Lenovo ThinkServer RD630 - Manual (Page 98)

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 slot(s) into which the
memory module(s) should be installed in different situations.
Note: The installed memory modules must be the same type (LV RDIMM or RDIMM) with the same rank,
voltage, and frequency.
Figure 48. CPU1 DIMMs and CPU2 DIMMs
Table 2. Memory module installation rules for servers with two microprocessors
CPU1 DIMM CPU2 DIMM
A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 A1 A2 B1 B2 C1 C2 D1 D2
Two
DIMMs
X X
Four
DIMMs
X X X X
Six
DIMMs
X X X X X X
Eight
DIMMs
X X X X X X X X
Twelve
DIMMs
X X X X X X X X X X X X
Sixteen
DIMMs
X X X X X X X X X X X X X X X X
Twenty
DIMMs
X X X X X X X X X X X X X X X X X X X X
Note: The twenty DIMMs configuration is supported only when you are using normal RDIMMs.
86 ThinkServer User Guide