A 64-bit card can fall back to 32-bit mode if it is inserted into a shorter, 32-bit slot, whether PCI or PCI-X. Every device on a bus adds a load which a signaling device has to overcome.

A connector has at least 36 pins, but can have 164 pins in an x16 slot configuration ... as with ISA, PCI and similar interfaces. Those have a length that’s defined by the width of the bus.

motherboards had at least one PCIe slot for graphics. PCIe superseded PCI and PCI-X. Unlike its PCI predecessor, which used a shared bus, PCI Express is a switched architecture of up to 32 ...

For more than a decade the PCI bus has been the backbone of personal computers. Other systems, such as telephony and networking, adopted the technology for its cost and performance advantages. But now ...

1. Overview The PCI Express protocol has become increasingly popular as the PCI bus successor for IO device attachment. While PCI Express utilizes advanced fast serial interconnect technologies for ...