NVIDIA claims top DX9 GPU marketshare spot.

Discussion in 'Graphics and Semiconductor Industry' started by Jerky, Aug 1, 2003.

  1. StealthHawk

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    Check DX9 caps.

    With that said, I have heard that FP32 is once again enabled in 45.23 and 45.24 for the 5200, 5600, and 5800. Anyone here care to verify...or send me a gfFX card to test :lol:
     
  2. Clootie

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    I can confirm what all FX cards support FP32 in PS_2_0 with new official 45.23 drivers, along with FP16 in partial precision (PP) mode.
     
  3. Dave Baumann

    Dave Baumann Gamerscore Wh...
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    Clearly it didn't with the 44.03's.
     
  4. digitalwanderer

    digitalwanderer Dangerously Mirthful
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    I'm not disagreeing or questioning your statement here Dave, but how can you tell if it's doing fp32 or not?
     
  5. CorwinB

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    I'd say that you can check if FP32 is available by running custom code generating visible artefacts in FP16 (Mandlebrot ?), and coded without specifying _PP...
     
  6. Tridam

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    It's rather simple if you code your own shader. You can use a shader to mathematically check the epsilon (precision) and the range. The epsilon gives you the mantissa and the range gives you the exponent.

    With det 44.03, FX5800, 5600 and 5200 were always doing FP16, with or without _pp. But this is not the case with det 45.23. Without _pp we have FP32.
     
  7. digitalwanderer

    digitalwanderer Dangerously Mirthful
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    Oh, ok....I get ya now. You do some things that are totally above me head and beyond my current scope-o-understanding and find out that way.

    How 'bout next time you just say "magic!", it's close enough for me little brain and it'll save you some typing. ;)
     
  8. Reverend

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    I can verify that.
     
  9. Clootie

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    Yes it's easy - Pixel Shader 2.0 precision
     
  10. Tridam

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    This software just check the registers and coordinates data type. It doesn't check the precision of the units !

    IE : this software say that Radeon 9700/9800 use s23e8 registers. But every precision and range test will show you that Radeon do calculations in the s16e7 format. This software doesn't say that ;)


    [EDIT] : Sorry, it was an error of mine :oops: The software shows s16e7 for Radeons as expected.
     
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