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A-2 SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
Be sure to use the same type of CPUM in each pair (CPUM#0 and CPUM#1, or
CPUM#2 and CPUM#3).
■ Memory Module (DIMM)
Mount DIMMs in sets of 16 DIMMs on the CMU.
Mount memory modules of the same size and rank in each group.
■ I/O Unit (IOU)
When mounting an IOU, also mount the CMU whose component number
represents the same mounting location as the IOU.
Example: Be sure to mount IOU#1 together with CMU#1.
A.2 System Configuration
TABLE A-1 to TABLE A-3 outline the system configuration. These tables do not include
some types of back plane.
A.2.1 SPARC Enterprise M8000 Server
This model has one cabinet.
Up to four CMUs (16 CPU chips / 32 cores) and four IOUs can be mounted on this
model. A total of 32 core expansion is possible. The primary units such as the CMU,
IOU, power supply unit, and FAN unit are common among the SPARC Enterprise
servers. The model is a floor-stand type, with an equipment rack space provided at
the top. (32 cores for the SPARC64 VI processors, 64 cores for the SPARC64 VII
processors)