Accessing The System Board; Installing Memory - IBM IntelliStation M Pro Type 6868 User Manual

Accessing the system board

To access the system board, it helps to place the computer on its side on a
table. You might need to remove some parts that impede your access to
components on the system board. When disconnecting cables, it is
important to note where they attach, so you can correctly reattach them
later.
For information on removing the computer cover, see "Disconnecting cables
and removing the cover" on page 64.

Installing memory

You can add memory to the IntelliStation M Pro to increase system
performance using Rambus inline memory modules (RIMMs). There are four
connectors (RIMM 1, RIMM 2, RIMM 3, and RIMM 4) for installing Rambus
memory. The maximum amount of system memory the IntelliStation M Pro
supports is 2 GB.
The IBM-installed RIMMs that come with your computer are Rambus
dynamic random access memory (RDRAM) modules. They are either
non-error checking and correction (non-ECC) modules or error checking
and correction (ECC) modules.
When installing or replacing RIMMs, take the following information into
consideration:
Rambus memory is divided up into two channels (channels A and B).
RIMM connectors 1 and 2 are on channel A and RIMM connectors 3
and 4 are on channel B.
Each channel must contain the same amount of memory.
Each RIMM connector supports a maximum of 512 MB of memory.
Install only ECC RIMMs to enable ECC. If you use ECC and non-ECC
memory together, all memory will function as non-ECC.
RIMM connectors do not support dual inline memory modules
(DIMMs).
Any connector that does not have a memory RIMM installed must have
a continuity RIMM (C-RIMM) installed. A C-RIMM is used to continue
the connection for a RIMM connector that does not have memory
installed in it.
Use PC600 (300 MHz) or PC800 (400 MHz) RIMMs. Both can be used
in the same computer but when there is a mix, all memory will run at
the rate of the slowest RIMM.
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IntelliStation User Guide