CUDALink allows the Wolfram Language to use the CUDA parallel computing architecture on graphics processing units (GPUs).

If CUDALink is not working correctly, the most common root causes are:

• Your GPU is not CUDA-enabled with a sufficient compute capability. If your GPU is not listed on this webpage with compute capability 3.0+, then CUDALink will not work in Mathematica.
• The NVIDIA-distributed GPU driver on your machine is out of date. Please update to the latest driver for your specific GPU:
  
  Mac
  Windows
  Linux

  Note that your operating system’s automatic driver updating tool may not always have access to the latest version, so it is essential to check NVIDIA’s website directly.

• The CUDAResources paclet on your machine is out of date. Update it to the latest version by evaluating the following:

  PacletSiteUpdate /@ PacletSites[];
  Needs["CUDALink`"];
  CUDAResourcesInstall[Update -> True]  

  … from within your Wolfram System. Note that this functionality requires internet access.

The CUDALink setup tutorial provides further in-depth troubleshooting information if necessary.

If the issue still persists, please contact Wolfram Technical Support. In your support request, please include a notebook containing the output of the following code:

<< CUDALink`
CUDAQ[]
CUDADriverVersion[]
CUDAResourcesInstall[]
CUDAResourcesInformation[]
CUDAInformation[]
SystemInformation[]