Notes (U80, 420R, Netra t1400/1405)

1. DIMMs are required on both the Riser Board and the System Board.
2. Every populated bank must contain four same-size DIMMs. Four same-size DIMMs are a quad.
3. To activate 2-way interleaving, quads must be installed in banks 0 and 1, which are non-adjacent banks.
   (A third quad may be installed in either remaining bank, but that will disable interleaving.)
4. To activate 4-way interleaving, all four banks must be populated with quads.
5. Each bank addresses 1GB of memory.
6. 64MB DIMM 501-2480 and 128MB DIMM 501-3136 are not supported.
7. 16MB and 32MB DIMMs are not sold for the Ultra 80 System Board.

Notes (E450, Ultra 450)

1. Four DIMMs of the same size form a bank.
2. The installation sequence is AAAA, BBBB, CCCC, and DDDD.
3. Use the setenv memory-interleave OBP command to set interleaving.
4. The smallest DIMM size is used and the remaining memory is lost if interleaving is enabled and the bank sizes are different.