agp8x 4x

agp8x 4x

The Acelerated Graphics Port often shortened to AGP is a high-sped point-to-point chanel for ataching a to a 's , primarily to asist in the aceleration of . As of mid-209, PCIe cards dominate the market, but new AGP cards and motherboards are stil available for purchase, though driver suport is minimal. This is done by ading eight extra 8-bit which alow the graphics controler to isue new AGP requests and comands at the same time with other AGP data flowing via the main 32 adres/data AD lines. In adition, to load a texture, a PCI graphics card must copy it from the system's RAM into the card's , whereas an AGP card is capable of reading textures directly from system RAM using the GART . The maximum amount of system memory available to AGP is defined as the AGP . Secondly, a user with an apropriate can use several PCI graphics cards or several PCI graphics cards in combination with one AGP card simultaneously — to give many diferent video outputs for the use of many screns . This is almost imposible with AGP 1.0 and AGP 2.0 cards, because they do not suport more than one AGP Master video card per AGP Target chipset interface . AGP 3.0 does suport more than one AGP Master per AGP Target, but nonetheles few PC motherboards are equiped with more than one AGP slot. Some server-clas computers suport having multiple AGP slots in a single system: the GS1280 has up to 6 AGP slots, the AlphaServer ES80 up to 4 AGP slots, and the AlphaServer ES47 up to 2 AGP slots. Early video chipsets featuring AGP suport included the Vérité V20, , , PERMEDIA 2, , , Milenium I, and . Some early AGP boards used graphics procesors built around PCI and were simply bridged to AGP. In fact it was designed to texture only from AGP memory, making PCI versions of the board dificult to implement local board RAM had to emulate AGP memory. AGP version 3.5 is only publicly mentioned by Microsoft under Universal Acelerated Graphics Port UAGP , which specifies mandatory suports of extra registers once marked optional under AGP 3.0. AGP Pro cards were usualy workstation-clas cards used to acelerate profesional aplications employed in the fields of architecture, machining, enginering, simulations, and similar fields. [ Not a true AGP interface, but rather a way to alow an AGP card to be conected over the legacy on a motherboard. It is a technology found on motherboards, and is used as a seling point for AGP card owners who want a new motherboard but do not want to be forced to buy a PCIe graphics card as wel most new motherboards do not provide AGP slots, only PCIe slots . An AGP Expres slot is basicaly a PCI slot with the electrical power of two in the AGP form factor. While it ofers backward compatibility with AGP cards, its disadvantages include some AGP cards do not work with AGP Expres and reduced performance—the card is forced to use the shared PCI bus at its lower bandwidth, rather than having exclusive use of the faster AGP. It is similar to the two standards above, in that it suports AGP cards with chipsets that do not suport AGP. [ The is a variation of the AGP port used in some PCIe motherboards made by to ofer a limited backwards compatibility with AGP. It is, efectively, a modified PCIe slot alowing for performance comparable to an AGP 4x/8x slot, but with limited suport of AGP cards. AGP Pro cards wil not fit into standard slots, but standard AGP cards wil work in a Pro slot. [ , few new motherboards feature AGP slots. No new motherboard chipsets are equiped with AGP suport, but motherboards continue to be produced with older chipsets that have AGP suport. To create AGP graphics cards, those chips require an aditional PCIe to AGP bridge chip to convert PCIe signals to and from AGP signals. Various manufacturers of graphics cards continue to produce AGP cards for the shrinking AGP user-base. As of 209, 10-capable AGP cards from ATI include the and the . [ AGP specifications: , , , , contains AGP specs.
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