ATI RS690T to have dedicated graphics memory

Posted on Friday, Dec 08 2006 @ 01:18 CET by Thomas De Maesschalck
The ATI RS690T chipset, which features an integrated version of the X700 GPU, will feature some dedicated graphics memory to boost performance.
This is mainly to get around a major limitation of the K8 platform: lower memory latency to the CPU comes at the expense of higher memory latency to the integrated GPU on the north bridge. Instead of talking to the RAM directly, as on an Intel GMCH, AMD chipsets must look over the HT bus to the memory controller on the CPU, which can badly decrease performance of integrated graphics. Which aren't exactly the best performing devices in the world anyway.

RS690T uses the pins of the chipset normally dedicated to the PCIe x16 interface for this and, we believe, can support up to 128MB of local frame buffer albeit through a fairly narrow interface. Of course, being targeted at laptop designers, it's incredibly unlikely that there will be a need for the strongest performance integrated graphics, and an external graphics controller at the same time, so it sounds a reasonable compromise.

About the Author

Thomas De Maesschalck

Thomas has been messing with computer since early childhood and firmly believes the Internet is the best thing since sliced bread. Enjoys playing with new tech, is fascinated by science, and passionate about financial markets. When not behind a computer, he can be found with running shoes on or lifting heavy weights in the weight room.

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