Installation order

Memory modules must be installed in a specific order based on the memory configuration that you implement on your node.

The following memory configurations are available:

Independent memory mode population sequence

Table 1. DIMM installation sequence (Independent mode/normal mode)

Number of processor	Installation sequence (connectors)
Processor 1 installed	6, 3, 7, 2, 8, 1, 5, 4
Processor 1 and 2 installed	6, 14, 3, 11, 7, 15, 2, 10, 8, 16, 1, 9, 5, 13, 4, 12

Memory mirroring population sequence

Table 2. DIMM installation sequence (mirror mode/lockstep mode)

Number of processors	Installation sequence (connectors)
Processor 1 installed	(6, 7), (2, 3), (8, 1)
Processor 1 and 2 installed	(6, 7, 14, 15), (2, 3), (10, 11), (1,8), (9, 16)

If you are installing 3, 6, 9 or 12 identical DIMMs for the mirroring mode, comply with the following installation sequence to achieve the best performance.

Table 3. DIMM installation sequence (mirror mode/lockstep mode for 3, 6, 9 and 12 identical DIMMs)

Number of processors	Installation sequence (connectors)
Processor 1 installed	(6, 7, 8), (1, 2, 3)
Processor 1 and 2 installed	(6, 7, 8), (14, 15, 16), (1, 2, 3), (9, 10, 11)

Memory rank sparing population sequence

Table 4. DIMM installation sequence (sparing mode)

Number of processors	Installation sequence (connectors)
Processor 1 installed	6, 3, 7, 2, 8, 1, 5, 4
Processor 1 and 2 installed	6, 14, 3, 11, 7, 15, 2, 10, 8, 16, 1, 9, 5, 13, 4, 12

Note

Single-rank RDIMM is not supported by sparing. If you install single-rank RDIMM, it switches to the independent mode automatically.