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  2. PCI Express - Wikipedia

    en.wikipedia.org/wiki/PCI_Express

    A PCI Express card fits into a slot of its physical size or larger (with x16 as the largest used), but may not fit into a smaller PCI Express slot; for example, a x16 card may not fit into a x4 or x8 slot. Some slots use open-ended sockets to permit physically longer cards and negotiate the best available electrical and logical connection.

  3. PCI-X - Wikipedia

    en.wikipedia.org/wiki/PCI-X

    PCI-X buses run only as fast as the slowest device, whereas PCIe devices are able to independently negotiate the bus speed. Also, PCI-X slots are longer than PCIe 1x through PCIe 16x, which makes it impossible to make short cards for PCI-X. PCI-X slots take quite a bit of space on motherboards, which can be a problem for ATX and smaller form ...

  4. Accelerated Graphics Port - Wikipedia

    en.wikipedia.org/wiki/Accelerated_Graphics_Port

    It is a technology used on motherboards made by ECS, intended to allow an existing AGP card to be used in a new motherboard instead of requiring a PCIe card to be obtained (since the introduction of PCIe graphics cards few motherboards provide AGP slots). An "AGP Express" slot is basically a PCI slot (with twice the electrical power) with an ...

  5. Peripheral Component Interconnect - Wikipedia

    en.wikipedia.org/wiki/Peripheral_Component...

    A typical 32-bit, 5 V-only PCI card, in this case, a SCSI adapter from Adaptec A motherboard with two 32-bit PCI slots and two sizes of PCI Express slots. Work on PCI began at the Intel Architecture Labs (IAL, also Architecture Development Lab) c. 1990. A team of primarily IAL engineers defined the architecture and developed a proof of concept ...

  6. PCI configuration space - Wikipedia

    en.wikipedia.org/wiki/PCI_configuration_space

    One of the major improvements the PCI Local Bus had over other I/O architectures was its configuration mechanism. In addition to the normal memory-mapped and I/O port spaces, each device function on the bus has a configuration space, which is 256 bytes long, addressable by knowing the eight-bit PCI bus, five-bit device, and three-bit function numbers for the device (commonly referred to as the ...

  7. Expansion card - Wikipedia

    en.wikipedia.org/wiki/Expansion_card

    In computing, an expansion card (also called an expansion board, adapter card, peripheral card or accessory card) is a printed circuit board that can be inserted into an electrical connector, or expansion slot (also referred to as a bus slot) on a computer's motherboard (see also backplane) to add functionality to a computer system. Sometimes ...

  8. ExpressCard - Wikipedia

    en.wikipedia.org/wiki/ExpressCard

    The ExpressCard has a maximum throughput of 2.5 Gbit/s through PCI Express and 480 Mbit/s through USB 2.0 dedicated for each slot, while all CardBus and PCI devices connected to a computer usually share a total 1.06 Gbit/s bandwidth. The ExpressCard standard specifies voltages of either 1.5 V or 3.3 V; CardBus slots can use 3.3 V or 5.0 V.

  9. Riser card - Wikipedia

    en.wikipedia.org/wiki/Riser_card

    1U 1-slot 32-Bit PCI Riser Card 2U 3-slot 32-Bit PCI Riser Card. A riser is usually connected to the mainboard's slot through an edge connector, though some, such as NLX and Next Unit of Computing Extreme, instead are plugged into an edge connector on the mainboard itself. In general, the main purpose is to change the orientation of the ...

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