I don't know for the entire product line, but can give one datapoint: A Beige G3 MiniTower is an OldWorld PCI bus PowerMac. 266MHz CPU 133MHz L2 Cache (Backside) 066MHz System Bus (PCI) at 64bits wide -- Copyright 2002 Angela Kahealani. All Rights Reserved Without Prejudice, UCC 1-207. All information and transactions are private between the parties and are non negotiable. http://www.kahealani.com/