IBM x3650 M3 Installation And User Manual page 134

The following illustration shows the memory connector layout that is associated
with each microprocessor. For example, DIMM connectors 10, 11, 12, 13, 14, 15, 16,
17, and 18 (DIMM connectors are shown underneath the boxes) are associated with
microprocessor 2 slot (CPU2) and DIMM connectors 1, 2, 3, 4, 5, 6, 7, 8, and 9 are
associated with microprocessor 1 slot (CPU1). The numbers within the boxes
indicates 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 1 and 2, which is 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 123. 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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System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide
Table 11. Connectors on each memory channel
Memory channel
Channel 0
Channel 1
Channel 2
CPU2
Table 12. 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, 9, 16, 17, and 18 are not used in memory-mirroring mode.
DIMM connectors
1, 2, 3, 10, 11, 12
4, 5, 6, 13, 14, 15
7, 8, 9, 16, 17, 18
6 5 6 5
4 4
10 11 12 13 14 15
3
1 2 1
9 8 7 6 5 4 3
Number of installed
microprocessors
1
1
1
2
2
2
16 17 18
3 CPU1
2
2 1
DIMM connector
3, 6
2, 5
1, 4
12, 15
11, 14
10, 13