The Power Mac G4 logic board provides four PC-100 DIMM slots.
Compatible DRAM DIMMs must meet all the following specifications:
- PC-100 Synchronous DRAM (SDRAM)
- 3.3 volt
- 64-bit wide, 168-pin module
- Maximum of 16 memory devices on the DIMM
- Unbuffered; do not use registered or buffered Synchronous DRAM (SDRAM)
- Maximum height of 2.0 inches.
Note: Although 2 GB can be installed, a maximum of 1.5 GB can be addressed through the Finder in the Mac OS.
The computer comes from Apple with one DIMM slot populated with a 128 MB DIMM. Additional DIMMs can be installed in any order, in any size. There is no performance benefit to matching DIMM sizes or installing them in pairs.