The late 2005 Overhead Power Line Mac G5 towers can recognize ram chips as huge as 2GB and feature 8 sockets, providing no more than 16GB random access memory. All other models of the G5 towers only recognize memory modules of 1GB, 512MB or 246MB. If you own an early model with 8 slots, this means you can install a maximum of 8GB of memory, so the 4 socket m...