IBM System x3750 M4 Type 8722 Installation And Service Manual page 59
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- Product manual (45 pages) ,
- Installation and service manual (882 pages)
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Table 6. DIMM connectors on each memory channel for the microprocessors on the system
board and the optional microprocessor and memory expansion tray
DIMM
connectors
associated with
CPU 1 on the
Memory channel
system board
Channel 0
7, 8, 9
Channel 1
10, 11, 12
Channel 2
4, 5, 6
Channel 3
1, 2, 3
v The following table shows the DIMM connectors on the system board and the
microprocessor and memory expansion tray that are associated with each
microprocessor.
Table 7. DIMM connectors associated with each microprocessor
Microprocessor
Microprocessor 1
Microprocessor 2
Microprocessor 3
Microprocessor 4
v When you replace a DIMM, the server provides automatic DIMM enablement
capability without requiring you to use the Setup utility to enable the new
DIMM manually.
v The maximum operating speed of the server is determined by the slowest
DIMM in the server.
v DIMMs do not have to be installed in pairs, except in memory-mirroring mode.
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 (one for each microprocessor). If you install four
microprocessors in the server, you must install a minimum of four DIMMs (one
DIMM for each microprocessor). For more information about DIMM population
sequence, see Table 8 on page 44, Table 9 on page 45, and Table 10 on page 46.
Note:
– When one DIMM per microprocessor is installed, system performance can be
slow.
– To run VMware, one DIMM per microprocessor must be installed. If a DIMM
is not installed for each microprocessor, the server will not be able to boot
VMware.
– For best performance, install DIMMs evenly across all four memory channels
for each microprocessor.
v The server supports non-mirroring mode, memory mirroring mode, and memory
sparing mode. For more information and DIMM population for non-mirroring
DIMM
connectors
DIMM
associated with
connectors
CPU 3 on the
associated with
microprocessor
CPU 2 on the
and memory
system board
expansion tray
19, 20, 21
31, 32, 33
22, 23, 24
34, 35, 36
16, 17, 18
28, 29, 30
13, 14, 15
25, 26, 27
Location
System board
System board
Microprocessor and memory
expansion tray
Microprocessor and memory
expansion tray
Chapter 2. Installing optional devices
DIMM
connectors
associated with
CPU 4 on the
microprocessor
and memory
expansion tray
43, 44, 45
46, 47, 48
40, 41, 42
37, 38, 39
DIMM connectors
associated with the
microprocessor
1 through 12
13 through 24
25 through 36
37 through 48
43
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