Pre-PowerPC G3 Mac Memory Tips

Here are a few performance and upgrading tips for pre-G3 series Mac owners.

Memory Interleaving

Many Power Macs (7300 to 9600) and Mac OS clones (Power Computing PowerTower Pro and PowerWave, Umax SuperMac S900 and J700) can use interleaved RAM. Even though the system data bus is 64 bits wide in these models, the memory controller can handle 128-bit data read/write operations by interleaving data between corresponding DIMMS. Interleaving memory provides higher effective transfer rates (called bandwidth) between the CPU and main memory. The benefits vary by application, and the highest gains are seen with programs or games that move a lot of data over the bus. For a performance comparison of interleaved RAM, see ...

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