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I have a project that was rendering in cycles GPU compute just fine but at some point went wonky and now GPU Compute always fails. What steps can I take to get GPU compute working again?

I might be able to disable various layers and shaders until I find the culprit, but is there a better way then 'hunt and peck'? I am not very satisfied with CPU render.

I have two Nvidia GTX 1070Ti SLI cards and generally GPU compute works fine, but I've done something in my project that is causing issues. It was working with a 2048 tile size, and now that it's not working, even a tile size of 128 has the same issue.

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  • $\begingroup$ Windows Event log shows that the Driver is crashing and restarting. By exiting blender and restarting it and using 128 tile size, I was able to use GPU Compute. While not the answer I was hoping for, I now know that the issue seems to be something with the display driver. $\endgroup$
    – Jon
    Commented Feb 2, 2022 at 13:48

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I had a number of overlapping meshes/shaders as my project was very dirty. After I cleaned up unwanted/unneeded meshes/shaders everything started working great again. I think the take away is - keep my projects clean and crisp during development

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