Apple Power Mac G5 - Manual (Page 12)

A Giant Leap over the Power Mac G4
The Power Mac G5 represents a huge leap over its predecessor. With the 64-bit G5
processor, high-bandwidth architecture, and leading-edge expansion options, Power
Mac G5 users will realize performance gains in media streaming, video editing, real-
time effects, audio synthesis, image processing, 3D rendering, numerical analysis, and
physical modeling.
Compare the top-of-the-line dual 1.42GHz Power Mac G4 with the dual 2GHz Power
Mac G5:
Power Mac G4 Power Mac G5
Processor 32-bit PowerPC G4 64-bit PowerPC G5
Clock speed 1.42GHz 2GHz
Frontside bus 167MHz 1GHz per processor
Frontside bus bandwidth 1.3 GBps 8 GBps
Dual processor interface One shared bus Two independent buses
Dual processor bandwidth 1.3 GBps 16 GBps
Maximum memory 2GB 8GB
Memory 333MHz, 64-bit DDR SDRAM 400MHz, 128-bit DDR SDRAM
Memory bandwidth 2.7 GBps 6.4 GBps
Graphics AGP 4X AGP 8X Pro
PCI expansion 33MHz, 64-bit PCI 133MHz, 64-bit PCI-X
PCI throughput 266 MBps 2 GBps
ATA storage 100 MBps shared 150 MBps per channel
12 Technology and
Performance Overview
Power Mac G5