5-7
Chapter 5: BIOS
Power Button
Function
This setting specifies the power button’s function when pressed. Option include 4
Seconds Override or
Instant Off
.
Restore on AC Power
Loss
This setting specifies what the system will do when power is restored after an AC
power loss to the system. Options include
Stay Off
(system power remains off
after power loss), Power-On (system power turns on after power loss) or Last
State (allows the system to resume its last state before the power loss).
Table 5-4. CPU Configuration sub-menu
Menu Option
Description
Socket 1/2/3/4 CPU
Information
These sub-menus, when selected, shows information on the Socket 1/Socket 2/
Socket 3/Socket 4 processors and other information including CPU Signature,
Microcode Patch, CPU Stepping, Max CPU Speed, Min CPU Speed, Processor
Cores, Intel HT Technology, Intel VT-x Technology, L1 Data Cache, L1 Code
Cache, L2 Cache and L3 Cache.
Additionally, the CPU Configuration information shows details about the CPU
Speed and 64-bit support.
This information is only readable and cannot be changed.
Clock Spread
Spectrum
This setting enables or disables spread spectrum modulation. Options are
Enabled and
Disabled
.
RTID
This setting identifies the total number of RTIDs for Local and Remote pools.
Options include
Optimal
and Alternate.
Hyper-threading
This setting is
Enabled
for Windows XP and Linux (OS optimized for
Hyper-threading technology), and Disabled for other OSes (any OS not
optimized for Hyper-threading techology). When Disabled, only one thread per
enabled core is enabled.
Active Processor
Cores
This setting selects the number of cores to enable in each processor package.
Options include
All
, 1, 2, 4 and 6.
Limit CPUID
Maximum
This setting is disabled for Windows XP. Options include Enabled or
Disabled
.
Execute Disable Bit
XD can prevent certain classes of malicious buffer overflow attacks when
combined with a supporting OS such as Windows Server 2003 SP1, Windows
XP SP2, SuSE Linux 9.2 or RedHat Enterprise 3 Update 3. Options include
Enabled
or Disabled.
Intel (R) AES-NI
This setting enables or disables the Processor Advanced Encryption Statndard
(AES) feature for the system. Options include
Enabled
or Disabled.
MLC Streamer
Prefetcher
This setting can be used to turn on/off the Mid Level Cache (L2) streamer
prefetcher. Options include
Enabled
or Disabled.
MLC Spatial Prefetch
This setting can be used to turn on/off the prefetchting of adjacent cache lines.
Options include
Enabled
or Disabled.
DCU Streamer
Prefetcher
For UP platforms, leave this option
Enabled
. For DP/MP servers, this option
may be used to tune performance to the specific application. Options are
Enabled
or Disabled.
DCU IP Prefetcher
This setting
Enables
or Disables prefetch of the next L1 line based upon
sequential load history.
Table 5-3. Boot Feature sub-menu (Continued)
Menu Option
Description
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