Dimm; Maximum Supported Memory Size - NEC Express5800/T120h User Manual

Chapter 2 Preparations
1.11

DIMM

Install a Dual Inline Memory Module (DIMM) to a DIMM slot on the motherboard in the server. The motherboard
provides 24 slots to install DIMMs.
The memory subsystem in this server supports LRDIMM and RDIMM.
 RDIMM offers address parity protection.
 LRDIMM supports a higher density than a single rank or dual-rank. For this reason, you can
provide higher system capacity and bandwidth by installing larger capacity DIMM.
Hereafter, the information applicable to all types is mentioned as "DIMM." If it is written LRDIMM or RDIMM, it is
the information applicable only to these types.
Memories installed to the server have to be the same type.

Maximum supported memory size

The maximum available memory size on the server depends on the architecture and OS specs.
Maximum memory sizes
Microsoft Windows Server 2012 R2 Standard *1
Microsoft Windows Server 2012 R2 Datacenter *1
Microsoft Windows Server 2016 Standard *1
Microsoft Windows Server 2016 Datacenter *1
Red Hat Enterprise Linux 7
VMware ESXi 6.0 *2
VMware ESXi 6.5 *3
*1: Shown below is the maximum memory size when Hyper-V is used:
- Windows Server 2012 R2: 4TB
*2: Up to 4 TB on virtual machine
*3: Up to 6 TB on virtual machine
Important
To avoid static electricity, see Chapter 1 (1.8Anti-static Measures) in Safety
Precautions and Regulatory Notices.
Use only the specified DIMMs. Installing a DIMM from a third party may
damage not only the DIMM but the motherboard. You will be charged to
repair failures or damages caused by the use of such products even within
the warranty period.
Tips
Up to 1536GB (64 GB x 24) can be installed in 2-CPU configuration. Up to 768 GB
(64 GB x 12) can be installed in 1-CPU configuration. No DIMM is factory installed
in standard configuration.
Important This server does not support mix of LRDIMM and RDIMM. If you allow the mix
of any combination of these DIMM, there is a possibility that the server stops
during POST.
OS
4TB
24TB
12TB
6TB
12TB
Express5800/T120h User's Guide
The maximum
memory size The maximum memory size supported
supported on each
OS
1.5TB
1.5TB
1.5TB
1.5TB
1.5TB
1. Installing Internal Optional Devices
on the server
73