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Thread: ATI Radeon HD 4000 Series discussion

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  1. #1
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    Extelleron: But the 800 SP case doesn't make much sense, too. It means a 2.5x increase in shading performance, while texture fillrate only increases less than 2x. This makes no sense, because R600 and RV670 were mainly texture fillrate bound.

  2. #2
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    Quote Originally Posted by annihilat0r View Post
    Extelleron: But the 800 SP case doesn't make much sense, too. It means a 2.5x increase in shading performance, while texture fillrate only increases less than 2x. This makes no sense, because R600 and RV670 were mainly texture fillrate bound.
    It might be possible that 32 TMUs @ 750MHz is enough texture power for modern games and additional texture power would prove unnecessary.....I don't know if that makes any sense, but it's a possibility. Remember that 32 TMUs @ 750MHz gives it significantly more texture power than G80 parts.... so is it really not enough?

    Also remember that AMD developed the specifications for R700 parts years ago.... perhaps at that time they thought that games would be extremely shader bound by 2008 and that they would not need as much texture power.

    It could be that the shader power is for another purpose as well. Additional shader power could be there to make physics processing possible without hurting performance that much. It's also likely that AMD wants to have good performance in apps that use the shaders.... like F@H and other commercial applications for GPUs. These would not care about texture units, only about stream processors.

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