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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,
v The system board contains four DIMM connectors and supports two-way memory
v The DIMM options available for the server are 512 MB, 1 GB, and 2 GB. The
v The server comes with one 512 MB DIMM or two 512 MB DIMMs installed.
v The amount of usable memory will be reduced depending on the system
v For two-way memory interleaving, DIMMs must be installed in matched pairs.
v Install only 1.8 V, 184-pin, double-data-rate 2 (DDR2), 533/667 MHz, PC2-4200,
v When you restart the server after adding or removing a DIMM, the server
double-data-rate 2 (DDR2) dual inline memory modules (DIMMs).
interleaving.
server supports a minimum of 512 MB and a maximum of 8 GB of system
memory.
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.
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 Chapter 3,
"Configuring the server," on page 49.
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.
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.
displays a message that the memory configuration has changed.
Chapter 2. Installing options
25
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