v The LRDIMM option that is available for the server is 32 GB and 64 GB. The
server supports a minimum of 32 GB and a maximum of 1536 GB of system
memory using LRDIMMs.
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
“Configuring the server” on page 44.
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. However, to improve system performance, install a
minimum of four DIMMs for each microprocessor.
v DIMMs in the server must be the same type (RDIMM or LRDIMM) to ensure
that the server will operate correctly.
Notes:
1. You can install DIMMs for microprocessor 2 as soon as you install
microprocessor 2; you do not have to wait until all of the DIMM slots for
microprocessor 1 are filled.
2. DIMM slots 13-24 are reserved for microprocessor 2; thus, DIMM slots 13-24 are
enabled when microprocessor 2 is installed.
The following illustration shows the location of the DIMM connectors on the
system board.
DIMM 3
DIMM 9
DIMM 6
DIMM 12
DIMM 2
DIMM 8
DIMM 5
DIMM 11
DIMM 1
DIMM 7
DIMM 4
DIMM 10
Microprocessor 1
CPU1
DIMM 15
DIMM 21
DIMM 18
DIMM 24
DIMM 14
DIMM 20
DIMM 17
DIMM 23
DIMM 13
DIMM 19
DIMM 16
DIMM 22
Microprocessor 2
CPU2
Figure 94. DIMM connectors location
Chapter 5. Removing and replacing components 169
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