AGP
A Ccelerate G raphics P ort ( AGP, Accelerated Graphics Port, sometimes called A dvanced G raphics P ort , Puerto Advanced Graphics) is a port (since you can only connect one device, while on the bus can connect multiple) developed by Intel in 1996 as a solution to the bottlenecks that occurred in the graphics cards used the PCI bus. The design of the PCI specifications 2.1.
The AGP port is 32 bit and PCI but with notable differences as additional 8 channels for access to RAM . You can also directly access this through the north bridge can emulate video memory and RAM. bus speed is 66 MHz
Bus AGP has different modes of operation.
- AGP 1X: speed 66 MHz with a transfer rate of 266 MB / s and operating at a voltage of 3.3 V.
- AGP 2X: speed 133 MHz with a transfer rate of 532 MB / s and operating at a voltage of 3.3 V.
- AGP 4X: speed 266 MHz with a transfer rate of 1 Gb / s operating at a voltage of 3.3 or 1.5 V to fit the designs of graphics cards.
- AGP 8X: speed 533 MHz with a transfer rate of 2 Gb / s operating at a voltage of 0.7 V or 1.5 V.
These transfer rates are achieved by taking advantage of cycles bus clock by multiplying but physically modify ..
The AGP port is used exclusively to connect graphics cards, and because its architecture can be only one slot. This slot is about 8 cm and is next to the PCI slots .
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