PCI-X slot
Power cable

8. Connect the riser-card power cable to the PCI-X riser-card assembly.

If you have to remove the PCI-X riser-card assembly from the server, disconnect

the riser-card power cable from the assembly first; then, grasp the front and rear
edges of the assembly and lift the assembly out of the server.
If you have other devices to install or remove, do so now. Otherwise, go to
“Completing the installation” on page 38.
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 512 MB, 1 GB, and 2 GB DIMMs, for a maximum of 8 GB of

system memory. See http://www.ibm.com/servers/eserver/serverproven/compat/

us/ for a list of memory modules that you can use with the server.

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. Use the system summary in the Configuration/Setup Utility program to
view the total amount of installed memory and the amount of configured memory
(see “Using the Configuration/Setup Utility program” on page 44).
v The server comes with one 512 MB or 1 GB DIMM installed in DIMM connector

1 and an identical DIMM (the same size, speed, type, and technology) installed

in DIMM connector 3.
v If you install a pair of DIMMs in DIMM connectors 2 and 4, the size, speed, type,
and technology of the DIMMs that you install in DIMM connectors 2 and 4 must
match each other. However, they do not have to be the same size, speed, type,
and technology as the DIMMs that are installed in DIMM connectors 1 and 3.

v You can use compatible DIMMs from various manufacturers in the same pair.

v Install only double-data-rate II (DDR II), PC2-5300, unbuffered synchronous
dynamic random-access memory (SDRAM) with error correcting code (ECC)
DIMMs. These DIMMs must be compatible with the latest PC2-5300 SDRAM
unbuffered DIMM specification.
v If you install a pair of 2 GB DIMMs and a pair of other-size DIMMs, the 2 GB
DIMMs must be installed as the first pair (in DIMM connectors 1 and 3).
36 IBM System x3250 M2 Types 4190 and 4194: User’s Guide