NEC Express5800 A2040b Configuration Manual page 23

CONFIGURATION GUIDE
Summary
Available Memory
Available Memory
3
Channel
Maximum Memory
Capacity 4
Data Correction
Notes
3
4 memory channels per Memory Riser Card
4
All DIMMs have the same capacity
Customized Configuration Service (at the Server Delivery)
Product Name/Description
Customized Service: Distribution Mode for COPT
NOTE:

This service can be ordered only for A2040b COPT Model and up to one item (service) can be ordered
per one server.

With this service, according to the change of the location of MR, memory location can be changed from
the standard BTO Configuration.

When allocating enabled CPU cores to all CPU (distributed), this service is recommended to use so that
MR and Memory can be distributed, too. Please refer to "Memory" of "Reference" section for the details.
NEC Corporation
–
NEC Express5800/A2040b, A2020b, A2010b, A1040b
Lockstep Mode (only)
2 DRAM failure
detected/corrected by
memory parallel
operation
-
4
512GB(8GB RDIMM)
1024GB(16GB RDIMM)
2048GB(32GB LRDIMM)
4096GB(64GB LRDIMM)
ECC, DDDC
 RDIMM and LRDIMM
cannot be mixed
Revision 7.0 – December 2014
Memory Rank Sparing
under Lockstep Mode
In case of correctable
errors, switching
spare memory rank
1/2(8GB RDIMM),
3/4(16GB RDIMM),
7/8(32GB LRDIMM) or
3/4(64GB LRDIMM)
of physical memory
4
256GB(8GB RDIMM)
768GB(16GB RDIMM)
1792GB(32GB LRDIMM)
3072GB(64GB LRDIMM)
←
 RDIMM and LRDIMM
cannot be mixed
Memory Mirroring
under Lockstep Mode
Redundant memory
to
1/2 of physical memory
4
256GB(8GB RDIMM)
512GB(16GB RDIMM)
1024GB(32GB LRDIMM)
2048GB(64GB LRDIMM)
←
 RDIMM and LRDIMM
cannot be mixed
Part Number
NE3300-SV101
23