PCI-X
The PCI-X specification addresses the need for increased bandwidth of PCI devices. PCI-X enables the design of systems and devices that operate at clock speeds up to 133 MHz, or 1 GB/s. Furthermore, PCI-X protocol enhancements enable devices to operate much more efficiently, thereby providing more useable bandwidth at any clock frequency. If you have additional questions about PCI-X, please see the FAQ in our Newsroom. All specifications are available for download by members. Non-members have the ability to obtain specifications by purchasing them. Just as importantly, PCI-X provides backward compatibility by allowing devices to operate at conventional PCI frequencies and modes when installed in conventional systems. Devices can be designed to meet PCI-X requirements and operate as conventional 33 MHz and 66 MHz PCI devices when installed in those systems. Similarly, if conventional PCI devices are installed in a bus capable of PCI-X operation, the clock remains at a frequency acceptable to the conventional device, and other devices on that bus are restricted to using conventional protocol. This high degree of backward compatibility enables the easy migration of systems and devices to bandwidths in excess of 1 GB/s. PCI-X revision 1.0b is PCI-X specification 1.0a with all errata (Z) fixed. Members only download:
Non-members:
Members and non-members download:
Compliance Checklist:
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