PCI-X

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This is a variant of the normal PCI slot, but it is only seen on server/workstation mainboards. Although the slots differ in length. PCI cards (except early cards) will work in a PCI-X slot, although only at the PCI bus' specified speed (33/66Mhz).


Compared to PCI:

  • PCI-X changes the protocol a little and increases the data rate to 133MHz
  • PCI-X 2.0 uses a 266MHz rate and also a 533MHz rate, expands the configuration space to 4KB, adds a 16-bit bus variant and allows for 1.5V signalling.
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