Lenovo ThinkServer TD200x Hardware Maintenance Manual page 224

Figure 2. Memory connectors associated with each microprocessor
The following table lists the installation sequence for installing DIMMs in
memory-mirroring mode.
When you install or remove DIMMs, the server configuration information changes.
When you restart the server, the system displays a message that indicates that the
memory configuration has changed.
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ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual
1
CPU 1
2
CPU 2
Table 13. Memory-mirroring mode DIMM population sequence
DIMMs
First pair of DIMMs
Second pair of DIMMs
Third pair of DIMMs
Fourth pair of DIMMs
Fifth pair of DIMMs
Sixth pair of DIMMs
Note: DIMM connectors 7, 8, 15, and 16 are not used in memory-mirroring mode.
Number of installed
microprocessors
1
1
1
2
2
2
DIMM connector
3, 6
2, 5
1, 4
14, 11
13, 10
12, 9