I’m setting that particular cuda arch value because of this information, which lists it as having that compute capability:

  
      
      NVIDIA Developer – 4 Jun 12
  
  
    

CUDA GPUs 23

NVIDIA GPUs power millions of desktops, notebooks, workstations and supercomputers around the world, accelerating computationally-intensive tasks for consumers, professionals, scientists, and researchers. Find out all about CUDA and GPU Computing by...


  
  
    
    
  
  


The build did not work on another machine that I’ve used with a GeForce GTX 1080 Ti without setting the value to 6.1, so I figured I had to also set it for the Titan X (which is newer/more powerful). And it should support those archs according to the nvidia site right? How can I find which arch it can maximally support?