IBM IntelliStation Z Pro Type 6866 User Manual page 80

If the memory card in your computer has eight RIMM connectors, 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 optimal performance. For the arrangement of the RIMM connector
pairs on your computer memory card, see the illustration on page 63.
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 inline 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.
Use the following table to help you to configure memory if you have a
memory card with eight RIMM connectors.
Memory placement for 8-RIMM Memory Card
1 2
2 RIMMs (1) (1) C-RIMM
4 RIMMs
C-RIMM RIMM C-RIMM
4 RIMMs* (1) (1)
6 RIMMs C-RIMM RIMM
RIMM RIMM
8 RIMMs
Note: Memory must be installed in matched pairs.
* Non-optimal performance configuration
(1) These connectors may either be left empty or used to store c-rimms.
Use the following table to help you to configure memory if you have a
memory card with four RIMM connectors.
Memory placement for 4-RIMM Memory Card
2 RIMMs
4 RIMMs
Note: Memory must be installed in matched pairs.
64
IntelliStation Z Pro User Guide
Pair 4
Pair 2
Pair 3
Pair 1
3 4 5 6
RIMM RIMM C-RIMM
RIMM RIMM C-RIMM
RIMM RIMM RIMM RIMM
RIMM RIMM RIMM RIMM
RIMM RIMM RIMM RIMM
Pair 1 Pair 2
3 4 1
RIMM RIMM C-RIMM C-RIMM
RIMM RIMM RIMM RIMM
7 8
(1) (1)
RIMM C-RIMM
(1) (1)
RIMM C-RIMM
RIMM RIMM
2