Installing Memory Modules - IBM IntelliStation M Pro 6225 Hardware Maintenance Manual And Troubleshooting Manual

Installing memory modules

The following notes describe the types of dual inline memory modules (DIMMs) that
your computer supports and other information that you must consider when
installing DIMMs:
v When you restart the computer after adding or removing a DIMM, the computer
v Your computer uses industry-standard PC2-3200 double-data-rate 2 (DDR2)
v The system board contains four DIMM connectors and supports two-way memory
v The DIMM options available for your computer are 256 MB, 512 MB, and 1 GB,
v Your computer comes with either two 256 MB or two 512 MB memory DIMMs
v DIMMs must be installed in matched pairs. The DIMMs in each pair must be the
v Install only 1.8 V, 240-pin, DDR2, PC2-3200, unbuffered synchronous dynamic
v The amount of usable memory will be reduced depending on the system
Complete the following steps to install a DIMM:
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IntelliStation M Pro Types 6225 and 6228: Hardware Maintenance Manual and Troubleshooting Guide
displays a message that the memory configuration has changed.
DIMMs.
interleaving.
which come in matched pairs. Your computer supports a minimum of 512 MB and
a maximum of 4 GB of system memory.
that are installed in DIMM 1 and DIMM 3 memory connectors. The second pair of
DIMMs must be installed in DIMM 2 and DIMM 4 memory connectors.
same size, speed, type, and technology as each other but do not have to match
the other pairs. You can mix compatible DIMMs from various manufacturers.
random-access memory (SDRAM) with error correcting code (ECC) DIMMs.
These DIMMs must be compatible with the latest PC2-3200 SDRAM unbuffered
DIMM specification. For a list of supported options for your computer, go to
http://www.ibm.com/pc/; then, select your country and navigate to the list of
options for your computer.
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.
1. Read Appendix B, "Safety information," on page 115 and the guidelines in
"Handling static-sensitive devices" on page 29.
2. Turn off the computer and all attached devices (see "Turning off the computer"
on page 6); then, disconnect all external cables and power cords.
3. Remove the side cover (see "Removing the side cover" on page 32).
4. For easier access to the memory modules, rotate the drive cage out of the
computer. Grasp the drive cage and rotate it until it locks into place.
5. Locate the DIMM connectors on the system board. Determine the connectors
into which you will install the DIMMs. Remember that DIMM 1 and DIMM 3
must be paired together (and must be the first installed pair) and DIMM 2 and
DIMM 4 must be paired together. The following table shows the installation
sequence.
Memory installation sequence
DIMMs
2 DIMMs
4 DIMMs
6. Gently open the retaining clips and, if necessary, remove any existing DIMM.
Slots
1, 3
1, 3, 2, 4