IBM System x3650 M4 Type 7915, Installation And User Manual

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For UDIMMs, DIMM connectors 3, 6, 7, and 10 for microprocessor 1 and DIMM
connectors 15, 18, 19, and 22 for microprocessor 2 are not used.
Notes:
1. 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 slots for
microprocessor 1 are filled.
2. DIMM slots 13-24 are reserved for microprocessor 2; thus, DIMM slots 13-24
are enabled when microprocessor 2 is installed.
The following illustration shows the location of the DIMM connectors on the system
board.
DIMM 3 DIMM 9 DIMM 6 DIMM 12 DIMM 2 DIMM 8 DIMM 5 DIMM 11 DIMM 1 DIMM 7 DIMM 4 DIMM 10
CH1 Ch2 CH0 Ch3
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
CH1 Ch2 CH0 Ch3
Microprocessor 2
CPU2
DIMM installation sequence
Depending on the server model, the server may come with a minimum of one 2 GB
or 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
non-mirroring mode, all three channels on the memory interface for each
microprocessor can be populated in any order and have no matching requirements.
Important: If you have configured the server to use memory mirroring, do not use
the order in Table 8; go to “Memory mirrored channel” on page 111 and use the
installation order shown there.
Table 8. Non-mirroring (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
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System x3650 M4 Type 7915: Installation and User’s Guide