568 THE x86 MICROPROCESSORS
e AGP bus is a high-speed 32-bit bus specifi cally designed for a video card. Since
video and 3D graphics need high speed access to the system RAM, special video cards have
been designed, with extra on-board RAM, a specialized graphics processor and other features.
However, this card will be useless unless it has high speed access to the CPU and system RAM.
is need made Intel design a special port for it, placed close to the processor connected to the
North Bridge or Memory Controller Hub of the chipset and is manifested as a single AGP slot
in systems that support it.
AGP is a high speed bus with a clock frequency of 66.66 MHz. In the basic mode, called
AGP 1x, there is only one channel of transfer of 32 bits ...