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What is the difference between PCI and PCI Express?


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Wiki User
2010-12-20 04:16:50
2010-12-20 04:16:50

PXI is PCI eXtensions for Instrumentation, Peripheral component interface bus

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The difference between a PCI card and a PCI Express card is in the speed at which they function. The PCI Express card is a much faster card than the PCI card. Both are very popular choices among users.

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PCI Express 2.0 is used by new generation of video cards (some difference in power and I guess system instructions). PCI Express video card can work with PCI Express 2.0 port. But PCI Express 2.0 card cannot work in PCI Express port.

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The main difference is the length of the slot. Generally speaking, PCI slot is more longer than PCI express slot.. The PCI express is the latest version of PCI. it is more powerful and can receive more frequency than PCI

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PCI Express is much faster than PCI.

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YES, the pci express 2x16 backward compatible with the pci express x16 slot.


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