NEC Express5800 A2040b Configuration Manual page 20

CONFIGURATION GUIDE
CPU Functions
Intel® Xeon® Processors for this server supports the following CPU functions
Category
64 bit
Power Saving
Performance
Performance
Virtualization
Security
The maximum number of logical processors supported by OS
See the table below for the maximum number of logical processors that you can actually use on your system
Maximum Number of Logical Processors Supported by Operating
Microsoft Windows Server 2008 R2 SP1 Standard
Microsoft Windows Server 2008 R2 SP1 Enterprise
Microsoft Windows Server 2008 R2 SP1 Datacenter
Microsoft Windows Server 2012 Standard
Microsoft Windows Server 2012 Datacenter
Microsoft Windows Server 2012 R2 Standard
Microsoft Windows Server 2012 R2 Datacenter
Red Hat Enterprise Linux 6 (x86_64)
Oracle Linux 6 /UEK R2 (x86_64)
VMware ESXi 5.1
VMware ESXi 5.5
1
The maximum number of logical processors when using Hyper-V are below:

Windows Server 2008 R2 SP1: 64 logical processors

Windows Server 2012, Windows Server 2012 R2 : 320 logical processors
NEC Corporation
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NEC Express5800/A2040b, A2020b, A2010b, A1040b
Function Name/Summary
Intel® 64
64 bit function
Enhanced Intel SpeedStep® Technology
(Intel® Demand Bases Switching Technology)
Technology to decrease power consumption by
adjusting voltage/clock per CPU workload
Intel® Turbo Boost Technology
Technology to boost clock frequency
Intel® Hyper-Threading Technology
Technology to use one core as two threads
Intel® Virtualization Technology
Technology to provide hardware (CPU) support for
processor virtualization
Execute Disable
Technology to avoid the execution of malware utilizing
buffer over flow error
Systems
Revision 7.0 – December 2014
Xeon
E7-4809v2
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Maximum
Logical
Supported
Server
1
256
120
1
640
120
160
120
160
120
160
120
320
120
CPU
Xeon
E7-4890v2,E7-4870v2
E7-4860v2,E7-4830v2
E7-4820v2
E7-8891v2,E7-8893v2
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Number of
Processors
by this
20