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.
v The server system board provides three memory channels for each
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 Channel 1 Channel 2
Microprocessor 1 DIMM connectors 1
and 2
DIMM connectors 3
and 4
DIMM connectors 5
and 6
Microprocessor 2 DIMM connectors 7
and 8
DIMM connectors 9
and 10
DIMM connectors 11
and 12
v The following table shows the DIMM connectors that are associated with each
microprocessor:
Table 8. DIMM connectors associated with each microprocessor
Microprocessor
DIMM connectors associated with the
microprocessor
Microprocessor 1 1 through 6
Microprocessor 2 7 through 12
v The maximum operating speed of the server is determined by the slowest
DIMM installed in the server.
v A minimum of one DIMM must be installed for each microprocessor. For
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.
v The server comes with a minimum of one DIMM installed in slot 1. When you
install additional DIMMs, install them in the order shown in the information in
the following tables to optimize system performance.
v The server supports independent mode, spare channel mode, and mirroring
mode.
v Independent mode: When you use the independent mode, install DIMMs as
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 DIMM connector population sequence
1 1,3,5,2,4,6
2 1, 7, 3, 9, 5, 11, 2, 8, 4, 10, 6, 12
v Spare channel mode: When you use the memory mirroring feature, consider the
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.
64 System x3300 M4 Type 7382: Installation and Service Guide
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