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Hard
Disk
Fan
Power
RIMM
Pair 4
Four RIMM memory card
Hard
Disk
Power
Fan
Type 6866 memory
Rambus inline memory modules (RIMMs)
The IBM-installed RIMMs are ECC (error checking and correction) RDRAM (Rambus
dynamic random access memory) modules.
When installing or replacing RIMMs, take the following information into
consideration:
•
RIMM connectors do not support dual inline memory modules (DIMMs)
•
Use only PC600 or PC800 RIMMs.
•
There are four or eight RIMM memory cards. RIMMs must be installed in pairs.
The RIMMs installed in a RIMM connector pair must be of the same speed, and
size.
•
For four RIMM cards, any connector that does not have a RIMM installed must
have a continuity RIMM (C-RIMM).
•
For eight RIMM cards, pairs 1 and 3 must have RIMMs or C-RIMMs installed in
them. If RIMMs are installed in pair 2, RIMMs or C-RIMMs must be installed in
pair 4. For the arrangement of the RIMM connector pairs on the computer
memory card, see "Locating components on the memory card" on page 18
•
Install only ECC RIMMS to enable ECC. If ECC and non-ECC memory are used
together, the memory will function as non-ECC memory.
8-RIMM Memory Card
RIMM Socket 1
RIMM Socket 2
RIMM Socket 3
RIMM Socket 4
RIMM
Pair 3
RIMM Socket 5
RIMM Socket 6
RIMM Socket 7
RIMM Socket 8
4-RIMM Memory Card
RIMM Socket 1
RIMM Socket 2
RIMM Socket 3
RIMM Socket 4
RIMM
Pair 1
RIMM
Pair 2
RIMM
Pair 2
RIMM
Pair 1
FRU replacements
19
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