1. Installing Internal Optional Devices
Express5800/R120h-1M User’s Guide
70
Chapter 2 Preparations
1.10
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.
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 3072GB (128 GB x 24) can be installed in 2-CPU configuration. Up to 1536
GB (128 GB x 12) can be installed in 1-CPU configuration. No DIMM is factory
installed in standard configuration.
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.
For the information corresponding to all the types, all the types are referred to as DIMM. If you specify LRDIMM
or RDIMM, the information is applicable only to the type. It is necessary that the type of all of the memory installed
on the server is the same.
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.
Maximum supported memory size
The maximum available memory size on the server depends on the architecture and OS specs.
Maximum memory sizes
OS
The maximum
memory size
supported on each
OS
The maximum memory size supported
on the server
Microsoft Windows Server 2012 R2 Standard *1
Microsoft Windows Server 2012 R2 Datacenter *1
4TB 3.0TB
Microsoft Windows Server 2016 Standard *1
Microsoft Windows Server 2016 Datacenter *1
24TB 3.0TB
VMware ESXi 6.0 *2
6TB
3.0TB
VMware ESXi 6.5 *3
12TB
3.0TB
*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
