IBM System x3300 M4 Installation And Service Manual page 82

v The server system board provides three memory channels for each
v The following table shows the DIMM connectors that are associated with each
v The maximum operating speed of the server is determined by the slowest
v A minimum of one DIMM must be installed for each microprocessor. For
v The server comes with a minimum of one DIMM installed in slot 1. When you
v The server supports independent mode, spare channel mode, and mirroring
v Independent mode: When you use the independent mode, install DIMMs as
v Spare channel mode: When you use the memory mirroring feature, consider the
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System x3300 M4 Type 7382: Installation and Service Guide
resources. To view the total amount of installed memory and the amount of
configured memory, run the Setup utility. For additional information, see
"Configuring the server" on page 112.
microprocessor and each memory channel supports up to two DIMMs. The
following table lists the DIMM connectors on each memory channel:
Table 7. DIMM connectors on each memory channel
Microprocessor Channel 0
Microprocessor 1 DIMM connectors 1
and 2
Microprocessor 2 DIMM connectors 7
and 8
microprocessor:
Table 8. DIMM connectors associated with each microprocessor
Microprocessor
Microprocessor 1
Microprocessor 2
DIMM installed in the server.
example, you must install a minimum of two DIMMs if the server has two
microprocessors installed. That is, one for microprocessor 1 and one for
microprocessor 2.
install additional DIMMs, install them in the order shown in the information in
the following tables to optimize system performance.
mode.
indicated in the following tables.
– The following table lists the DIMM installation sequence for non-mirroring
mode when one or two microprocessors is installed in the server:
Table 9. DIMM population sequence (independent mode)
Number of installed
microprocessors
1
2
following information:
– In spare channel mode, one rank is a spare of the other ranks on the same
channel. The spare rank is held in reserve and is not available as system
memory. The spare rank must have identical or larger memory capacity than
all the other ranks (sparing source ranks) on the same channel. After sparing,
the sparing source rank will be lost.
Channel 1
DIMM connectors 3
and 4
DIMM connectors 9
and 10
DIMM connectors associated with the
microprocessor
1 through 6
7 through 12
DIMM connector population sequence
1, 3, 5, 2, 4, 6
1, 7, 3, 9, 5, 11, 2, 8, 4, 10, 6, 12
Channel 2
DIMM connectors 5
and 6
DIMM connectors 11
and 12