IBM 9228 - IntelliStation Z - Pro User Manual page 62

v The following notes apply when the computer operates in the non-mirroring mode
The following table shows the DIMM configuration upgrade sequence
(non-mirroring mode).
The following illustration shows the DIMM connectors on the system board.
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IBM IntelliStation Z Pro Type 9228: User's Guide
Number of DIMMs
4
8
– Online-spare memory disables a failed pair of DIMMs from the system
configuration and activates an online-spare pair of DIMMs to replace the failed
pair of DIMMs. For an online-spare pair of DIMMs to be activated, you must
have installed an additional pair of DIMMs of the same speed, type, size (or
larger), and technology as the failed pair of DIMMs. When you use
online-spare memory, consider the following information:
- You cannot enable online-spare memory while the computer is operating in
mirroring mode.
- The minimum memory configuration is two double-rank DIMMs installed in
branch 0, DIMM connection 1 (in channel 0) and DIMM connection 3 (in
channel 1).
- The spare pair of DIMMs must be the same speed, type, size (or larger),
and technology as the failed pair of DIMMs.
- Branch 0 and branch 1 operate independently.
(normal mode).
– The computer comes with two 512 MB DIMMs installed in DIMM connectors 1
and 3. The second pair of DIMMs must be installed in DIMM connectors 5
and 7. The third pair of DIMMs must be installed in DIMM connectors 2 and 4.
The fourth pair of DIMMs must be installed in DIMM connectors 6 and 8.
– DIMMs must be installed in matched pairs. For example, the DIMMs in DIMM
connector 1 and 3 must be identical to each other, but do not have to be
identical to the DIMMs in DIMM connector 5 and 7. But the DIMMs in DIMM
connector 5 and 7 must be identical to each other. The DIMMs in each pair
must be the same size, speed, type, and technology as each other but do not
have to match the other pairs. You can mix compatible DIMMs from various
manufacturers. See the following table for the DIMM configuration upgrade
sequence non-mirroring mode (normal mode).
Number of DIMMs
First pair
Second pair
Third pair
Fourth pair
DIMM connections
1, 3, 5, 7
1, 3, 5, 7, 2, 4, 6, 8
DIMM connections
1, 3
5, 7
2, 4
6, 8