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Is there any quick command or script to check for the version of CUDA installed?
I found the manual of 4.0 under the installation directory but I'm not sure whether it is of the actual installed version or not.
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(or /usr/local/cuda/bin/nvcc --version ) gives the CUDA compiler version (which matches the toolkit version).
You can verify that you have a CUDA-capable GPU through the Display Adapters section in the Windows Device Manager. Here you will find the vendor name and model of your graphics card(s). If you have an NVIDIA card that is listed in http://developer.nvidia.com/cuda-gpus, that GPU is CUDA-capable.
The first way to check CUDA version is to run nvidia-smi that comes from your Ubuntu 18.04's NVIDIA driver, specifically the NVIDIA-utils package. You can install either Nvidia driver from the official repository of Ubuntu, or from the NVIDIA website. You will see similar output to the screenshot below.
As Jared mentions in a comment, from the command line:
nvcc --version (or /usr/local/cuda/bin/nvcc --version) gives the CUDA compiler version (which matches the toolkit version).
From application code, you can query the runtime API version with
cudaRuntimeGetVersion() or the driver API version with
cudaDriverGetVersion() As Daniel points out, deviceQuery is an SDK sample app that queries the above, along with device capabilities.
As others note, you can also check the contents of the version.txt using (e.g., on Mac or Linux)
cat /usr/local/cuda/version.txt However, if there is another version of the CUDA toolkit installed other than the one symlinked from /usr/local/cuda, this may report an inaccurate version if another version is earlier in your PATH than the above, so use with caution.
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