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Table 1. Memory module installation rules for servers with one microprocessor
CPU1 DIMM
A1
1 DIMM
X
2 DIMMs
X
4 DIMMs
X
8 DIMMs
X
The following table provides information about the memory module installation rules for servers that have
two microprocessors (CPU1 and CPU2) installed. The "X" mark indicates the memory slots into which the
memory modules should be installed in different situations.
Table 2. Memory module installation rules for servers with two microprocessors
A1
A2
2 DIMMs
X
4 DIMMs
X
8 DIMMs
X
16 DIMMs
X
X
The following section explains the memory module installation rules in independent mode, mirroring mode,
sparing mode, and lockstep mode.
Memory module installation order in independent mode
In independent mode, the RAS features are not available. For more information about the RAS features,
refer to the related section in "Features" on page 7.
Notes:
• All memory modules to be installed must be the same type.
• When you install memory modules with different capacity, install the memory module that has the
highest capacity first.
The following table explains the memory module installation order for servers that have only one
microprocessor (CPU1) installed.
Table 3. 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 4. Memory module installation order in independent mode for servers with two microprocessors
DIMM installation order
64
ThinkServer RD350G User Guide and Hardware Maintenance Manual
A2
B1
X
X
X
X
CPU1 DIMM
B1
B2
C1
C2
D1
X
X
X
X
X
X
X
A1
A2
B1
5
1
CPU1 DIMM
A1
A2
B1
B2
C1
1
9
3
11
5
B2
C1
X
X
X
D2
A1
A2
B1
X
X
X
X
X
X
X
X
B2
C1
2
6
3
C2
D1
D2
A1
A2
13
7
15
2
10
C2
D1
X
X
X
CPU2 DIMM
B2
C1
C2
D1
X
X
X
X
X
X
X
C2
D1
7
4
CPU2 DIMM
B1
B2
C1
C2
4
12
6
14
D2
X
D2
X
X
X
D2
8
D1
D2
8
16
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