Memory Clock - NEC Express5800 A2040b Configuration Manual

CONFIGURATION GUIDE

Memory Clock

DDR3 Memory clock depends on CPU, Memory Configuration, System BIOS settings. Please refer below for
the maximum clock. Please refer to "Memory" of "Reference" section for the details.
CPU
Xeon®
E7-4890v2
E7-4870v2
E7-4860v2
E7-8891v2
E7-8893v2
Xeon®
E7-4830v2
E7-4820v2
Xeon®
E7-4809v2
NOTE:

Default Memory voltage setting (at the server delivery) is 1.35V (power saving). Memory voltage can be
changed by System BIOS Set-up menu.

At Lockstep mode, strongly recommends to change memory voltage to 1.5V by BIOS set-up menu.

Memory voltage is automatically 1.5V under the following configuration (cannot set 1.35V)

64GB LRDIMM installed
NEC Corporation
–
NEC Express5800/A2040b, A2020b, A2010b, A1040b
Memory
Configuration/Mode
Independent Mode
Lockstep Mode
Independent Mode
Lockstep Mode
Independent Mode
Lockstep Mode
Revision 7.0 – December 2014
Memory Type DIMMs (per
1CPU)
RDIMM(8, 16GB) Up to 16
LRDIMM (32GB)
Up to 16
LRDIMM (64GB)
Up to 16
RDIMM (8, 16GB)
Up to 16
LRDIMM (32GB)
Up to 16
LRDIMM (64GB)
Up to 16
RDIMM(8, 16GB)
Up to 16
LRDIMM (32GB)
Up to 16
LRDIMM (64GB)
Up to 16
RDIMM (8, 16GB)
Up to 16
LRDIMM (32GB)
Up to 16
LRDIMM (64GB)
Up to 16
RDIMM(8, 16GB) Up to 16
LRDIMM (32GB)
Up to 16
LRDIMM (64GB)
Up to 16
RDIMM (8, 16GB)
Up to 16
LRDIMM (32GB)
Up to 16
LRDIMM (64GB)
Up to 16
Clock
No. of
1.35V
1333 MHz
1333 MHz
-
1333 MHz
1333 MHz
-
1066 MHz
1066 MHz
-
1333 MHz
1333 MHz
-
1066 MHz
1066 MHz
-
1333 MHz
1333 MHz
-
1.5V
1333 MHz
1333 MHz
1066 MHz
1600 MHz
1600 MHz
1066 MHz
1066 MHz
1066 MHz
1066 MHz
1600 MHz
1600 MHz
1066 MHz
1066 MHz
1066 MHz
1066 MHz
1333 MHz
1333 MHz
1066 MHz
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