NEC Express5800 Series Maintenance Manual page 59

Chapter 2 Useful Features
Option
Processor Information
Processor Power
Management
DCU IP Prefetcher
DCU Streamer Prefetcher
Hardware Prefetcher
Adjacent Cache Line Prefech
Execute Disabled Bit
VT-x
Active Processor Cores
Hyper-Threading
PPIN Support
X2APIC
Parameter
–
–
Disabled Enables or disables Data Cache Unit (DCU) IP Prefetcher.
[Enabled]
Disabled Enables or disables DCU Streamer Prefetcher.
[Enabled]
Enables or disables Hardware Prefetcher.
Disabled
[Enabled]
Disabled Enables or disables the optimal access from memory to cache.
[Enabled]
Disabled Enables or disables Execute Disable Bit. This option is displayed
only when the installed processor supports this feature.
[Enabled]
Disabled Enables or disables Intel Virtualization Technology.
[Enabled]
1-[X] Specifies the number of active cores in processor.
The selectable number of cores depends on processor installed.
X denotes the maximum number of cores.
Disabled Enables or disables the feature to simultaneously execute two
threads in a single core.
[Enabled]
This option is displayed only when the installed processor
supports this feature.
[Disabled] Enables or disables Protected Processor Inventory Number
(PPIN). This option is displayed only when the installed
Enabled
processor supports this feature.
Disabled Enables or disables X2APIC feature.
[Enabled]
This item is selectable when Enabled is selected for VT-x and
VT-d.

The X2APIC feature must be enabled when using an OS
shown below:
– Windows Server 2012
– Windows Server 2012 R2

The X2APIC feature must be disabled when using an OS
shown below:
– Windows Server 2008
– Windows Server 2008 R2
See Chapter 1 Installing Windows in Installation
Guide, and determine whether this feature is
enabled or disabled according to description in
"Before Starting Setup" appropriate to your OS.
Express5800/B120f Maintenance Guide
1. System BIOS
Description
–
–
[ ]: Factory setting
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