DIMM 3
DIMM 9
DIMM 6
DIMM 12
DIMM 2
DIMM 8
DIMM 5
DIMM 11
DIMM 1
DIMM 7
DIMM 4
DIMM 10
Microprocessor 1
CPU1
DIMM 15
DIMM 21
DIMM 18
DIMM 24
DIMM 14
DIMM 20
DIMM 17
DIMM 23
DIMM 13
DIMM 19
DIMM 16
DIMM 22
Microprocessor 2
CPU2
Figure 104. DIMM connectors location
DIMM installation sequence
Depending on the server model, the server may come with a minimum of one 4 GB DIMM installed in slot
1. When you install additional DIMMs, install them in the order shown in the following table to optimize
system performance.
In general, all four channels on the memory interface for each microprocessor can be populated in any order
and have no matching requirements.
Table 12. Normal mode DIMM installation sequence
Number of installed
microprocessor
DIMM connector population sequence
One microprocessor installed
1, 4, 9, 12, 2, 5, 8, 11, 3, 6, 7, 10
Two microprocessors installed
1, 13, 4, 16, 9, 21, 12, 24, 2, 14, 5, 17, 8, 20, 11, 23, 3, 15, 6, 18, 7, 19, 10, 22
For optimal performance:
Make sure all four memory channels of each microprocessor are populated. Each memory channels should
be populated with the same type and amount of memory per channel. Each microprocessor socket should
be populated with the same type and amount of memory per socket. 1DPC (one DIMM per channel) or
2DPC (two DIMM per channel) memory configuration are recommended. Unless there is a need for memory
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Lenovo System x3650 M5 Installation and Service Guide
Summary of Contents for x3650 M5
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