IBM Power 780 User Manual

52 IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
Table 2-4 shows the optimal placement of each DIMM-quad within a dual-enclosure system.
Each enclosure must have at least two DIMM-quads installed.
Table 2-4 Optimum DIMM-quad placement for a dual enclosure system
Enclosure 1
CPU 1 CPU 3 CPU 4 CPU 2
Memory controller Memory controller Memory controller Memory controller
J1A J2A J3A J4A J5A J6A J7A J8A J1B J2B J3B J4B J5B J6B J7B J8B
Q1 Q1 Q2 Q2 Q1 Q1 Q2 Q2 Q5 Q5 Q8 Q8 Q5 Q5 Q8 Q8
Enclosure 2
CPU 1 CPU 3 CPU 4 CPU 2
Memory controller Memory controller Memory controller Memory controller
J1A J2A J3A J4A J5A J6A J7A J8A J1B J2B J3B J4B J5B J6B J7B J8B
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
must be equivalent.

IBM Power 780 Specifications

General

Brand	IBM
Model	Power 780
Category	Server
Language	English