Problems with your pci-e

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Posted by on 12 Sep 2009 11:49 am. Filed under hardware.
PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe (or PCI-E, as it is commonly called), is a computer expansion card standard designed to replace the older PCI, PCI-X, and AGP standards. Introduced by Intel in 2004, PCIe is the latest standard for expansion cards that is available on mainstream personal computers.[citation needed]

PCI Express is used in consumer, server, and industrial applications, as a motherboard-level interconnect (to link motherboard-mounted peripherals) and as an expansion card interface for add-in boards. A key difference between PCIe and earlier buses is a topology based on point-to-point serial links, rather than a shared parallel bus architecture.

The PCIe electrical interface is also used in a variety of other standards, most notably the ExpressCard laptop expansion card interface.

Conceptually, the PCIe bus can be thought of as a high-speed serial replacement of the older (parallel) PCI/PCI-X bus. At the software-level, PCIe preserves compatibility with PCI; a PCIe device can be configured and used in legacy applications and operating-systems which have no direct knowledge of PCIe’s newer features. In terms of bus-protocol, PCIe communication is encapsulated in packets. The work of packetizing and depacketizing data and status-message traffic is handled by the transaction-layer of the PCIe port (described later.) Radical differences in electrical-signalling and bus-protocol require the use of a different mechanical form factor and expansion connectors (and thus, new motherboards and new adapter-boards.)