Memory(Rimm) - IBM NetVista Hardware Maintenance Manual

Memory(RIMM)

Your computer has four connectors for Rambus in-
line memory modules (RIMMs) that provide up to a
maximum of 1.5 GB of system memory.
The IBM-installed RIMMs that come with your
computer are ECC (error checking and correction)
Rambus dynamic random access memory (RDRAM)
modules.
When installing or replacing RIMMs, take the
following information into consideration:
•
Rambus memory is divided into two
channels (channel A and B). RIMM connectors
1 and 3 are channel A, and RIMM connectors 2
and 4 are channel B.
•
Each channel must contain the same
amount of memory.
•
Each RIMM connector supports a
maximum of 512 MB of memory.
•
Any connector that does not have a RIMM
installed must have a continuity RIMM (C-
RIMM), a module that looks like a RIMM but has
no memory on it. A C-RIMM is used to continue
the connection on a RIMM connector that does
not have memory installed in it.
•
Install only ECC RIMMs to enable ECC. If
you use ECC and non-ECC memory together, it
will function as non-ECC memory.
•
RIMM connectors do not support dual in-
line memory modules (DIMMs).
•
Use only PC600 or PC800 RIMMs.
NOTE: If you use PC600 and PC800 RIMMs together,
all memory will function at the speed of the
slowest RIMM.
Removing a RIMM or C-RIMM
To remove a RIMM or C-RIMM:
1.
To locate the RIMM connectors inside your computer.
General Information 101