Lenovo ThinkSystem ST550 - Page 76

• When you install DIMMs with same rank and different capacity, install the DIMM that has the highest
capacity first.
The following table shows the DIMM population sequence for independent mode when only one processor
(CPU1) is installed.
Note: If there are three identical DIMMs to be installed for CPU1, and the three DIMMs have the same
Lenovo part number, install the three DIMMs in slots 1, 2, and 3.
Table 9. Independent 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 independent mode when two processors
(CPU1 and CPU2) are installed.
Notes:
• If there are three identical DIMMs to be installed for CPU1, and the three DIMMs have the same Lenovo
part number, install the three DIMMs in slots 1, 2, and 3.
• If there are three identical DIMMs to be installed for CPU2, and the three DIMMs have the same Lenovo
part numbers, install the three DIMMs in slots 10, 11, and 12.
Table 10. Independent 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
72 ThinkSystem ST550 Setup Guide