Table 35. Maximum memory installation using ranked DIMMs
Number of DIMMs
DIMM type
DIMM size
Total memory
24
Single-rank RDIMMs
4 GB
96 GB
24
Dual-rank RDIMMs
8 GB
192 GB
24
Dual-rank RDIMMs
16 GB
384 GB
24
Quad-rank LRDIMMs
32 GB
768 GB
24
Quad-rank LRDIMMs
64 GB
1536 GB
• The RDIMM options that are available for the server are 4 GB, 8 GB, and 16 GB. The server supports a
minimum of 4 GB and a maximum of 384 GB of system memory using RDIMMs.
• 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 104.
• 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.
• DIMMs in the server must be the same type (RDIMM or LRDIMM) to ensure that the server will operate
correctly.
Note:
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.
The following illustration shows the location of the DIMM connectors on they system board.
Microprocessor 1
Microprocessor 2
DIMM 1
DIMM 2
DIMM 3
DIMM 4
DIMM 5
DIMM 6
DIMM 7
DIMM 8
DIMM 9
DIMM 10
DIMM 11
DIMM 12
DIMM 13
DIMM 14
DIMM 15
DIMM 16
DIMM 17
DIMM 18
DIMM 19
DIMM 20
DIMM 21
DIMM 22
DIMM 23
DIMM 24
Figure 171. The location of the DIMM connectors on the system board
Removing and replacing components
253
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