IBM System x iDataPlex dx360 M4 7912 Service Manual page 330

v The following table shows an example of the maximum amount of memory that
v The UDIMM option that is available for the server are 2 GB and 4 GB. The
v The RDIMM options that are available for the server are 2 GB, 4 GB, and 8 GB.
v The LRDIMM option that is available for the server is 32 GB. The server supports
v A minimum of one DIMM must be installed for each microprocessor. For
v DIMMs in the server must be the same type (RDIMM or UDIMM) to ensure that
v When you install one quad-rank DIMM in a channel, install it in the DIMM
Notes:
1. You can install DIMMs for microprocessor 2 as soon as you install
2. DIMM slots 9-16 are reserved for microprocessor 2; thus, DIMM slots 9-16 are
The following illustration shows the location of the DIMM connectors on the system
board.
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System x iDataPlex dx360 M4 Types 7912 and 7913: Problem Determination and Service Guide
you can install using ranked DIMMs:
Table 10. Maximum memory installation using ranked DIMMs
Number of DIMMs DIMM type
16 Single-rank UDIMMs
16 Single-rank RDIMMs
16 Single-rank RDIMMs
16 Dual-rank UDIMMs
16 Dual-rank RDIMMs
16 Dual-rank RDIMMs
16 Quad-rank LRDIMMs 32 GB
server supports a minimum of 2 GB and a maximum of 64 GB of system memory
using UDIMMs.
The server supports a minimum of 2 GB and a maximum of 128 GB of system
memory using RDIMMs.
a minimum of 32 GB and a maximum of 512 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 342.
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.
the server will operate correctly.
connector furthest away from the microprocessor.
microprocessor 2; you do not have to wait until all of the DIMM slots for
microprocessor 1 are filled.
enabled when microprocessor 2 is installed.
DIMM size Total memory
2 GB 32 GB
2 GB 32 GB
4 GB 64 GB
4 GB 64 GB
4 GB 64 GB
8 GB 128 GB
512 GB