PCI Express is a general-purpose high-speed serial interface suitable for almost any application and offers a number of enhancements over classic PCI that make it the ideal IO backbone for several emerging technologies. This class provides an overview of PCI Express technology and highlights key improvements over classic PCI. It reviews and explains the many form factors available which support PCI Express, and discusses the layout and reference clock considerations for systems implementing PCI.
PCI Express (formerly known as 3GIO) is the new architecture for the third generation I/O interconnect, which will serve as a general purpose I/O interconnect for a wide variety of computing and communication platforms. The PCI-SIG has recently approved the official public release of this specification. PCI Express is a new I/O technology that is compatible with the current PCI software environment. Its layered architecture enables attachment to copper, optical, or emerging physical signaling media. It can be used for chip-to-chip and add-in card applications to provide connectivity for adapter cards, as a graphics I/O attach point for increased graphics bandwidth, as well as an attach point to other interconnects like USB 2.0 and Ethernet.
PCI Express is the latest interface for connecting a graphics card to a computer system, and it is the successor to AGP in terms of gaming graphics performance. A recent Tech Tip focused on PCIe and detailed the significant performance increases and flexible configurations available with PCI Express graphics cards.
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