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AGP Bandwidth

Associate
Joined
14 Nov 2006
Posts
306
Hi! Does the ATi Radeon 9800 pro fully utilize the whole of the AGP bandwidth and what happens if I upgrade to the 1950 PRO AGP? Will there be some kind of wait states or will it be the maximum dataflow that AGP can handle?


-Yarkanat
 
AGP bandwidth is rarely overstretched, most of the data transfer to the graphics card is made when moving into a new area/zone at the loading screens.

Once the textures are in the graphics card's onboard memory, the amount of data exchanged between the card and the CPU can pretty much be handled by the original AGP X1 spec. A gentle trickle of data.

So a 1950 Pro on AGP will still be a fast/powerfull card. At best you wont tell the difference between a similar specced PCI Express card, at worse there will be a small increase in loading times as it uploads textures from system ram to the graphics card, and a small overhead caused by the added latency of the AGP/PCI Express bridge chip on the graphics card itself.

AGPx8 was a long way from being obsolete, and its replacement with PCI Express largely a way to sell new motherboards etc.

Not that PCI express has no advantages, the biggest drawback of AGP is that its very hard.. it not impossible to have two AGP slots, with PCI express its easy, and that brought back SLI/Crossfire which can be interesting technologies :)
 
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