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• 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.
• If there are ten identical DIMMs to be installed for CPU2, and the ten DIMMs have the same Lenovo part
number, move the DIMM to be installed in slot 18 to slot 24.
Table 12. Independent mode with two processors
Total
DIMMs 24 23 22 21 20 19 18 17 16 15 14 13
2
3
4
5
6
7
8
22
9
22
10
22
11
22
12
24
22
13
24
22
14
24
22
15
24
22
16
22 21 20 19 18 17 16 15
17
22 21 20 19 18 17 16 15
18
24
22
19
24
22
20
22 21 20 19 18 17 16 15 14 13
21
24
22
22
24
22 21 20 19 18 17 16 15 14 13
23
24
22 21 20 19 18 17 16 15 14 13
24
24 23 22 21 20 19 18 17 16 15 14 13
Mirroring mode
In mirroring mode, each DIMM in a pair must be identical in size and architecture. The channels are grouped
in pairs with each channel receiving the same data. One channel is used as a backup of the other, which
provides redundancy.
Note: All DIMMs to be installed must be the same type with the same capacity, frequency, voltage, and
ranks.
The following table shows the DIMM population sequence for mirroring mode when only one processor
(CPU1) is installed.
Processor 2
17
17
20
17
20
17
20
17
15
20
17
15
20
17
15
20
17
15
20
17
15
20
17
15
20
17
15
20
17
15
20
18 17 16 15
20
18 17 16 15
20
18 17 16 15 14 13
20
18 17 16 15 14 13
20
18 17 16 15 14 13
Processor 1
12 11 10
9
8
8
8
8
8
10
8
10
8
10
8
13
10
8
13
12
10
8
13
12
10
8
13
12
10
8
12
10
8
10
9
8
10
9
8
12
10
8
12
10
8
10
9
8
10
9
8
12 11 10
9
8
12
10
9
8
12 11 10
9
8
12 11 10
9
8
.
Chapter 8
7
6
5
4
3
2
1 DIMMs
5
5
5
5
3
5
3
5
3
5
3
5
3
1
5
3
1
5
3
1
5
3
1
6
5
4
3
6
5
4
3
7
6
5
4
3
7
6
5
4
3
6
5
4
3
2
1
6
5
4
3
2
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
Hardware replacement procedures
Total
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
79
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