• If the rank of installed DIMMs is one rank, follow the installation rules listed in the following tables. If the
rank of installed DIMMs is more than one rank, follow the installation rules of independent mode.
The following table shows the DIMM population sequence for rank sparing mode when only one processor
(CPU1) is installed.
Table 15. Rank sparing mode with one processor
Total Processor 1 Total
DIMMs 12 11 10 9 8 7 6 5
4 3 2 1 DIMMs
2 6 5 2
4 8 7 6 5 4
6 8 7 6 5 4 3 6
8 10 9 8 7 6 5 4 3 8
10 10 9 8 7 6 5 4 3 2 1 10
12 12 11 10 9 8 7 6 5 4 3 2 1 12
The following table shows the DIMM population sequence for rank sparing mode when two processors
(CPU1 and CPU2) are installed.
Table 16. Rank sparing mode with two processors
Total Processor 2 Processor 1 Total
DIMMs 24 23 22 21 20 19 18 17 16 15
14 13 12 11 10 9 8 7 6 5 4 3 2 1 DIMMs
4 18 17 6 5 4
6 18 17 8 7 6 5 6
8 20 19 18 17 8 7 6 5 8
10 20 19 18 17 8 7 6 5 4 3 10
12 20 19 18 17 16 15 8 7 6 5 4 3 12
14 20 19 18 17 16 15 10 9 8 7 6 5 4 3 14
16 22 21 20 19 18 17 16 15 10 9 8 7 6 5 4 3 16
18 22 21 20 19 18 17 16 15 10 9 8 7 6 5 4 3 2 1 18
20 22 21 20 19 18 17 16 15 14 13 10 9 8 7 6 5 4 3 2 1 20
22 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 22
24 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 24
Install a DIMM
Use this information to install a DIMM.
“Read the
installation
Guidelines” on
page 41
“Power off
the server
for this task”
on page 33
“ATTENTION:
Static Sensitive Device
Ground package before opening”
on page 43
Attention:
• Disconnect all power cords for this task.
Chapter 8. Hardware replacement procedures 81
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