46 Sun Fire 280R Server Service Manual • January 2001
How to Install a Memory Module
Memory modules for this system are next generation dual inline memory modules
(DIMMs). Each DIMM group must contain four DIMMs of equal density (for
example, four 128-Mbyte DIMMs installed in group 0, or four 128-Mbyte DIMMs
installed in group 1). Supported DIMM configuration options are 128, 256, 512, and
1024 Mbytes. See the Sun Fire 280R Server Owner’s Guide for more information.
Configuration Rules
The following memory configuration rules apply to your system:
■ At least one memory group (all four slots in either group 0 or group 1) must be
filled for the system to boot.
■ DIMMs must be added four at a time within the same group.
■ DIMM capacities can differ from one group to the next; for example, you can
install four 128-Mbyte DIMMs in group 0 and four 512-Mbyte DIMMs in group 1.
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