IBM A60 Type 6833, Руководство пользователя

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19
Installing memory
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 (dual channel RDRAM).
The IBM-installed RIMMs that come with your computer are non-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.
• RIMMs must be installed in pairs.
• Each channel must contain the same amount of memory.
• Each RIMM connector supports a maximum of 256 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.
• Both ECC and non-ECC RIMMs are supported. However, if both ECC and non-
ECC (non-parity) memory is used, the memory 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, see “Identifying parts on
the system board” on page 18.
2. At both ends of the RIMM connector on the system board, push outward on the
retaining clips until the module is loosened. Lift the RIMM or C-RIMM out of the
connector.