Mac G5 Tower Computer with Safari/Protools

128-bit data paths for up to 6.4-GBps memory throughput 1.6GHz model 256MB of PC2700 (333MHz) DDR SDRAM Four DIMM slots supporting up to 4GB of main memory 1.8GHz systems and 2Ghz systems 512MB of PC3200 (400MHz) DDR SDRAM Eight DIMM slots supporting up to 8GB of main memory Support for the following DIMMs (in pairs): 128MB DIMMs (64-bit-wide, 128- or 256-Mbit) 256MB DIMMs (64-bit-wide, 128- or 256-Mbit) 512MB DIMMs (64-bit-wide, 256-Mbit) 1GB DIMMs (64-bit-wide, 256-Mbit)