Rogelio Serrano wrote:
is it possible to create a gpu that can use up to 1 gb of system memory?
Actually, the question is about the system bus. AFAIK, all flavors of PCI allow bus masters and would, therefore, allow a GPU on a card to access all system memory.
The problem is the question of the speed at which you could do it. The system bus becomes a bottle neck. Fast (66MHz) and wide (64 bit) PCI is going to be less than 533 MB/s -- how much less depends on how many addresses are issued.
If you are accessing textures as read only, you could use a cache on the graphics card to speed things up. Since PCI flavors do not provide for cache coherency, the cache would have to be cleared by the video driver when a new texture was loaded into main memory.
AGP specifically addressed this issue and does come in 8x and wide. IIUC, PCIe would be faster if you used 8x. I think that HTX is the real answer to this issue. -- JRT _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
