The increasing I/O bandwidth requirement and decreasing real-estate requirements of end products necessitate the adoption of faster I/O interconnect technology. The latest PCI Express technology is the third generation of the Peripheral Component Interconnect (PCI) standard aimed at driving faster and more scalable transmission rates than PCI and PCI-X.

This paper provides an overview of the PCI Express technology, including configuration and applications. Comparisons in terms of protocols between PCIe and PCI/PCI-X are also described.

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