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Zero GPU usage in 4.11

CamonraCamonra Posts: 22
in Technical Help (nuts n bolts)

I'm having a strange issue where the GPU is completely unloaded and the CPU is at 100% on Photoreal renders in 4.11.  I've turned off the CPU altogether, but then nothings renders.  I'm sure the new Strand Hair renders would be smoking if I could get the GPU involved in the the heavy lifting.

Comments

  • LeanaLeana Posts: 11,832

    What graphic card do you have, and do you have the latest drivers for it? Iray in 4.11 needs fairly recent drivers to work on the GPU.

  • CamonraCamonra Posts: 22

    Yeah, this has been working every day for over two years (I do a LOT of rendering daily and watch the GPU carefully).  This just started after my update to 4.11.  This is the GeForce GTX 1080 (Amp Extreme) with 8GB of RAM.

  • fastbike1fastbike1 Posts: 4,078

     Nvidia driver 418.81 or newer is required for Studio 4.11 Release.

  • CamonraCamonra Posts: 22

    Running 430+.  Still no GPU

  • felisfelis Posts: 4,673

    If you go to render > advanced. Does it then list your GPU and is it clicked.

    And if yes, does your log saying anything about your GPU?

  • TomCatOliverTomCatOliver Posts: 195
    Camonra said:

    Running 430+.  Still no GPU

    Did you check to make sure the correct nvidia drivers haven't been replaced by a windows update without you realizing?

  • Seven193Seven193 Posts: 1,111
    edited June 2019
    Your log file should tell you more than we can:

    Help -> Troubleshooting -> View Log File

    Post edited by Seven193 on
  • BJZelinBJZelin Posts: 2
    Camonra said:

    Running 430+.  Still no GPU

    I was having the same problem with my GTX 1050Ti. I was running a 2 year old driver that didn't work  so I upgraded the to 4.30 with no effect. I downgraded back to 4.19.67 and it works. Looks like there may be a sweet spot somewhere in the middle.

  • CamonraCamonra Posts: 22

    Seems like I did get a recent change to 4.30.  I moved back to 4.19.67, but I'm still seeing the same.  Switching the viewport to iray causes the 1080 to kick in and run, but clicking render kills the GTX 1080 and begins rendering over solely to the CPU.

  • CamonraCamonra Posts: 22

    Doing a Clean Install of the Zotac Driver (which looks like the Nvidia 430.86 WHQL International driver, but heh, maybe not).  Where do I export the logs?

  • CamonraCamonra Posts: 22

    Clean install and reboot, still no GPU when rendering, only active when viewport is changed to iray mode.

  • CamonraCamonra Posts: 22

    Rechecked the Nvidia settings and the card Globals where in Optimal Power.  I changed that to Maximum performance.  OK, now I'm seeing the GPU!  I guess in all the updating the Performance Setting was changed.  OK, guys lesson here appears to be check - and then recheck - your graphic card Globals and Application settings.

  • CamonraCamonra Posts: 22

    As a test, I enabled Optix Prime Acceleration, and that shut the GPU down as well.  Disabled Optix, and I'm back using the GPU.

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