Specifications

Chapter 2. Architecture and technical overview 55
– Quad 2: J3A, J4A, J7A, J8A (mandatory minimum for each enclosure)
– Quad 3: J1B, J2B, J5B, J6B
– Quad 4: J3B, J4B, J7B, J8B
Table 2-7 shows the optimal placement of each DIMM-quad within a single enclosure system.
Each enclosure
must have at least DIMM-quads installed in slots J1A, J2A, J5A, J6A, and
J5A, J6A, J7A, and J8A, as shown with the highlighted color.
Table 2-7 Optimum DIMM-quad placement for a single enclosure system
When populating a multi-enclosure system with DIMM-quads, each enclosure must have at
least two DIMM-quads installed in slots J1A, J2A, J5A, J6A, J3A, J4A, J7A, and J8A.. After
the mandatory requirements and memory-plugging rules are followed, there is an optimal
approach to populating the systems.
Table 2-8 shows the optimal placement of each DIMM-quad within a dual-enclosure system.
Each enclosure must have at least two DIMM-quads installed.
Table 2-8 Optimum DIMM-quad placement for a dual 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 Q3 Q3 Q4 Q4 Q3 Q3 Q4 Q4
Quads Q1 and Q2 must be identical to each other.
Note: For maximum memory performance, the total memory capacity on each memory controller
should be equivalent.
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 Q5 Q5 Q8 Q8 Q5 Q5 Q8 Q8
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 Q6 Q6 Q7 Q7 Q6 Q6 Q7 Q7
Quads Q1 and Q2 must be identical to each other. Quads Q3 and Q4 must be identical to each other.
Note: For maximum memory performance, the total memory capacity on each memory controller
should be equivalent.