Table 13. DIMM population rules (continued)
DIMM 9, DIMM 21
DIMM 10, DIMM 22
All DIMMs must be the same DRAM width (such as 4R x 8)
DIMM 11, DIMM 23
DIMM 12, DIMM 24
All DIMMs must be the same DRAM width (such as 4R x 8)
Notes:
• Each DIMM pair must be the exact same size and speed. For example, DIMM 1 and DIMM 8 must be the
same size and speed. DIMM 2 and DIMM 7 must be the same size and speed. However, DIMM 1 and
DIMM 2 have to be the same technology, but they do not need to be the same size and speed.
• When populating the IBM MAX5, use the DIMMs with the greatest size first. For example, install all 8 GB
DIMMs before you install 4 GB DIMMs. Populate the DIMMs according to the DIMM population table for
your environment. See Table 14 “System memory configuration for performance” on page 110 through
Table 16 “System memory configuration for mirroring with power savings (uses a maximum of 16 DIMMs)”
on page 111 for the DIMM population order.
The installation order for DIMMs depends on whether you intend to optimize the DIMM installation for
performance or for power saving.
The following table lists the memory configurations and installation order to optimize the IBM MAX5 for
performance.
Table 14. System memory configuration for performance
Installed
memory
DIMM connector
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
2 DIMMs
X
X
4 DIMMs
X
X
X
X
6 DIMMs
X
X
X
X
X
X
8 DIMMs
X
X
X
X
X
X
X
X
10 DIMMs
X
X
X
X
X
X
X
X
X
X
12 DIMMs
X
X
X
X
X
X
X
X
X
X
X
X
14 DIMMs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
16 DIMMs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
18 DIMMs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
20 DIMMs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
22 DIMMs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
24 DIMMs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
The following table lists the memory configurations and installation order to optimize the IBM MAX5 for
power saving.
Table 15. System memory configuration for power saving (uses a maximum of 8 DIMMs)
Installed
memory
DIMM connector
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
2 DIMMs
X
X
4 DIMMs
X
X
X
X
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