title: cudnn can't be install
body: <p>I am trying the <a href="http://deeplearning.net/tutorial/lenet.html" rel="nofollow noreferrer">LeNet5</a> on theano using cuda 8.0 windows 10 GTX 770M, and it seems the params cannot be updated correctedly. 
  When I import theano, I will get this error:</p>
  
  <pre><code>Can not use cuDNN on context None: cannot compile with cuDNN. We got this error:
  c:\users\yanjun~1\appdata\local\temp\try_flags_8n7fhy.c:4:19: fatal error: cudnn.h: No such file or directory
  compilation terminated.
  
  Mapped name None to device cuda: GeForce GTX 770M (0000:01:00.0)
  </code></pre>
  
  <p>I have installed cudnn 5 to my cuda 8.0 by copying the files to "NVIDIA GPU Computing Toolkit\CUDA\v8.0", but still the same error shows.</p>
  
  <p>Is it because theano cannot compile the cudnn， both <code>conv2d</code> and <code>pool_2d</code> cannot work properly？ As result， my error rate keeps around 90% while training. Did I install cudnn correctly? I just followed the <a href="http://deeplearning.net/software/theano/library/sandbox/cuda/dnn.htmlhttp://" rel="nofollow noreferrer">instructions</a> on theano's documentation, but no .so* file in the zip.</p>
  
  <p>I've tried the cpu mode, it can be trained properly but really really slow.</p>
  
  <p>Hope you guys could help me out of this where I am stuck for servel days.</p>
  
  <p>Many thanks!</p>