Newbie question: What are the prerequisites for running PyTorch with GPU? 
  
  
    Hi everyone, I’m new to deep learning libraries, so apologies in advance if this is something I’m already supposed to know. 
I’ve used Theano before but guides for setting up the GPU there were very straightforward, also I was doing this using a WinPy instance on Windows. I come from a MATLAB background where I’m used to being able to play around with the variables and initialize things quickly, so naturally I felt like PyTorch may have more to offer. 
But there isn’t that much documentation on …
  


As we known,pytorch has its own built-in cuda
But if i have installed cuda in my local machine
and now when i install pytorch ,whether pytorch use its built-in cuda or detect the cuda in my machine??