Dimm Installation Sequence - IBM System x3550 M3 Type 4254 Installation And User Manual

v The UDIMM options that are available for the server are 2 GB and 4 GB. The
v A minimum of one DIMM must be installed for each microprocessor. For
v DIMMs in the same channel must be the same type (RDIMM or UDIMM) to
v When you install one quad-rank RDIMM in a channel, install it in the DIMM
v Do not install one quad-rank RDIMM in one channel and three RDIMMs in
The following illustration shows the location of the DIMM connectors on the system
board.

DIMM installation sequence

Depending on the server model, the server may come with a minimum of one 2 GB
or 4 GB DIMM installed in slot 3. When you install additional DIMMs, install them in
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IBM System x3550 M3 Types 4254 and 7944: Installation and User's Guide
server supports a minimum of 2 GB and a maximum of 48 GB of system memory
using UDIMMs.
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
Chapter 3, "Configuring the server," on page 107.
example, you must install a minimum of two DIMMs if the server has two
microprocessors installed. However, to improve system performance, install a
minimum of three DIMMs for each microprocessor.
ensure that the server will operate correctly.
connector furthest away from the microprocessor.
another channel.