2.2.01b. Machine architecture (by distance)

  • Distance from chip determines minimum latency
  • Speed of light is a constant
  • Impact of bus frequencies
    • IDE (66,100,133 Hz)
    • PCI, PCI-X (66,100,133 Hz)
    • PCI Express (1Ghz to 12Ghz)
  • Impact of bus bandwidths
    • PCI (32/64 bit/cycle, 133MB/s)
    • PCI Express (x16 8.0GB/s)

Computer components by distance from processor

Here's a link from Intel showing a machine architecture with signal bandwidths: Intel diagram