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What is an PCI Express slot?
The PCI Express slot is a much faster version of the Peripheral Component Interconnect (PCI). In fact, it's so much faster, it's being billed as a replacement for both regular PCI and AGP.

PCI Express can be found on newer motherboards. For a while, use of PCI Express won't show a lot of gain in performance due to lack of hardware and software that can take advantage of it. Currently, most PCI Express motherboards only contain 1 or 2 of these slots. This will change over time, though, as the technology catches up.

Though the hardware is still new, it's a good idea to make sure there is at least one PCI Express slot on any motherboard you plan to purchase.

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