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IBM NeXtScale System Planning and Implementation Guide
The following rules apply when you select the memory configuration:
Each installed processor must have at least one memory DIMM connected.
In the nx360 M4, the maximum memory speed of a configuration is the lower
of the following two values:
– The memory speed of the processor (see Table 4-4 on page 70)
– The memory speed of the DIMM (see Table 4-10 on page 76)
The server supports 1.5 V and 1.35 V DIMMs. Mixing 1.5 V and 1.35 V
DIMMs in the same server is supported. In such a case, all DIMMs operate at
1.5 V.
Mixing UDIMMs and RDIMMs is not supported.
Equally distribute DIMMs between sockets for best performance.
For optimal performance, populate the four memory channels when one
processor is installed and the eight DIMMs when two processors are
installed.
Table 4-5 lists the memory options that are available for the nx360 M4 server.
Table 4-5 Table 5. Memory options
Part
number
Feature
code
Description
Maximum
supported
Models
where used
UDIMMs
00D5012
A3QB
4GB (1x4 GB, 2Rx8, 1.35 V) PC3L-12800
CL11 ECC DDR3 1600MHz LP UDIMM
8
-
RDIMMs - 1866 MHz
00D5028
A3QF
4GB (1x4 GB, 2Rx8, 1.5 V) PC3-14900
CL13 ECC DDR3 1866MHz LP RDIMM
8
-
00D5040
A3QJ
8GB (1x8 GB, 2Rx8, 1.5 V) PC3-14900
CL13 ECC DDR3 1866MHz LP RDIMM
8
42x, 62x
00D5048
A3QL
16GB (1x16 GB, 2Rx4, 1.5 V) PC3-14900
CL13 ECC DDR3 1866MHz LP RDIMM
8
-
RDIMMs - 1600 MHz
00D5024
A3QE
4GB (1x4GB, 1Rx4, 1.35V) PC3L-12800
CL11 ECC DDR3 1600MHz LP RDIMM
8
-
46W0735
A3ZD
4GB (1x4 GB, 2Rx8, 1.35 V) PC3-12800
CL13 ECC DDR3 1600MHz LP RDIMM
8
22x
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