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How to edit and maximize performance.

nate_c399e9f1nate_c399e9f1 Posts: 28
in Technical Help (nuts n bolts)
I've been using Daz for about 3 years now, but I haven't touched much of the settings in fear I would break something. In any case, I enabled GPU in render settings alonside CPU and I can get through some scenes pretty well. One thing I noticed though was while my CPU maxes out at 100%, my gpu only gets to about 6-12%. Is this normal? I tested this out on 3 separate computers so I suspect that's the default. If anything, I want to find a way to limit usage on CPU so I can work on other things while increasing GPU performance. Say for instance I want Daz to max out the CPU at 80% while working the GPU at 50% or more. Is this possible and is it a good idea? I run a Ryzen 2600X and dual GTX 980ti not in SLI, soon to upgrade to a RTX 2060.

Comments

  • Richard HaseltineRichard Haseltine Posts: 102,475

    If the CPU is at 100% it's likely that the GPU is not being used. However, if you are looking at the Windows Task Manager to assess things it won't, by default, be helpful - you need to tell it to show Compute_0 or CVUDA, if it's on offer, to see the Iray use. What driver do you have - right-click on the desktop>nVidia Control Panel? DS 4.12 needs at least 430.86.

  • nate_c399e9f1nate_c399e9f1 Posts: 28
    I'll check my drivers when I get the chance. If the drivers were released after 4.12 then I don't have them. What else should I do after I update the drivers? I'm guessing there would be more configurations after that, correct?
  • Richard HaseltineRichard Haseltine Posts: 102,475

    No, once you have the correct drivers that should be it - though it does seem that the version of Iray in 4.12 uses more memory on non-RTX cards than previous versions so you may still have some issues.

  • nate_c399e9f1nate_c399e9f1 Posts: 28
    Meaning that RTX would be better or that GTX is the best?
  • Richard HaseltineRichard Haseltine Posts: 102,475

    As I understand it the RTX card will have less memory used, at least up front - I don't know how much memory the RTX operations use within the GPU.

  • kenshaw011267kenshaw011267 Posts: 3,805

    From both my experiments and others statements, including people posting numbers in the benchmark threads, using both CPU and GPU may make a render take longer than running the render on GPU only.

  • nate_c399e9f1nate_c399e9f1 Posts: 28

    After updating my Nvidia drivers to the latest version(436.48), I ran two test benches on Daz 4.12 on the same scene.

    On the first render, I had my CPU(Ryzen 2700X Stock Clock) and dual GTX 980TIs enabled. The CPU still ran at 100% and the first GTX card jumped up and down from 6% to 15% while the second hovered around 4%, and the whole render took 2 minutes and 57 seconds to complete.

    On the second test I disabled the CPU and just used the cards for rendering. This resulted in my CPU running at a constant 25% to 28% while the first GPU kept spiking from 22% to 38% and sometimes 55%, though the second card stayed from 18% to 25%. That render only took 2 minutes and 56 seconds.

    Both times the video memory was using 4gb out of 6gb.

     

    Are these good results or are there better performance tweaks I can make to improve my timing?

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