Erro de importação do Tensorflow

Estou tentando instalar o tensorflow que suporta GPU.

Eu tentei as informações no seguinte link

CUDA® Toolkit 8.0cuDNN v6.0Placa GPU com CUDA Compute Capability 3.0 - GeForce 940MX

Então usadopip3 install --upgrade tensorflow-gpu para instalar o tensorflow.

Mas estou recebendo o seguinte erro ao tentar importar o fluxo tensor.

    Traceback (most recent call last):
      File "C:\Research\Python_installation\lib\site-packages\tensorflow\python\platform\", line 75, in preload_check
      File "C:\Research\Python_installation\lib\ctypes\", line 347, in __init__
        self._handle = _dlopen(self._name, mode)
    OSError: [WinError 126] The specified module could not be found

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "<pyshell#6>", line 1, in <module>
        import tensorflow as tf
      File "C:\Research\Python_installation\lib\site-packages\tensorflow\", line 24, in <module>
        from tensorflow.python import *
      File "C:\Research\Python_installation\lib\site-packages\tensorflow\python\", line 49, in <module>
        from tensorflow.python import pywrap_tensorflow
      File "C:\Research\Python_installation\lib\site-packages\tensorflow\python\", line 30, in <module>
      File "C:\Research\Python_installation\lib\site-packages\tensorflow\python\platform\", line 82, in preload_check
        % (build_info.cudart_dll_name, build_info.cuda_version_number))
    ImportError: Could not find 'cudart64_90.dll'. TensorFlow requires that this DLL be installed in a directory that is named in your %PATH% environment variable. Download and install CUDA 9.0 from this URL:

Alguém pode me aconselhar sobre como usar isso.