PATHDocumentation > Hardware > Original Power Mac G4 Developer Note


Main Memory Bus

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. Four 512-MB DIMMs make a total of 2 GB, which is the maximum supported memory size.

For more information, see RAM Expansion.

Note:   At present, the Mac OS supports up to 1 GB of memory for applications. Future releases of the Mac OS will support the full 2 GB.


© 2000 Apple Computer, Inc. – (Last Updated 13 Jan 00)