Figure 35. DIMM connectors location
DIMM installation sequence
Depending on the server model, the server may come with a minimum of one 2 GB or 4 GB DIMM installed in
slot 3.
When you install additional DIMMs, install them in the order shown in the following table to optimize system
performance. In non-mirroring mode, all three channels on the memory interface for each microprocessor
can be populated in any order and have no matching requirements.
Table 16. Non-mirroring (normal) mode DIMM installation sequence
Installed microprocessor DIMM connector population sequence
Microprocessor socket 1 3, 6, 9, 2, 5, 8, 1, 4, 7
Microprocessor socket 2 12, 15, 18, 11, 14, 17, 10, 13, 16
Memory mirroring
Memory-mirroring mode replicates and stores data on two pairs of DIMMs within two channels
simultaneously. If a failure occurs, the memory controller switches from the primary pair of memory DIMMs
to the backup pair of DIMMs.
To enable memory mirroring through the Setup utility, select System Settings ➙ Memory. For more
information, see
“Using the Setup utility” on page 517. When you use the memory mirroring feature, consider
the following information:
Chapter 5. Removing and replacing components 433
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