IBM System x3750 M4 Type 8722 Installation And Service Manual page 62

v The following table shows the DIMM population sequence for memory-sparing
v The server supports a maximum of 24 DIMMs (single-rank, dual-rank, or
v The following tables list the supported combinations of single-rank, dual-rank,
46
System x3750 M4 Types 8722 and 8733: Installation and Service Guide
mode.
Note: The server does not support a configuration of three microprocessors. The
server supports one, two, or four microprocessors only.
Table 10. DIMM population sequence for memory sparing mode
DIMMs
One microprocessor
1st set
2nd set
3rd set
4th set
Two microprocessors
1st set
2nd set
3rd set
4th set
Four microprocessors
1st set
2nd set
3rd set
4th set
quad-rank) on the base system board. If you mix single-rank, dual-rank, or
quad-rank DIMMs in the server, quad-rank DIMMs must be installed first.
Note: To determine the type of a DIMM, see the label on the DIMM. The
information on the label is in the format xxxxx nRxxx PC3-xxxxx-xx-xx-xxx. The
numeral in the sixth numerical position indicates whether the DIMM is
single-rank (n=1) or dual-rank (n=2).
and quad-rank standard registered DIMMs (RDIMMs) and load-reduced DIMMs
(LR-DIMMs) that you can install in the server.
Note: In the following table, the location of the DIMMs in the memory channels
are defined as follows:
Near DIMM: The DIMM in the memory channel that is the closest to the
microprocessor.
Middle DIMM: The middle DIMM in the memory channel.
Far DIMM: The DIMM in the memory channel that is the farthest from the
microprocessor.
DIMM connector
population
Number of sequence on the
microprocessors system board
1 1, 2, 3
1 10, 11, 12
1 4, 5, 6
1 7, 8, 9
2 1, 2, 3, 13, 14, 15
2 10, 11, 12, 22, 23, 24
2 4, 5, 6, 16, 17, 18
2 7, 8, 9, 19, 20, 21
4 1, 2, 3, 13, 14, 15
4 10, 11, 12, 22, 23, 24
4 4, 5, 6, 16, 17, 18
4 7, 8, 9, 19, 20, 21
DIMM connector
population
sequence on the
optional
microprocessor and
memory expansion
tray
25, 26, 27, 37, 38, 39
34, 35, 36, 46, 47, 48
28, 29, 30, 40, 41, 42
31, 32, 33, 43, 44, 45