Filter
Top Products
Installing a memory module
The following notes describe the types of dual inline memory modules (DIMMs) that
the server supports and other information that you must consider when installing
DIMMs:
v The server supports industry-standard, 533/667 MHz, PC2-4200,
double-data-rate 2 (DDR2) dual inline memory modules (DIMMs).
v The system board contains four DIMM connectors and supports two-way memory
interleaving.
v The DIMM options available for the server are 512 MB, 1 GB, and 2 GB. The
server supports a minimum of 512 MB and a maximum of 8 GB of system
memory.
v The server comes with one 512 MB DIMM or two 512 MB DIMMs installed.
Depending on the DIMM sizes that you select, the server also supports two or
four DIMMs. The 512 MB DIMM option kit contains one DIMM; however, the 1
GB DIMM and 2 GB option kits each contain two DIMMs.
v The amount of usable memory will be 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 Configuration/Setup Utility program and select
System Summary from the menu. For additional information, see the User’s
Guide on the IBM xSeries Documentation CD.
v For two-way memory interleaving, DIMMs must be installed in matched pairs.
If one DIMM is installed in the DIMM 1 connector, when you install an additional
DIMM, it must be installed in the DIMM 3 connector, and it must be the same
size, speed, type, and technology as the DIMM in the DIMM 1 connector. You
can mix compatible DIMMs from various manufacturers.
If you install a second pair of DIMMs in the DIMM 2 and DIMM 4 connectors,
they do not have to be the same size, speed, type, and technology as the
DIMMs in the DIMM 1 and DIMM 3 connectors. However, the size, speed, type,
and technology of the DIMMs that you install in the DIMM 2 and DIMM 4
connectors must match each other.
v Install only 1.8 V, 184-pin, double-data-rate 2 (DDR2), 533/667 MHz, PC2-4200,
unbuffered synchronous dynamic random-access memory (SDRAM) with error
correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest
DDR2 533/667 MHz SDRAM unbuffered DIMM specification. For a list of
supported options for the server, see http://www.ibm.com/servers/eserver/
serverproven/compat/us/; then, select your country and navigate to the list of
options for the server.
v When you restart the server after adding or removing a DIMM, the server
displays a message that the memory configuration has changed.
Chapter 2. Installing options 13