IBM Power 780 Technical Overview And Introduction page 67

Table 2-5 shows the optimal placement of each DIMM-quad within a three-enclosure system.
must have
Each enclosure
Table 2-5 Optimum DIMM-quad placement for a three-enclosure system
CPU 1
Memory controller
J1A J2A J3A J4A
Q1 Q1 Q2 Q2
CPU 1
Memory controller
J1A J2A J3A J4A
Q3 Q3 Q4 Q4
CPU 1
Memory controller
J1A J2A J3A J4A
Q5 Q5 Q6 Q6
Quads Q1 and Q2 must be identical to each other. Quads Q3 and Q4 must be identical to each other.
Quads Q5 and Q6 must be identical to each other.
Note: For maximum memory performance, the total memory capacity on each memory controller
must be equivalent.
at least two DIMM-quads installed.
Enclosure 1
CPU 3
Memory Controller
J5A J6A J7A J8A J1B
Q1 Q1 Q2 Q2 Q7
Enclosure 2
CPU 3
Memory controller
J5A J6A J7A J8A J1B
Q3 Q3 Q4 Q4 Q8
Enclosure 3
CPU 3
Memory controller
J5A J6A J7A J8A J1B
Q5 Q5 Q6 Q6 Q9
Chapter 2. Architecture and technical overview
CPU 4
Memory controller Memory controller
J2B J3B J4B J5B
Q7 Q12 Q12 Q7
CPU 4
Memory controller Memory controller
J2B J3B J4B J5B
Q8 Q11 Q11 Q8
CPU 4
Memory controller Memory controller
J2B J3B J4B J5B
Q9 Q10 Q10 Q9
CPU 2
J6B J7B J8B
Q7 Q12 Q12
CPU 2
J6B J7B J8B
Q8 Q11 Q11
CPU 2
J6B J7B J8B
Q9 Q10 Q10
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