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CPU renders instead of GPU (Sometimes) RTX 2070 Super

HalinorHalinor Posts: 6
in Technical Help (nuts n bolts)

Hi there guys,

i have already looked into topics on other forums but i did not find a solution that helps me with my problem.

I have set everything in DAZ Studio to render with my RTX 2070 Super does not take the rendering part.

First the CPU goes up to 100 % usage while it is writing the task, normally it goes back down to a minimum of 10-20 % to support DAZ.
But sometimes it just stays at 100 % usage and is rendering the scene, this takes than for an eternity 2-4 hours to finish. (instead of 15-30 Minutes)

Currently i am working on a scene again that only the CPU will render and i don´t know why.

Comments

  • HalinorHalinor Posts: 6

    I just looked into the Log File:

    rend warn : renderer iray has no more devices available. Postprocessing falling back to CPU.

  • HalinorHalinor Posts: 6

    2020-07-10 12:21:56.069 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Emitter geometry import (199 light sources with 131k triangles, 1 instance) took 0.004s

    2020-07-10 12:21:56.070 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating environment.

    2020-07-10 12:21:56.447 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating backplate.

    2020-07-10 12:21:56.448 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating lens.

    2020-07-10 12:21:56.448 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating lights.

    2020-07-10 12:21:56.448 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating object flags.

    2020-07-10 12:21:56.449 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating caustic portals.

    2020-07-10 12:21:56.449 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating decals.

    2020-07-10 12:21:56.475 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Allocating 1-layer frame buffer

    2020-07-10 12:21:56.494 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Using batch scheduling, caustic sampler disabled

    2020-07-10 12:21:56.494 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Initializing local rendering.

    2020-07-10 12:21:56.547 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Rendering with 1 device(s):

    2020-07-10 12:21:56.547 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : CUDA device 0 (GeForce RTX 2070 SUPER)

    2020-07-10 12:21:56.547 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Rendering...

    2020-07-10 12:21:56.547 Iray [INFO] - IRAY:RENDER ::   1.2   IRAY   rend progr: CUDA device 0 (GeForce RTX 2070 SUPER): Processing scene...

    2020-07-10 12:21:56.779 Iray [VERBOSE] - IRAY:RENDER ::   1.3   IRAY   rend stat : Geometry memory consumption: 983.577 MiB (device 0), 0.000 B (host)

    2020-07-10 12:21:56.780 Iray [INFO] - IRAY:RENDER ::   1.3   IRAY   rend info : Using OptiX version 7.1.0

    2020-07-10 12:21:56.835 Iray [INFO] - IRAY:RENDER ::   1.3   IRAY   rend info : Initializing OptiX for CUDA device 0

    2020-07-10 12:23:11.582 WARNING: ..\..\..\..\..\src\pluginsource\DzIrayRender\dzneuraymgr.cpp(353): Iray [ERROR] - IRAY:RENDER ::   1.3   IRAY   rend error: Unable to allocate 16777216 bytes from 3647076 bytes of available device memory

    2020-07-10 12:23:11.727 WARNING: ..\..\..\..\..\src\pluginsource\DzIrayRender\dzneuraymgr.cpp(353): Iray [ERROR] - IRAY:RENDER ::   1.2   IRAY   rend error: CUDA device 0 (GeForce RTX 2070 SUPER): Scene setup failed

    2020-07-10 12:23:11.852 WARNING: ..\..\..\..\..\src\pluginsource\DzIrayRender\dzneuraymgr.cpp(353): Iray [ERROR] - IRAY:RENDER ::   1.2   IRAY   rend error: CUDA device 0 (GeForce RTX 2070 SUPER): Device failed while rendering

    2020-07-10 12:23:11.865 WARNING: ..\..\..\..\..\src\pluginsource\DzIrayRender\dzneuraymgr.cpp(353): Iray [WARNING] - IRAY:RENDER ::   1.2   IRAY   rend warn : All available GPUs failed.

    2020-07-10 12:23:11.903 WARNING: ..\..\..\..\..\src\pluginsource\DzIrayRender\dzneuraymgr.cpp(353): Iray [WARNING] - IRAY:RENDER ::   1.2   IRAY   rend warn : No devices activated. Enabling CPU fallback.

    Which device memory does he mean? My graphic card RAM or the my general RAM?

  • HalinorHalinor Posts: 6

    I guess it means that the Memory usage is too much for the graphic card and thats why it falls back to the CPU hmm. Anyway i can solve this and rendering a complex scene anyway with the help of the GPU?

  • kenshaw011267kenshaw011267 Posts: 3,805

    You need to reduce the overall VRAM consumption. The easiest way is to reduce the size of the textures. There are several tools in the Daz store for that.

    I like Scene Optimizer

    https://www.daz3d.com/scene-optimizer

  • HalinorHalinor Posts: 6

    Hi there,

    thank you for your answer. I just remembered that i had bought the Scene Optimizer before but did not remember that.

    I tried it on the scene and now everything works fine. Yeah!

    Thank you very much for your help and time.

    Have a nice friday

  • DafaDafa Posts: 97

    Also, you can disable CPU Fallback in the lastest DAZ Studio update in Render Settings --> Advanced. That should prevent IRAY from falling back to CPU.

  • HalinorHalinor Posts: 6

    Hi Dafa,

    wow that´s nice i will search for it and try it when my current render is finished. Thank you.

  • HalinorHalinor Posts: 6

    Thanks again i found the button to disable the fallback. I guess it will abort the render now instead of falling back, but that is fine because i can now look if i can change something or if i will take the CPU to render the scene as a last resort.

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