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4.14 always fallback to CPU

gaiago57gaiago57 Posts: 20
in Technical Help (nuts n bolts)

Hi everyone, 

yesterday I've updated to Daz 4.14 and now Iray alwas switch on CPU rendring after a few seconds. It started on GPU and after, let's say, 30 iterations it goes on CPU. I can't render anything now. 

My GPU is a GTX 1070 and I tried with really low scenes, with 60% free RAM and 90% free GPU and it still render on CPU. If I uncheck the "allow CPU fallback" it just render an empty picture.

What can I do and is it possible to go back to 4.12 ? Maybe someone can send me the 4.12.1.118 zip file ?

 

Thanks 

Comments

  • Umi no Senshi no IshiUmi no Senshi no Ishi Posts: 317

    What driver do you have? I think 4.14 needs minimum of v451 . Mkae sure you get it from the NVIDIA site and don't depend on windows. Windows has a bad habit of installing it's own driver.

  • fixmypcmikefixmypcmike Posts: 19,580

    Have you updated your GPU drivers?

  • gaiago57gaiago57 Posts: 20

    Yes sorry my driver is 457.30

  • gaiago57gaiago57 Posts: 20

    I just contacted the technical support to see if they can send me a link to download the old 4.12.1.118 version because I can't find a solution yet and I need a working version as soon as possible.

  • MickyBeMickyBe Posts: 337
    edited November 2020
    gaiago57 said:

    Yes sorry my driver is 457.30

     

    I had a similar problem with updated driver used with 4.14;
    either card not recognized with black render screen, or cpu fallback and empty scene (I have nVidia GeForce GTX 1050 Ti).

    Solution for me was to install nVidia Studio Driver 456.38;
    untick CPU in Photoreal Mode & untick Allow CPU Fallback.

    Since, rendering is ok and no CPU fallback or empty / black scene.

    studio.jpg
    302 x 822 - 64K
    Post edited by MickyBe on
  • gaiago57gaiago57 Posts: 20
    MickyBe said:
    gaiago57 said:

    Yes sorry my driver is 457.30

     

    I had a similar problem with updated driver used with 4.14;
    either card not recognized with black render screen, or cpu fallback and empty scene (I have nVidia GeForce GTX 1050 Ti).

    Solution for me was to install nVidia Studio Driver 456.38;
    untick CPU in Photoreal Mode & untick Allow CPU Fallback.

    Since, rendering is ok and no CPU fallback or empty / black scene.

    Ok I'll try that thank you !

  • gaiago57gaiago57 Posts: 20
    MickyBe said:
    gaiago57 said:

    Yes sorry my driver is 457.30

     

    I had a similar problem with updated driver used with 4.14;
    either card not recognized with black render screen, or cpu fallback and empty scene (I have nVidia GeForce GTX 1050 Ti).

    Solution for me was to install nVidia Studio Driver 456.38;
    untick CPU in Photoreal Mode & untick Allow CPU Fallback.

    Since, rendering is ok and no CPU fallback or empty / black scene.

    So I tried and unfortunately it doesn't work, I have a black picture.

  • MickyBeMickyBe Posts: 337
    edited November 2020
    gaiago57 said:

    So I tried and unfortunately it doesn't work, I have a black picture.

    That's too bad, well try with the minimum required driver for DAZ Studio 4.14, nVidia Studio Driver 451.48 ...

    Here on my GTX 1050 Ti I tried first with driver 456.71 (black screen or empty render & card not recognized), then 451.48 (working ok) 
    and finally tested 456.38 (working ok).

     

    Post edited by MickyBe on
  • Richard HaseltineRichard Haseltine Posts: 99,423

    Have you tried using DDU to completely uninstall the drivers and then reinstall? Sometimes a bit gets left over, and that can confuse Iray.

  • fastbike1fastbike1 Posts: 4,077

    Nvdia Studio Driver 456.71 works for me Studio 4.14.0.8. I don't check CPU fallback. No issues with Render or Iray Viewport.

  • gaiago57gaiago57 Posts: 20
    Richard Haseltine said:

    Have you tried using DDU to completely uninstall the drivers and then reinstall? Sometimes a bit gets left over, and that can confuse Iray.

    I'll try thank you

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