PCI Express Battles PCI-X

PCI-X Modes Compared

The backwards compatibility issue is a big point in favor of PCI-X. Administrators need to be absolutely sure the hardware they deploy will work properly, which is why there is a rather slow adoption of new technology in the server/workstation area. Why should folks say goodbye to a proven technology that remains backwards compatible, offers sufficient performance and benefits from a large hardware base? This likely won't change very much in the near future, since the PCI-SIG is working on a PCI-X 1066 standard. This would double the bandwidth once again, and add features such as on-the-fly data compression, auto fail-over and redundant path mechanisms. It may also incorporate support for isochronous transfers, but remove support for conventional PCI.

Image source: PCI-SIG PCI-X 2.0 Presentation. The only way to provide multiple high bandwidth PCI-X slots is by deploying multiple PCI-X bridge components onto a motherboard.

Patrick Schmid
Editor-in-Chief (2005-2006)

Patrick Schmid was the editor-in-chief for Tom's Hardware from 2005 to 2006. He wrote numerous articles on a wide range of hardware topics, including storage, CPUs, and system builds.

  • herb2021
    Buyers need to be very aware of limited compatiblility with many of today's MB. Will not work in many machines. Highpoint Tech support is one of the worst I have worked with. No indication of any technical ability in those I have worked with.
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