| Short
for Accelerated Graphics Port, AGP is an advanced port designed for Video
cards and 3D accelerators. Designed by
Intel, August of 1997
AGP
introduces a dedicated point-to-point channel so that the graphics controller can directly
access the system memory. Below is
an illustration of what the AGP slot may look like on your your
motherboard.
The AGP channel is 32-bits wide and runs at 66
MHz. This
translates into a total bandwidth of 266 MBps, as opposed to the PCI bandwidth of
up to 133 MBps. AGP also supports two optional faster modes, with throughputs of 533 MBps and 1.07
GBps. It also allows 3-D textures to be stored in main memory rather than video
memory.
Each computer with AGP support will
either have one AGP slot or onboard AGP video. If the user wishes to
have multiple video cards in the computer they would have one AGP
video card as well as one or more PCI video cards.
- Not all operating systems support
AGP because of limited or no driver support. It is also important to
Note that earlier versions of Windows did not incorporate AGP
support. See our Windows versions page
for information about Windows versions that support AGP.
- Additional help and information
about installing a video card can be found on
document CHADD.
- Additional information and help with
determining your version of AGP can be found on
document CH000308.
Also see: AGP Aperture, Bus, Motherboard
definitions, Video definitions
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