NVidia Tegra ULP GeForce Speculation

Discussion in 'Mobile Graphics Architectures and IP' started by TimothyFarrar, Feb 13, 2009.

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  1. TimothyFarrar

    TimothyFarrar
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    As for small triangles, I wonder what SGX is doing different than the MBX to improve peak tri rates per MHz?

    I thought that the MBX was a 32x32 pixel tile size with a parallel 32x1 pixel tile line of parallel triangle equation and depth test per clock. Also I thought the peak rates on some white paper were in the order of 7 Mtri/sec at 200 MHz, which is about one triangle every 32 clocks. So perhaps every triangle regardless of size runs through the full 32x32 pixels per tile for triangle equation and depth test.

    Isn't SGX to be on the order of up to 16 or so times the peak triangle throughput of the MBX per MHz? So do they now process any triangle per clock for triangle equ/visibility, and likely a block of pixels rather than a tile scanline?
     
    #21 TimothyFarrar, Mar 3, 2009
  2. Simon F

    Simon F Tea maker
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    a) MBX doesn't do that and b) I'm not sure the tile size is that large on MBX.
     
    #22 Simon F, Mar 4, 2009
  3. Ailuros

    Ailuros Epsilon plus three
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    Yep. The problem is that they don't mention die sizes anymore for MBX.

    I'd guess that MBX might work with 32*16 tiles.
     
    #23 Ailuros, Mar 4, 2009
    Last edited by a moderator: Mar 4, 2009
  4. Lazy8s

    Lazy8s
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    Not 32x8?

    I figured Series5XT was where the size was bumped to 32x16.
     
    #24 Lazy8s, Oct 17, 2009
  5. Grumpy

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    I thought the 543 was 32x32 and everything prior to that was 32x16
     
    #25 Grumpy, Oct 17, 2009
  6. Ailuros

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    Well it's definitely smaller than 32*32. Also are you sure you'd want fixed (macro or micro) tile sizes for something like Series5XT?

     
    #26 Ailuros, Oct 17, 2009
  7. rpg.314

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    Does anyone here know anything about the GPU core in Tegra2? Any hints, info, rumours, speculation ....
     
    #27 rpg.314, Oct 17, 2009
  8. Ailuros

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    Well it's definitely neither a GeForce 6 nor GeForce 9 equivalent as BSN is mentioning.
     
    #28 Ailuros, Oct 18, 2009
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