Lenovo ThinkServer RD650 User Manual And Hardware Maintenance Manual page 94

The following illustration helps you to locate the memory slots on the system board. The following illustration
shows the system board with two installed microprocessors (also known as CPU).
Figure 51. Memory slots on the system board
The following table provides information about the memory module installation rules for servers that have
only one microprocessor (CPU1) 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 one microprocessor
CPU1
A1
DIMM
1 DIMM X
2 DIMMs X
4 DIMMs X
8 DIMMs X
12 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 3. Memory module installation rules for servers with two microprocessors
A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3
2
X
DIMMs
4
X
DIMMs
8
X
DIMMs
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ThinkServer RD650 User Guide and Hardware Maintenance Manual
CPU2 DIMMC1
CPU2 DIMMC2
CPU2 DIMMC3
CPU2 DIMMD1
CPU2 DIMMD2
CPU2 DIMMD3
CPU2 DIMMB3
CPU2 DIMMB2
CPU2 DIMMB1
CPU2 DIMMA3
CPU2 DIMMA2
CPU2 DIMMA1
A2 A3 B1
X
X
X X
X X X
CPU1 DIMM
X
X X
CPU1 DIMMC1
CPU1 DIMMC2
CPU1 DIMMC3
CPU1 DIMMD1
CPU1 DIMMD2
CPU1 DIMMD3
CPU1 DIMMB3
CPU1 DIMMB2
CPU1 DIMMB1
CPU1 DIMMA3
CPU1 DIMMA2
CPU1 DIMMA1
B2 B3 C1
X
X X
X X X
X
X
X X
C2 C3 D1
X
X X
X X X
CPU2 DIMM
X
X X
D2 D3
X
X X
X