Specifications

56 IBM Power 770 and 780 Technical Overview and Introduction
Table 2-9 shows the optimal placement of each DIMM-quad within a three-enclosure system.
Each enclosure
must have at least two DIMM-quads installed.
Table 2-9 Optimum DIMM-quad placement for a three-enclosure system
Enclosure 0
POWER7 processor 0 POWER7 processor 1
Memory controller 1 Memory Controller 0 Memory controller 1 Memory controller 0
J1AJ2AJ3AJ4AJ5AJ6AJ7AJ8AJ1BJ2BJ3BJ4BJ5BJ6BJ7BJ8B
Q1 Q1 Q2 Q2 Q1 Q1 Q2 Q2 Q7 Q7 Q12 Q12 Q7 Q7 Q12 Q12
Enclosure 1
POWER7 Processor 0 POWER7 Processor 1
Memory Controller 1 Memory Controller 0 Memory Controller 1 Memory Controller 0
J1AJ2AJ3AJ4AJ5AJ6AJ7AJ8AJ1BJ2BJ3BJ4BJ5BJ6BJ7BJ8B
Q3 Q3 Q4 Q4 Q3 Q3 Q4 Q4 Q8 Q8 Q11 Q11 Q8 Q8 Q11 Q11
Enclosure 2
POWER7 Processor 0 POWER7 Processor 1
Memory Controller 1 Memory Controller 0 Memory Controller 1 Memory Controller 0
J1AJ2AJ3AJ4AJ5AJ6AJ7AJ8AJ1BJ2BJ3BJ4BJ5BJ6BJ7BJ8B
Q5 Q5 Q6 Q6 Q5 Q5 Q6 Q6 Q9 Q9 Q10 Q10 Q9 Q9 Q10 Q10
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
should be equivalent.