Memory Modules (Dimms) - IBM System x3755 M3 7164 Installation And User Manual

Memory modules (DIMMs)

The server supports up to 32 DIMMs. DIMMs in connectors 1 to 8 support
microprocessor 1, DIMMs in connectors 9 to 16 support microprocessor 2, DIMMs
in connectors 17 and 24 support microprocessor 3, and DIMMs in connectors 25 to
32 support microprocessor 4. The following illustration shows the DIMM connectors
on the system board.
DIMM 17
DIMM 18
DIMM 19
DIMM 20
DIMM 21
DIMM 22
DIMM 23
DIMM 24
The following notes describe the types of dual inline memory modules (DIMMs) that
the server supports and other information that you must consider when you install
DIMMs:
v To confirm that the server supports the DIMM that you are installing, see
v The server supports 2 GB, 4 GB, 8 GB, and 16 GB double data-rate (DDR) III,
v At least one pair of DIMMs must be installed for the server to operate.
v The following rules apply to ranked DDR3 DIMM speed as it relates to the
DIMM 1
DIMM 2
DIMM 3
DIMM 4
DIMM 5
DIMM 6
DIMM 7
DIMM 8
http://www.ibm.com/systems/info/x86servers/serverproven/compat/us/.
registered or unbuffered synchronous dynamic random-access memory (SDRAM)
with error correcting code (ECC) DIMMs. These DIMMs must be compatible with
the latest PC3-10600 or PC3-8500 SDRAM Registered DIMM specifications.
Note: The amount of usable memory is reduced depending on the system
configuration. A certain amount of memory must be reserved for system
resources. To view the total amount of installed memory and the amount of
configured memory, run the Setup utility. For additional information, see
Chapter 3, "Configuring the server," on page 75.
number of DIMMs in a channel:
Table 3. DIMM speed
DIMMs in
each channel DIMM type
1 Single-rank, dual-rank
Quad-rank
DIMM 16
DIMM 15
DIMM 14
DIMM 13
DIMM 12
DIMM 11
DIMM 10
DIMM 9
DIMM 32
DIMM 31
DIMM 30
DIMM 29
DIMM 28
DIMM 27
DIMM 26
DIMM 25
DIMM speed
1.5 V 1.35 V
1333 1333
1333 1066
Chapter 2. Installing optional devices
61