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AGP (Accelerated Graphics Port)

AGP (Accelerated Graphics Port) is a bus interface for graphics adapters developed from the PCI bus. Intel provided the majority of the development for AGP, and the specification was originally designed around the Pentium II processor. AGP speeds up 3-D graphics, 3-D acceleration, and full-motion playback. Previous video adapters were limited by the bottleneck caused by going through an adapter and a bus shared with other devices. With AGP, the video subsystem is isolated from the rest of the computer. Figure 3.30 shows an illustration of an AGP slot compared with PCI expansion slots. All of these expansion slots have been replaced by PCIe (covered next).

Figure 3.30

Figure 3.30 AGP and PCI expansion slots

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