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• "Mirroring mode" on page 79
• "Rank sparing mode" on page 80
Independent mode
Independent mode provides high-performance memory capability. You can populate all channels with no
matching requirements. Individual channels can run at different DIMM timings, but all channels must run at
the same interface frequency.
Notes:
• All DIMMs to be installed must be the same type.
• 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.
Notes:
• If there are three identical DIMMs to be installed for CPU1, and the three DIMMs have the same Lenovo
part number, move the DIMM to be installed in slot 8 to slot 1.
• If there are ten identical DIMMs to be installed for CPU1, and the ten DIMMs have the same Lenovo part
number, move the DIMM to be installed in slot 6 to slot 12.
Table 11. Independent mode with one processor
Total
DIMMs
12
11
1
2
3
4
5
6
12
7
12
8
9
12
10
11
12
12
12
11
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, move the DIMM to be installed in slot 8 to slot 1.
• If there are three identical DIMMs to be installed for CPU2, and the three DIMMs have the same Lenovo
part number, move the DIMM to be installed in slot 20 to slot 13.
78
User Guide forThinkAgile HX1521-R Node ThinkAgile HX3521-G NodeThinkAgile HX5521 NodeThinkAgile HX5521-C
NodeThinkAgile HX7521 Node
Processor 1
10
9
8
8
8
10
8
10
8
10
8
10
8
10
9
8
10
8
10
9
8
10
9
8
10
9
8
7
6
5
5
5
5
5
5
5
6
5
7
6
5
6
5
7
6
5
7
6
5
7
6
5
4
3
2
1
3
3
3
1
3
1
4
3
4
3
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
Total
DIMMs
1
2
3
4
5
6
7
8
9
10
11
12
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