SYSTEM CONFIGURATION GUIDE – NEC Express5800R120f-1E
NEC Corporation Revision 6.0 – July 16, 2015 13
3/4 physical memory
(16GB DIMM)
Available Memory
Channels
All DIMMs in the
system must be
identical.
Paired DIMMs must
be identical.
Paired DIMMs must
be identical.
Maximum Memory Speed
See the table below for the actual maximum memory transfer speed in Independent Channel / Memory
Sparing Configuration.
DDR4 memory speed depends on the type of DIMMs, the native memory bus speed of the memory
controller and memory configuration. All memory buses operate at the clock frequency of the DIMM with
the lowest frequency.
RDIMM: 4, 8, 16 GB
LRDIMM: 32GB
E5-2620 v3
E5-2630 v3
E5-2630L v3
E5-2640 v3
RDIMM: 4, 8, 16 GB
LRDIMM: 32GB
E5-2650 v3
E5-2650L v3
E5-2660 v3
RDIMM: 2, 4, 8, 16 GB
LRDIMM: 32GB
Maximum Available Memory
See the table below for the maximum memory size that you can actually use on your system.
The maximum available memory is less than the maximum physical memory supported by your system
because some chipsets require PCI resource space of about 750MB. PCI resource requirements vary
depending on the type and the number of PCI cards you are using.
Maximum Memory Size Supported by Operating Systems
Microsoft Windows Server 2008 Standard (x86)
1
4 GB (HW-DEP enabled)
App. 2 GB(HW-DEP disabled)
Microsoft Windows Server 2008 R2 Standard
1
Microsoft Windows Server 2008 Enterprise (x86)
1
Microsoft Windows Server 2008 R2 Enterprise
1
Microsoft Windows Server 2012 Standard
1
Microsoft Windows Server 2012 Datacenter
1
Microsoft Windows Server 2012 R2 Standard
1
Microsoft Windows Server 2012 R2 Datacenter
1
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 6 (x86_64)
Red Hat Enterprise Linux 7
1
The maximum available memory size of Hyper-V systems are below:
- Windows Server 2008 R2 Standard : 32 GB
- Windows Server 2008 R2 Enterprise : 1 TB
- Windows Server 2012, Windows Server 2012 R2 : 4 TB
2
Up to 1TB of main memory is available to each virtual machine.
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