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Peripheral Components Interconnect
(PCI)
Unlike the conventional PCI in your computer system,
which is 32 bits wide, PCI-X is 64 bits wide. As a result, the bandwidth
is automatically twice as high as what 32-bit PCI can deliver. The
PCI-X bandwidth 533MB/s.
PCI-X, not to be confused with PCI Express, abbreviated
as "PCIe" and used as a graphics
card slot.
PCI Express does not use a parallel bus structure,
but instead is a network of serial connections controlled by a hub
on the computer's motherboard. This enables PCI Express cards to
run significantly faster than previous PCI cards, reaching 5GB/s,
and on the PCIe 16x reaching 80GB/s transfer rates.
PCI Express was designed to be backwards compatible
with both PCI hardware and software.
PCI Express has native support for hot plugging and
hot swapping I/O peripherals.
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