Definition: local bus

Also called the "system bus," a local bus is the pathway between the CPU, memory and peripheral controller chips. The term was popular in the early 1990s with the introduction of the VESA local bus (see VL-bus). See bus and PC data buses.




Local Bus

  BUS SPEED COMPARISON

            Width  Speed  Total Data
            Width  Speed  Rate
  Bus type  (bits) (MHz)  (MB/Sec)

  ISA       16      8     16

  EISA      32      8     32

  VL-bus    32     25    100

  VL-bus    32     33    132

  PCI       32     33    132

  PCI       64     33    264

  PCIe      Serial       250 per lane