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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 PC2-4200, double-data-rate 2 (DDR2)
v The server supports a maximum of two hard disk drives, four DIMMs, and one
v The system board contains four DIMM connectors and supports two-way memory
v You can install one, two, or four DIMMs in the server, but not three DIMMs. It is
v The DIMM options that are available for the server are 256 MB, 512 MB, 1 GB,
v The amount of usable memory will be reduced depending on the system
v The server comes with one 256 MB or 512 MB DIMM installed in the DIMM 1
v DIMMs must be installed in matched pairs. If you install a second pair of DIMMs
v Install only 1.8 V, 184-pin, double-data-rate 2 (DDR2), PC2-4200, unbuffered
v When you restart the server after adding or removing a DIMM, the server
dual inline memory modules (DIMMs).
5.25-inch device; or, one hard disk drive, four DIMMs, and two 5.25-inch devices;
or, two hard disk drives, two DIMMs, and two 5.25-inch devices.
interleaving.
not supported.
and 2 GB. The server supports a minimum of 256 MB and a maximum of 8 GB
of system memory.
configuration. A certain amount of memory must be reserved for system
resources. The BIOS will display the total amount of installed memory and the
amount of configured memory.
memory connector. If the server has one DIMM installed, 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. When one DIMM is
installed, the server runs as a single-channel server. When you add a DIMM in
the DIMM 3 connector, the server defaults to a dual-channel server.
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 you
install in the DIMM 2 and DIMM 4 connectors must match each other.
synchronous dynamic random-access memory (SDRAM) with error correcting
code (ECC) DIMMs. These DIMMs must be compatible with the latest PC2-4200
SDRAM unbuffered DIMM specification. For a list of supported options for your
server, go to http://www.ibm.com/us/compat/; then, select your country and
navigate to the list of options for your computer.
displays a message that the memory configuration has changed.
Chapter 2. Installing options
11
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