ATI Technologies V7350 - 100-505143 FireGL 1GB 512-bit GDDR3 PCI Express Video Card User Manual page 61

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OpenGL®
Short for "Open Graphics Library," this is an industry standard for cross-
platform 3D graphics development. It consists of a large number of
functions that can be called upon in various programs, such as games,
CAD, and virtual-reality systems, to produce complex 3D objects from
simpler, more "primitive" building blocks. Implementations currently exist
under Windows®, Mac OS® X, and various forms of Unix, including
Linux®.
PCI
Acronym for "Peripheral Component Interconnect", which is the
specification for a type of computer bus used for attaching computer
peripherals to a computer's motherboard. PCI encompasses both integrated
motherboard components (such as built-in graphical processors) and
peripherals that fit into an expansion card slot, such as a separate graphics
card. PCI replaced the older ISA and VESA bus standards, and was itself
superseded by the AGP standard for the main graphics card bus.
PCI Express™ (PCIe)
The successor standard to the PCI and AGP bus standards, with a
significantly faster serial communications system, further opening up
bandwidth for more communications between such peripherals as graphics
cards and the computer's CPU. PCIe cards can come in several physical
configurations, the fastest currently being X16, which is typically used for
graphic cards, and X1, typically used for other peripherals, such as separate
multimedia cards.
Pipeline
In relation to computer graphic processors, refers to the number of separate
arithmetic units available for rendering the output on a display. In general,
more pipelines available on a graphical processor means there are more 3D
rendering capabilities available, increasing overall 3D performance.