IBM 7380E1U, Installation And User Manual

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Table 5. Maximum memory installation using ranked DIMMs (continued)
Number of DIMMs DIMM type DIMM size Total memory
12 Dual-rank UDIMMs 4 GB 48 GB
16 Single-rank RDIMMs 2 GB 32 GB
16 Dual-rank RDIMMs 2 GB 32 GB
16 Dual-rank RDIMMs 4 GB 64 GB
16 Dual-rank RDIMMs 8 GB 128 GB
12 Quad-rank RDIMMs 16 GB 192 GB
v
The RDIMM options that are available for the server are 1 GB, 2 GB, 4 GB, 8
GB, and 16 GB. The server supports a minimum of 1 GB and a maximum of 192
GB of system memory using RDIMMs.
For 32-bit operating systems only: Some memory is reserved for various
system resources and is unavailable to the operating system. The amount of
memory that is reserved for system resources depends on the operating system,
the configuration of the server, and the configured PCI devices.
v
The UDIMM options that are available for the server are 1 GB, 2 GB and 4 GB.
The server supports a minimum of 1 GB and a maximum of 48 GB of system
memory using UDIMMs.
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 107.
v
When you install one quad-rank RDIMM in a channel, install it in the DIMM
connector furthest away from the microprocessor.
v Do not install one quad-rank RDIMM in one channel and three RDIMMs in
another channel.
Independent channel mode
The server requires at least one installed DIMM. The server comes with a minimum
of two 1 GB DIMMs, installed in connectors 3 and 6. Connector 3 (in channel 0)
and connector 6 (in channel 1) are the farthest connectors from microprocessor 1 in
those channels. When you install additional DIMMs, install them in the order shown
in Table 6, to maintain server performance.
Note:
v Memory sparing is only available for Intel Xeon 5600 series microprocessor.
v
If you have configured the server to use memory mirroring or sparing, do not use
the order shown in this table; use the installation order that is shown in Table 8
on page 91.
v If you install a ServeRAID-M1015 SAS/SATA adapter, make sure at least 2 GB of
memory is installed in the server before you run DSA from a bootable CD.
Table 6. DIMM installation sequence for independent channel mode
Installed microprocessors DIMM connector population sequence
Microprocessor 1 3, 6, 8, 2, 5, 7, 1, 4
Microprocessor 1 and Microprocessor 2 3, 11, 6, 14, 8, 16, 2, 10, 5, 13, 7, 15, 1, 9,
4, 12
Chapter 2. Installing optional devices
89