Each processor module contains two UltraSPARC T4 chip multiprocessors (CMPs) and 32 DDR3 DIMM slots (16 DDR3 DIMM slots per CMP). CMPs are designated /SYS/PMx/CMP0 and /SYS/PMx/CMP1.
If only one PM is installed in the server, the single processor module must be installed in the lower PM slot (slot 0) and a filler panel must be installed in the upper PM slot (slot 1).
Figure 18 Processor Module Configuration Reference
1 Processor module 1 or filler panel
2 Processor module 0