunistic self-refresh.
Viewing Processor Settings
To view the Processor Settings screen, perform the following steps:
Steps
1. Turn on, or restart your system.
2. Press F2 immediately after you see the following message:
F2 = System Setup
NOTE: If your operating system begins to load before you press F2, wait for the system to finish booting, and then
restart your system and try again.
3. On the System Setup Main Menu screen, click System BIOS.
4. On the System BIOS screen, click Processor Settings.
Processor Settings details
The Processor Settings screen details provides the following options:
Option
Description
Logical
Processor
Enables or disables the logical processors and displays the number of logical processors. If this option is
set to Enabled, the BIOS displays all the logical processors. If this option is set to Disabled, the BIOS
displays only one logical processor per core. This option is set to Enabled by default.
Virtualization
Technology
Enables or disables the virtualization technology for the processor. This option is set to Enabled by
default.
Adjacent Cache
Line Prefetch
Optimizes the system for applications that need high utilization of sequential memory access. This option
is set to Enabled by default. You can disable this option for applications that need high utilization of
random memory access.
Hardware
Prefetcher
Enables or disables the hardware prefetcher. This option is set to Enabled by default.
Logical
Processor Idling
Enables you to improve the energy efficiency of a system. It uses the operating system core parking
algorithm and parks some of the logical processors in the system which in turn allows the corresponding
processor cores to transition into a lower power idle state. This option can only be enabled if the
operating system supports it. It is set to Disabled by default.
x2APIC Mode Enables or disables the x2APIC mode. This option is set to Disabled by default.
Number of Cores
per Processor
Controls the number of enabled cores in each processor. This option is set to All by default.
Processor Core
Speed
Specifies the maximum core frequency of the processor.
Processor n
NOTE: Depending on the number of CPUs, there might be up to two processors listed.
The following settings are displayed for each processor installed in the system:
Option Description
Family-Model-
Stepping
Specifies the family, model, and stepping of the processor as defined by Intel.
Brand Specifies the brand name.
34 Pre-operating system management applications