Lenovo ThinkServer TD350 User Manual And Hardware Maintenance Manual page 99

The following table explains 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.
Note: Ensure that you observe the installation guidelines at the beginning of this topic.
Figure 47. CPU1 DIMMs and CPU2 DIMMs
Table 4. Memory module installation rules for servers with two microprocessors
A1
4 DIMMs X
8 DIMMs X
16 DIMMs 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 information about the RAS features, refer to
the related section in "Features" on page 7.
Note: All memory modules to be installed must be the same type (LRDIMM or RDIMM). It is also
recommended that all memory modules have the same frequency, voltage, and number of ranks.
The following table explains the memory module installation order for servers that have only one
microprocessor (CPU1) installed.
Table 5. Memory module installation order in independent mode for servers with one microprocessor
CPU1 DIMM A1
DIMM
1
installation order
CPU1 DIMM
A2 B1 B2
C1 C2
X
X X
X X X X
A2 B1
5 2
D1 D2 A1 A2
X
X X
X X X X X
B2 C1
6 3
CPU2 DIMM
B1 B2 D1
C1 C2
X
X X X
X X X X X
C2 D1
7 4
.
Chapter 6 Replacing hardware
D2
X
D2
8
85