IBM BladeCenter HX5 Installation And User Manual page 44

Notes:
v Each DIMM pair must be the exact same size and speed. For example, DIMM 1
v When populating the IBM MAX5, use the DIMMs with the greatest size first. For
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 3. System memory configuration for performance
Installed
memory
1 2 3
2 DIMMs X
4 DIMMs X
6 DIMMs X
8 DIMMs X X
10 DIMMs X X
12 DIMMs X X
14 DIMMs X X X
16 DIMMs X X X
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IBM BladeCenter HX5 Type 7873, 7872, 1910, and 1909: Installation and User's Guide
Table 2. DIMM population rules
All DIMMs in this group must be the same technology (DRAM size, such as 2 Gbit)
DIMM 1, DIMM DIMM 2, DIMM 7
8
DIMM 3, DIMM DIMM 4, DIMM 5
6
All DIMMs in this group must be the same technology (DRAM size, such as 2 Gbit)
DIMM 13, DIMM 14, DIMM18
DIMM 17
DIMM 15, DIMM 16, DIMM 20
DIMM 19
All DIMMs in this group must be the same technology (DRAM size, such as 2 Gbit)
DIMM 9, DIMM DIMM 10, DIMM 22
21
DIMM 11, DIMM 12, DIMM 24
DIMM 23
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.
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 3 through Table 5 on page 35 for the DIMM population order.
4 5 6 7 8 9
X
X
X
X X
X X
X X
X X X
X X X
DIMM Grouping A
All DIMMs must be the same DRAM width (such
as 4R x 8)
All DIMMs must be the same DRAM width (such
as 4R x 8)
DIMM Grouping B
All DIMMs must be the same DRAM width (such
as 4R x 8)
All DIMMs must be the same DRAM width (such
as 4R x 8)
DIMM Grouping C
All DIMMs must be the same DRAM width (such
as 4R x 8)
All DIMMs must be the same DRAM width (such
as 4R x 8)
DIMM connector
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
X
X X
X X
X X X
X X X X
X X X X
X X X X X
X
X
X
X X
X X X
X X X
X X X X
X
X
X
X
X
X