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Installation order: memory sparing with four processors

Memory module installation order for memory sparing with four processors installed in the server.

The following tables show the DIMM population sequence for memory sparing when four processors are installed.

  • Processors 1 and 2 are installed on the system board.

  • Processors 3 and 4 are installed in the processor and memory expansion tray.

Note

  1. When adding one or more DIMMs during a memory upgrade, you might need to remove some DIMMs that are already installed to new locations.

  2. An even number of DIMMs is required for memory sparing.

  3. This mode only applies to single-rank memory modules. When installing DIMMs consisting of more than two ranks, including dual-rank, quad-rank or octal-rank memory modules, refer to Independent memory mode instead.

Table 1. Memory sparing with four processors (processor 1 and 2)
TotalProcessor 1Processor 2Total
DIMMs123456 789101112131415161718 192021222324DIMMs
8 78 19208
10    56 78           1920    10
1256 781718 192012
14    56 78        1718 1920    14
1656 781718 192016
18    56 78910      1718 1920    18
2056 789101718 1920212220
22    56 78910      1718 19202122  22
2456 789101718 1920212224
26  3456 78910      1718 19202122  26
283456 7891015161718 1920212228
30  3456 78910    15161718 19202122  30
323456 7891015161718 1920212232
34  3456 789101112  15161718 19202122  34
363456 78910111215161718 19202122232436
38  3456 789101112  15161718 19202122232438
403456 78910111215161718 19202122232440
42123456 789101112  15161718 19202122232442
44123456 789101112131415161718 19202122232444
46123456 789101112131415161718 19202122232446
48123456 789101112131415161718 19202122232448

Related DIMM population sequences for four processor systems:

Table 2. Memory mirroring with four processors (processor 3 and 4)
TotalProcessor 3Processor 4Total
DIMMs252627282930313233343536373839404142434445464748DIMMs
8313243448
10      3132          4344    10
123132434412
14    29303132          4344    14
16293031324142434416
18    29303132        41424344    18
20293031324142434420
22    293031323334      41424344    22
2429303132333441424344454624
26    293031323334      414243444546  26
2829303132333441424344454628
30  2728293031323334      414243444546  30
322728293031323334394041424344454632
34  2728293031323334    3940414243444546  34
362728293031323334394041424344454636
38  27282930313233343536  3940414243444546  38
40272829303132333435363940414243444546474840
42  27282930313233343536  3940414243444546474842
44272829303132333435363940414243444546474844
46252627282930313233343536  3940414243444546474846
4825262728293031323334353637383940414243444546474848

Related DIMM population sequences for four processor systems: