The following table explains the memory module installation order for servers that have only one
microprocessor (CPU1) installed.
Table 9. Memory module installation order in sparing mode for servers with one microprocessor
CPU1 DIMM
A1
A2
B1
B2
C1
C2
D1
D2
DIMM
installation order
1
2
3
4
5
6
7
8
The following table explains the memory module installation order for servers that have two microprocessors
(CPU1 and CPU2) installed.
Table 10. Memory module installation order in sparing mode for servers with two microprocessors
CPU1 DIMM
CPU2 DIMM
A1
A2
B1
B2
C1
C2
D1
D2
A1
A2
B1
B2
C1
C2
D1
D2
DIMM
installation order
1
2
5
6
9
10
13
14
3
4
7
8
11
12
15
16
Memory module installation order in lockstep mode
In lockstep mode, the RAS features are available. For information about the RAS features, refer to the
related section in “Features” on page 7.
Note:
All memory modules to be installed must be the same type (LRDIMM or RDIMM). It is also
recommended that all memory modules have the same frequency, voltage, and number of ranks.
The following table explains the memory module installation order for servers that have only one
microprocessor (CPU1) installed.
Table 11. Memory module installation order in lockstep mode for servers with one microprocessor
CPU1 DIMM
A1
A2
B1
B2
C1
C2
D1
D2
DIMM
installation order
1
5
2
6
3
7
4
8
The following table explains the memory module installation order for servers that have two microprocessors
(CPU1 and CPU2) installed.
Table 12. Memory module installation order in lockstep mode for servers with two microprocessors
CPU1 DIMM
CPU2 DIMM
A1
A2
B1
B2
C1
C2
D1
D2
A1
A2
B1
B2
C1
C2
D1
D2
DIMM
installation order
1
9
2
10
5
13
6
14
3
11
4
12
7
15
8
16
Installing a memory module
Attention:
Do not open your server or attempt any repair before reading and understanding “Read this first: safety
information” on page iii and “Guidelines” on page 69.
Before you begin, print all the related instructions or ensure that you can view the PDF version on another
computer for reference.
Notes:
.
87
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