Installing A Memory Module - IBM 436854u - System x3200 M2 5U Mini Tower Server User Manual

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 you install
DIMMs:
v The server supports only industry-standard, 1.8 V, 240-pin double-data-rate 2
v The optional DIMMs that are available for the server are 512 MB, 1 GB, and 2
v Some servers come with one 512 MB DIMM, two 512 MB DIMMs, or two 1 GB
v The system board contains four DIMM connectors and supports two-way memory
v The maximum operating speed of the server is determined by the slowest DIMM
v The server can operate in single-channel mode or dual-channel mode.
v DIMM population is based on single-rank, double-rank, or combined single-rank
(DDR2), 667 or 800 MHz, PC2-5300 or PC2-6400, unbuffered, synchronous
dynamic random-access memory (SDRAM) dual inline memory modules (DIMMs)
with error correcting code (ECC). These DIMMs must be compatible with the
latest DDR2 667 or 800 MHz SDRAM unbuffered DIMM specification. For a list
of supported optional devices for the server, see http://www.ibm.com/servers/
eserver/serverproven/compat/us/.
GB. The server supports a minimum of 512 MB and a maximum of 8 GB of
system memory.
DIMMs installed.
Depending on the DIMM sizes that are installed in your server, the server can
support one, 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.
interleaving. 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 use 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.
in the server.
and double-rank DIMMs. DIMMs must be installed in order, starting with the
DIMM connector that is farthest from the memory controller hub. Double-rank
DIMMs must be installed in the DIMM connector that is farthest from the memory
controller hub when you install a combination of single-rank and double-rank
DIMMs. The following tables show examples of populating the server with
different combinations of single-rank and double-rank DIMMs and different
operating modes.
Table 2. Single-channel mode with single-rank and double-rank DIMMs
Channel 0
DIMM 1 DIMM 2
Single-rank
Double-rank
Single-rank Single-rank
Channel 1
DIMM 3 DIMM 4
Chapter 2. Installing optional devices
27