Lenovo ThinkServer RD350G, User Manual And Hardware Maintenance Manual

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Table 1. Memory module installation rules for servers with one microprocessor
CPU1 DIMM A1 A2 B1 B2 C1 C2 D1 D2
1 DIMM X
2 DIMMs X X
4 DIMMs X X X X
8 DIMMs X X X X X X X 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
CPU1 DIMM CPU2 DIMM
A1 A2 B1 B2 C1 C2 D1 D2 A1 A2 B1 B2 C1 C2 D1 D2
2 DIMMs X X
4 DIMMs X X X X
8 DIMMs X X X X X X X X
16 DIMMs X X X X X X X X X X X X X X 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 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 4. Memory module installation order in independent 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 3 11 5 13 7 15 2 10 4 12 6 14 8 16
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ThinkServer RD350G User Guide and Hardware Maintenance Manual