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Linh Ha avatar image
Linh Ha asked ·

Why my CPU still work 100% even when I use Anorld render GPU, but my GPU just work only 1%?

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Thiago Ize avatar image
Thiago Ize answered ·

Can you check the logs to see if GPU is actually being used?

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Where can I check now? Can you show me? When I’m setting it, I already choose this option, but it still not work like I want it to be, so did I choose wrong or missing somthing? So sorry because I’m not good at this, pls help me, tks bro

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Which DCC/plugin are you using? There's instructions for maya and c4d here:

https://docs.arnoldrenderer.com/display/A5AILIC/Check+the+Arnold+Log

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Michael Long avatar image
Michael Long answered ·

In the GPU tab on the task manager, click on the label for one of your graphs (Copy, Video Encode, Video Decode, etc) and switch it to show CUDA. I found that my CUDA utilization was consistently between 100% and ~70% when rendering, which makes sense if Arnold is just using CUDA (speculation on my part), and means my card (1080 ti) was just about maxed out. With my CUDA cores at 100%, Windows was still reporting the overall GPU at like 3%, so it seems like Windows just doesn't approximate utilization in the way we'd like it to for Arnold.

Since you have a 2070, it may be using Tensor cores alongside/instead of CUDA, so you may have the option to show Tensor cores in task manager? I can't speak for that, but dig around.

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Stephen Blair avatar image
Stephen Blair answered ·

The Windows Task Manager isn't reliable for Arnold GPU, use another tool, like GPU-Z to monitor the GPU usage

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