IBM NeXtScale System User Manual

72 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
822x

IBM NeXtScale System Specifications

General

Brand	IBM
Model	NeXtScale System
Category	Server
Language	English