IBM NeXtScale System Planning And Implementation Manual page 92

The locations of the DIMM sockets relative to the processors are shown in
Figure 4-7.
DIMM 2 DIMM 1
DIMM 3
DIMM 4
Figure 4-7 Memory DIMM slots
Memory DIMM installation: Independent channel mode
Independent channel mode provides a maximum memory of 64 GB of usable
memory with one installed processor, and 128 GB of usable memory with two
installed microprocessor (using 16 GB DIMMs).
Table 4-6 shows DIMM installation if you have one processor that is installed.
Table 4-6 Memory population with one processor installed
Number of DIMMs
1
2
3
4
Table 4-7 on page 75 shows DIMM installation if you have two processors that
are installed. A minimum of two memory DIMMs (one for each processor) are
required when two processors are installed.
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IBM NeXtScale System Planning and Implementation Guide
CPU 1 DIMM 6 DIMM 5
DIMM 7 DIMM 8 CPU 2
DIMM 1 DIMM 2
x
x
x
x
Processor 1
DIMM 3
x
x x
x x
DIMM 4
x