Lenovo ThinkServer RD440 - 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.
Figure 59. CPU1 DIMMs
Table 3. Memory module installation rules for servers with one microprocessor
CPU1 DIMM A1 A2 B1 B2 C1 C2
One DIMM X
Two DIMMs X X
Three DIMMs X X X
Four DIMMs X X X X
Six DIMMs X X X X X X
Chapter 6 . Installing, removing, or replacing hardware 101