title: nvcc fatal : Unsupported gpu architecture 'compute_20' while cuda 9.1+caffe+openCV 3.4.0 is installed
body: <p>I have installed <code>CUDA 9.1+cudnn-9.1+opencv 3.4.0+caffe</code>. </p>
  
  <p>When I tried to run <code>make all -j8</code> in <code>caffe</code> directory, this error occurred:</p>
  
  <blockquote>
    <p>nvcc fatal   : Unsupported gpu architecture 'compute_20'</p>
  </blockquote>
  
  <p>I have tried to run:</p>
  
  <p><code>"cmake -D CMAKE_BUILD_TYPE=RELEASE  -D CUDA_GENERATION=Kepler .."</code> </p>
  
  <p>but it didn't work.</p>