IBM x3690 X5 Service Manual page 315

- You can enable all DIMMs (1.35-volt and 1.5-volt) to operate at 1.5-volt in
the Setup utility.
v Some server models come with the Intel 7500 scalable memory buffer or the
Intel 7510 scalable memory buffer:
– Machine Types 7148 and 7149 comes with the Intel 7500 scalable memory
buffer
– Machine Types 7147 and 7192 comes with the Intel 7510 scalable memory
buffer
v Double-device data correction support is only available when 16 GB x4 DRAM
technology DIMMs are installed in the server.
v The following table provides information about the maximum amount of
memory that the server can support when you fully populate the server, the
optional memory tray, and the optional IBM MAX5 for System x memory
expansion module using the supported DIMMs.
Table 17. The maximum amount of memory that server can support
Number of DIMM connectors
16 DIMMs on system board
16 DIMMs on the optional memory tray
32 DIMMs on the optional IBM MAX5 for
System x memory expansion module
Note: The server can support a maximum 2 TBs of system memory when both the optional
memory tray and the optional IBM MAX5 for System x memory expansion module is
installed and fully populated with 32 GB (when supported and depending on the model)
DIMMs.
v The server supports a maximum of 16 DIMMs (single-rank, dual-rank, or
quad-rank) on the base system board. If you mix single-rank, dual-rank, or
quad-rank DIMMs in the server, quad-rank DIMMs must be installed first.
Note: To determine the type of a DIMM, see the label on the DIMM. The
information on the label is in the format xxxxx nRxxx PC3-xxxxx-xx-xx-xxx. The
numeral in the sixth numerical position indicates whether the DIMM is
single-rank (n=1) or dual-rank (n=2).
v The DIMM options that are available for the server are 2 GB, 4 GB, 8 GB, 16 GB,
and 32 GB (when available and depending on the model)
v The server system board supports a minimum of 2 GB and a maximum of 512
GB (depending on the model) of system memory. However, the server can
support an additional 512 GB of memory when the 16-DIMM optional memory
tray is installed in the server, and an additional 1 TB of memory when the
32-DIMM optional IBM MAX5 for System x memory expansion module is
attached to the server, for a total of 2 TBs of system memory, depending on the
model.
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 398.
Maximum memory
up to 512 GB
up to 512 GB
up to 1 TB GB
Total = 2 TBs of memory
Chapter 5. Removing and replacing components
297