Notes

1. Memory FRUs and Memory Options include two DIMMs.
2. The Memory Controller is integrated in the Opteron processor.
3. Mixing DDR333/PC2700 and DDR400/PC3200 DIMMs is not supported.
4. DDR400/PC3200 DIMMs are not supported with Opteron C0 or CG Stepping.

Installation Notes

1. The minimum Opteron requirement is one CPU0 DIMM (not supported by Sun).
2. Single DIMM Sun Fire V20z and V40z configurations are not supported.
   The minimum requirement is one memory option (two DIMMs) in each CPU (including V40z daughterboards).
3. Install memory in pairs, beginning with CPU 0 DIMM 0 and DIMM 1.
4. Two DIMMs of the same memory size, speed, and manufacturer form a pair.
5. CPU0 and CPU1 Memory pairs are Bank 0, DIMM 0/DIMM 1 and Bank 1, DIMM 2/DIMM 3 for each CPU.
6. Only CPU 0 DIMMs (Banks 0 and 1 adjacent to CPU 0) are accessible in a single CPU system (CPU 0).
7. Memory is mapped globally and is accessible by either CPU in a dual CPU system.

DDR400/PC3200 BIOS Restrictions

1. V20z BIOS <1.33.5.2 and V40z BIOS <2.32.8.2
   • The maximum addressable memory per CPU is 6GB.
   • Only two 2GB DIMMS per CPU are supported.
   • Install 2GB DIMMS in DIMM 0 and DIMM 1, then install 1GB or 512GB DIMMs.
2. These restrictions are resolved in V20z BIOS 1.33.5.2 (NSV 2.3.0.11a).
3. These restrictions are resolved in V40z BIOS 2.32.8.2 (NSV 2.3.0.6h).

Voltage Regulator Module Notes

1. Opteron C0 and CG Stepping CPU Options include Memory Voltage Regulator Module (VRM) 370-6646.
2. Opteron E0 Stepping CPU Options include Memory VRM 370-7747.
3. CPU0 Memory Voltage Regulator Module is required when CPU0 memory is installed.
4. CPU1 Memory Voltage Regulator Module is required when CPU1 memory is installed