title: python : cannot import tensorflow-gpu
body: <p>I successfully created my tensorflow environment with Anaconda3 on my machine with the steps introduced on this <a href="https://www.tensorflow.org/install/install_windows" rel="nofollow noreferrer">link</a>. But when I try to try to do :</p>
  
  <pre><code>&gt;&gt;&gt; import tensorflow as tf
  </code></pre>
  
  <p>I get the following error messages : OSError and ImportError.</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Users\Froilan\Anaconda3\envs\tensorflow\lib\site-
  packages\tensorflow\python\platform\self_check.py", line 75, in preload_check
  ctypes.WinDLL(build_info.cudart_dll_name)
    File "C:\Users\Froilan\Anaconda3\envs\tensorflow\lib\ctypes\__init__.py", line 351, in __init__
  self._handle = _dlopen(self._name, mode)
  OSError: [WinError 126] This specified module could not be found
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "C:\Users\Froilan\Anaconda3\envs\tensorflow\lib\site-packages\tensorflow\__init__.py", line 24, in &lt;module&gt;
  from tensorflow.python import *
    File "C:\Users\Froilan\Anaconda3\envs\tensorflow\lib\site-packages\tensorflow\python\__init__.py", line 49, in &lt;module&gt;
  from tensorflow.python import pywrap_tensorflow
    File "C:\Users\Froilan\Anaconda3\envs\tensorflow\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 30, in &lt;module&gt;
  self_check.preload_check()
    File "C:\Users\Froilan\Anaconda3\envs\tensorflow\lib\site-packages\tensorflow\python\platform\self_check.py", line 82, in preload_check
  % (build_info.cudart_dll_name, build_info.cuda_version_number))
  ImportError: Could not find 'cudart64_80.dll'. TensorFlow requires that this DLL be installed in a directory that is named in your %PATH% environment variable. Download and install CUDA 8.0 from this URL: https://developer.nvidia.com/cuda-toolkit
  </code></pre>
  
  <p>Could it be something to do with my cpu? I use Ryzen 1700.
  + GPU : GTX 1050 Ti  - A bit inferior to 1080 ti or so.. but I've heard that GPU's would still be way better than CPU's. </p>