Dimm Installation Sequence - IBM System x3550 M4 Installation And Service Manual

v DIMMs in the server must be the same type (RDIMM, UDIMM, or LRDIMM) to
v When you install one quad-rank DIMM in a channel, install it in the DIMM
Notes:
1. You can install DIMMs for microprocessor 2 as soon as you install
2. DIMM slots 13-24 are reserved for microprocessor 2; thus, DIMM slots 13-24 are
The following illustration shows the location of the DIMM connectors on the
system board.
Figure 35. DIMM connectors location

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 general, all three channels on the memory interface for each microprocessor can
be populated in any order and have no matching requirements.
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IBM System x3550 M4 Type 7914: Installation and Service Guide
ensure that the server will operate correctly.
connector furthest away from the microprocessor.
microprocessor 2; you do not have to wait until all of the DIMM slots for
microprocessor 1 are filled.
enabled when microprocessor 2 is installed.
Table 6. Normal mode DIMM installation sequence
Number of installed
microprocessor
One microprocessor
installed
Two microprocessors
installed
DIMM connector population sequence
1, 4, 9, 12, 2, 5, 8, 11, 3, 6, 7, 10
1, 13, 4, 16, 9, 21, 12, 24, 2, 14, 5, 17, 8, 20, 11, 23, 3, 15, 6, 18,
7, 19, 10, 22