The similarities run deeper, however. The 1999 models were in two families. At the low end, the “Power Mac G4 (PCI Graphics)” 400 MHz model actually shared the logic board from the G3. It ran for just ...

In practice, these numbers meant that the Power Mac G5 ran circles around the G4, but Apple took the opportunity to improve more than just CPU performance. The original G5 used 400 MHz RAM, which ...