Lenovo 3057 Maintenance Manual page 113

The following table explains 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.
Note: All memory modules to be installed on a server must be the same type (LV RDIMM, RDIMM, or
UDIMM) with the same rank, voltage, and frequency.
Figure 59. CPU1 DIMMs
Table 2. Memory module installation rules for servers with one microprocessor
CPU1 DIMM
One DIMM
Two DIMMs
Three DIMMs
Four DIMMs
Six DIMMs
A1 A2
X
X
X
X X
X X
B1 B2
X
X
X
X X
.
Chapter 6 Installing, removing, or replacing hardware
C1 C2
X
X
X X
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