SYSTEM CONFIGURATION GUIDE – NEC Express5800R120f-1E
NEC Corporation Revision 6.0 – July 16, 2015 12
Minimum one memory kit per processor must be installed.
It is recommended to install memory kits in multiples of two (four identical DIMMs) for quad-channel
symmetric memory configurations to increase memory transfer speed.
When two processors are installed, balance the DIMMs across the two processors.
Mix configurations of RDIMM and LRDIMM are not supported.
At least 5 GB of memory is required for VMware ESXi™ 5.5 and VMware ESXi™ 6.0
3.2.2 Memory Sparing Configuration
Available slots: 8 per processor
Product Name / Description
32GB DDR4-2133 REG Memory Kit (2x16GB)
2 x 16GB Registered ECC DIMM, DDR4-2133(PC4-2133)
NOTE:
Minimum one memory kit per processor must be installed.
The configured memories must be identical.
When two processors are installed, balance the DIMMs across the two processors.
The logical memory capacity at the time of memory sparing becomes five-sixth physical capacity with
configurations more than 16GB DIMM.
3.2.3 Memory Mirroring / Memory Lockstep Configuration
Available slots: 8 per processor
Product Name / Description
16GB DDR4-2133 REG Memory Kit (2x8GB)
2 x 8GB Registered ECC DIMM, DDR4-2133(PC4-2133)
32GB DDR4-2133 REG Memory Kit (2x16GB)
2 x 16GB Registered ECC DIMM, DDR4-2133 (PC4-2133)
NOTE:
Minimum one memory kit per processor must be installed.
The logical memory capacity at the time of memory mirroring becomes a half of physical capacity.
3.3 Windows Server 2008 Standard
3.3.1 Independent Channel Configuration
Available slots: 1
Product Name / Description
4GB DDR4-2133 REG Memory Kit (1x4GB)
1 x 4GB Registered ECC DIMM, DDR4-2133(PC4-2133)
NOTE:
Only one Memory Kit can be installed regardless of the number of processors.
Memory Configuration Feature Comparison
See the table below for feature comparisons of memory configurations supported.
Multiple single bit
error protection
Multiple single bit
and multi bit error
protection
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