Installing A Dimm - Lenovo ThinkServer RD220 Hardware Maintenance Manual

Table 10. Connectors on each memory channel
Memory channel
Channel 0
Channel 1
Channel 2
The following illustration shows the memory connector layout that is associated with each microprocessor.
For example, DIMM connectors 9, 10, 11, 12, 13, 14, 15, and 16 (DIMM connectors are shown underneath
the boxes) are associated with microprocessor 2 socket (CPU2) and DIMM connectors 1, 2, 3, 4, 5, 6, 7,
and 8 are associated with microprocessor 1 socket (CPU1). The numbers within the boxes indicate the
installation sequence of the DIMM pairs. For example, the first DIMM pair (indicated within the boxes by ones
(1)) should be installed in DIMM connectors 3 and 6, which are associated with microprocessor 1 (CPU1).
Note: You can install DIMMs for microprocessor 2 as soon as you install microprocessor 2; you do not have
to wait until all of the DIMM connectors for microprocessor 1 are filled.
Figure 2. Memory connectors associated with each microprocessor
The following table lists the installation sequence for installing DIMMs in memory-mirroring mode.
Table 11. 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.
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.

Installing a DIMM

To install a DIMM, complete the following steps.
1. Read the safety information that begins on page Safety information.
DIMM connectors
1, 2, 3, 9, 10, 11
4, 5, 6, 12, 13, 14
7, 8, 15, 16
Number of installed
microprocessors
1
1
1
2
2
2
DIMM connector
3, 6
2, 5
1, 4
14, 11
13, 10
12, 9
.
Chapter 6 Removing and installing FRUs
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