NEC Express5800/R120d-1M Configuration Guide Page 13

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CONFIGURATION GUIDE Express5800/R120d-1M
NEC Corporation Revision 1.0, March 2012
Memory Configuration Feature Comparison
See the table below for feature comparisons of memory configurations supported.
Independent
Channel
Memory
Sparing
Memory
Lockstep
Memory
Mirroring
Performance
Best
Better
Better
Good
Data Protection
No
Multiple single bit
error protection
No
Multiple single bit
and multi bit error
protection
Redundancy
No
Partly
No
Fully
Data Correction
ECC, x4 SDDC
ECC, x4 SDDC
ECC, x8 SDDC
ECC, x4 SDDC
Available Memory
Full physical
memory
2/3 physical memory
(2, 4GB DIMM)
5/6 physical memory
(8, 16GB DIMM)
Full physical
memory
Half physical
memory
Available Memory
Channels
4
4
4
4
Notes
-
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.
DDR3 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.
The maximum memory transfer rate is 1066 MHz with Memory Sparing Configuration.
Processor Type
Populated DIMMs
DIMMs per
processor
DIMM Speed
At 1.35V
At 1.5V
E5-2609
-
-
1066 MHz
1066 MHz
E5-2630L
E5-2640
UDIMM (4GB)
-
1066 MHz
1333 MHz
RDIMM (2, 4, 8, 16GB)
Up to 8 DIMMs
1333 MHz
1333 MHz
10 or more DIMMs
-
1066 MHz
LRDIMM (32GB)
Up to 8 DIMMs
1066 MHz
1333 MHz
10 or more DIMMs
1066 MHz
1066 MHz
E5-2650L
E5-2670
E5-2690
UDIMM (4GB)
-
1066 MHz
1333 MHz
RDIMM (2, 4, 8, 16GB)
Up to 8 DIMMs
1333 MHz
1600 MHz
10 or more DIMMs
-
1066 MHz
LRDIMM (32GB)
Up to 8 DIMMs
1066 MHz
1333 MHz
10 or more DIMMs
1066 MHz
1066 MHz
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