failed to open dynamic library nvcuda.dll

It seems that a lot of GPU problems revolve around specific versions of drivers. Though AMD has their own support structure, you can often learn from information reported by others who fold.

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failed to open dynamic library nvcuda.dll

Postby Demose » Thu Aug 23, 2018 2:46 pm

folding at home is only using 2% of my GPU and when I go to the system info tab the error :Not detected: Failed to open dynamic library 'nvcuda.dll' : The specified module could not be found.
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Re: failed to open dynamic library nvcuda.dll

Postby bollix47 » Thu Aug 23, 2018 3:01 pm

You don't need any nvidia .dll files since you're using an AMD GPU. Where are you seeing the 2% usage? If it's in windows task manager that's more than likely the amount of CPU being used by folding to feed your GPU. Use GPU-z to see the actual GPU usage.
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Re: failed to open dynamic library nvcuda.dll

Postby Demose » Thu Aug 23, 2018 3:53 pm

OK according to GPU-z it is using 100%, so what is up with that error message?
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Re: failed to open dynamic library nvcuda.dll

Postby bollix47 » Thu Aug 23, 2018 4:07 pm

It's not an error message ... it's an information message telling you that your GPU does not support CUDA which is quite correct since CUDA is an nvidia language, not AMD. We don't use it at this point on either since we're using opencl but we did in the past and may in the future, just not on AMD GPUs. They will either continue to use opencl or maybe something else.
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Re: failed to open dynamic library nvcuda.dll

Postby Joe_H » Thu Aug 23, 2018 6:29 pm

In addition, for nVidia setups that message is an important one for debugging purposes. The driver installers from nVidia install OpenCL support as part of the same bit that installs CUDA support. So if CUDA is missing, and it is a nVidia GPU, OpenCL is also probably not properly installed.
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