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The main memory bus is a 100-MHz, 64-bit bus connecting the main memory to the Uni-N IC.
Main memory is provided by up to four PC100 DIMMs. Supported DIMM sizes are 16, 32, 64, 128, 256, and 512 MB. Although the memory slots will accept four 512-MB DIMMs, the maximum memory size supported by Mac OS 9 is 1.5 GB.
For more information about memory DIMMs, see RAM Expansion .