The following memory configuration rules apply to your system:
At least one memory bank (all four bank slots) must be filled for the system to boot.
DIMMs must be added four at a time within the same bank.
DIMM capacities can differ from one bank to the next--for example, four 64-Mbyte DIMMs installed in bank 0 and four 128-Mbyte DIMMs installed in bank 2 is permissible.
Refer to the following diagram for memory locations in your system.