Notes:
• All DIMMs to be installed must be the same type with the same capacity, frequency, voltage, and ranks.
• If the rank of installed DIMMs is one rank, rank sparing mode is not supported. If the rank of installed
DIMMs is more than one rank, follow the installation rules listed in the following tables.
The following table shows the DIMM population sequence for rank sparing mode when only one processor
(CPU1) is installed.
Table 14. Rank sparing mode with one processor
Total
Processor 1
Total
DIMMs
1
2
3
4
5
6
DIMMs
1
3
1
2
3
4
2
3
2
3
4
3
4
2
3
4
5
4
5
1
2
3
4
5
5
6
1
2
3
4
5
6
6
The following table shows the DIMM population sequence for rank sparing mode when two processors
(CPU1 and CPU2) are installed.
Table 15. Rank sparing mode with two processors
Total
Processor 1
Processor 2
Total
DIMMs
1
2
3
4
5
6
7
8
9
10
11
12
DIMMs
2
3
10
2
3
3
4
10
3
4
3
4
9
10
4
5
2
3
4
9
10
5
6
2
3
4
9
10
11
6
7
2
3
4
5
9
10
11
7
8
2
3
4
5
8
9
10
11
8
9
1
2
3
4
5
8
9
10
11
9
10
1
2
3
4
5
8
9
10
11
12
10
11
1
2
3
4
5
6
8
9
10
11
12
11
12
1
2
3
4
5
6
7
8
9
10
11
12
12
Install a DIMM
Use this information to install a DIMM.
Ground package before opening”
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ThinkSystem ST550 Maintenance Manual
Summary of Contents for ThinkSystem ST550 7X09
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