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The following table explains the memory module installation order for servers that have only one
microprocessor (CPU1) installed.
Table 4. Memory module installation order in independent mode for servers with one microprocessor
CPU1 DIMM
DIMM installation order
The following table explains the memory module installation order for servers that have two microprocessors
(CPU1 and CPU2) installed.
Table 5. Memory module installation order in independent mode for servers with two microprocessors
DIMM installation order
Memory module installation order in mirroring mode
This section explains the memory module installation order in mirroring mode. In this mode, the server
maintains two identical copies of all data in memory and the RAS features are available. For more information
about the RAS features, refer to the related section in "Features" on page 7.
Notes:
• In this mode, slots A1 and A2 cannot be populated.
• All memory modules to be installed on a server must be the same type (LV RDIMM, RDIMM, or UDIMM)
with the same capacity, rank, voltage, and frequency.
The following table explains the memory module installation order for servers that have only one
microprocessor (CPU1) installed.
Table 6. Memory module installation order in mirroring mode for servers with one microprocessor
CPU1 DIMM
DIMM installation order
The following table explains the memory module installation order for servers that have two microprocessors
(CPU1 and CPU2) installed.
Table 7. Memory module installation order in mirroring mode for servers with two microprocessors
DIMM installation order
Memory module installation order in sparing mode
This section explains the memory module installation order in sparing mode. The sparing mode provides
memory redundancy. In this mode, the RAS features are available. For more information about the RAS
features, refer to the related section in "Features" on page 7.
Note: All memory modules to be installed on a server must be the same type (LV RDIMM, RDIMM, or
UDIMM) with the same capacity, rank, voltage, and frequency.
A1
A2
1
4
CPU1 DIMM
A1
A2
B1
B2
1
7
3
9
A1
A2
CPU1 DIMM
A1
A2
B1
B2
1
5
B1
B2
2
5
C1
C2
A1
A2
5
11
2
8
B1
B2
1
3
C1
C2
A1
A2
2
6
.
Chapter 6
Installing, removing, or replacing hardware
C1
C2
3
6
CPU2 DIMM
B1
B2
C1
C2
4
10
6
12
C1
C2
2
4
CPU2 DIMM
B1
B2
C1
C2
3
7
4
8
89
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