Update docs for installing CUDA/CUDNN (#16495)

* Update docs for installing CUDA/CUDNN

This fix addresses the issue raised in 16479 where
CUDA/CUDNN versions from the docs do not match TensorFlow v1.5.0.

From the Dockerfile and docker images ENV, the version of CUDA/CUDNN
for TensorFlow v1.5.0:
```
CUDA_VERSION 9.0.176
CUDNN_VERSION 7.0.5.15
```

This fix updates the doc so that CUDA version is changed from `8.0` -> `9.0`,
CUDNN version is changed from `6.0` -> `7.0`.

This fix fixes 16479.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

3 files changed, 11 insertions, 11 deletions

diff --git a/tensorflow/docs_src/install/install_linux.md b/tensorflow/docs_src/install/install_linux.md
index 03f12dff08..7289224572 100644
--- a/tensorflow/docs_src/install/install_linux.md
+++ b/tensorflow/docs_src/install/install_linux.md
@@ -31,13 +31,13 @@ If you are installing TensorFlow with GPU support using one of the
 mechanisms described in this guide, then the following NVIDIA software
 must be installed on your system:
 
-  * CUDA® Toolkit 8.0. For details, see
+  * CUDA® Toolkit 9.0. For details, see
     [NVIDIA's documentation](http://docs.nvidia.com/cuda/cuda-installation-guide-linux/#axzz4VZnqTJ2A).
     Ensure that you append the relevant Cuda pathnames to the
     `LD_LIBRARY_PATH` environment variable as described in the
     NVIDIA documentation.
-  * The NVIDIA drivers associated with CUDA Toolkit 8.0.
-  * cuDNN v6.0. For details, see
+  * The NVIDIA drivers associated with CUDA Toolkit 9.0.
+  * cuDNN v7.0. For details, see
     [NVIDIA's documentation](https://developer.nvidia.com/cudnn).
     Ensure that you create the `CUDA_HOME` environment variable as
     described in the NVIDIA documentation.
diff --git a/tensorflow/docs_src/install/install_sources.md b/tensorflow/docs_src/install/install_sources.md
index f494cc7a7c..0d99f9a47d 100644
--- a/tensorflow/docs_src/install/install_sources.md
+++ b/tensorflow/docs_src/install/install_sources.md
@@ -133,7 +133,7 @@ The following NVIDIA <i>hardware</i> must be installed on your system:
 
 The following NVIDIA <i>software</i> must be installed on your system:
 
-  * NVIDIA's Cuda Toolkit (>= 7.0). We recommend version 8.0.
+  * NVIDIA's Cuda Toolkit (>= 7.0). We recommend version 9.0.
     For details, see
     [NVIDIA's documentation](http://docs.nvidia.com/cuda/cuda-installation-guide-linux/#axzz4VZnqTJ2A).
     Ensure that you append the relevant Cuda pathnames to the
@@ -291,11 +291,11 @@ Do you wish to build TensorFlow with CUDA support? [y/N] <b>Y</b>
 CUDA support will be enabled for TensorFlow
 Do you want to use clang as CUDA compiler? [y/N]
 nvcc will be used as CUDA compiler
-Please specify the Cuda SDK version you want to use, e.g. 7.0. [Leave empty to default to CUDA 8.0]: <b>8.0</b>
-Please specify the location where CUDA 8.0 toolkit is installed. Refer to README.md for more details. [Default is /usr/local/cuda]:
+Please specify the Cuda SDK version you want to use, e.g. 7.0. [Leave empty to default to CUDA 9.0]: <b>9.0</b>
+Please specify the location where CUDA 9.0 toolkit is installed. Refer to README.md for more details. [Default is /usr/local/cuda]:
 Please specify which gcc should be used by nvcc as the host compiler. [Default is /usr/bin/gcc]:
-Please specify the cuDNN version you want to use. [Leave empty to default to cuDNN 6.0]: <b>6</b>
-Please specify the location where cuDNN 6 library is installed. Refer to README.md for more details. [Default is /usr/local/cuda]:
+Please specify the cuDNN version you want to use. [Leave empty to default to cuDNN 7.0]: <b>7</b>
+Please specify the location where cuDNN 7 library is installed. Refer to README.md for more details. [Default is /usr/local/cuda]:
 Please specify a list of comma-separated Cuda compute capabilities you want to build with.
 You can find the compute capability of your device at: https://developer.nvidia.com/cuda-gpus.
 Please note that each additional compute capability significantly increases your build time and binary size.
diff --git a/tensorflow/docs_src/install/install_windows.md b/tensorflow/docs_src/install/install_windows.md
index 8d0eb7966f..86a111c2ec 100644
--- a/tensorflow/docs_src/install/install_windows.md
+++ b/tensorflow/docs_src/install/install_windows.md
@@ -30,13 +30,13 @@ If you are installing TensorFlow with GPU support using one of the mechanisms
 described in this guide, then the following NVIDIA software must be
 installed on your system:
 
-  * CUDA® Toolkit 8.0. For details, see
+  * CUDA® Toolkit 9.0. For details, see
     [NVIDIA's
     documentation](http://docs.nvidia.com/cuda/cuda-installation-guide-microsoft-windows/)
     Ensure that you append the relevant Cuda pathnames to the `%PATH%`
     environment variable as described in the NVIDIA documentation.
-  * The NVIDIA drivers associated with CUDA Toolkit 8.0.
-  * cuDNN v6.0. For details, see
+  * The NVIDIA drivers associated with CUDA Toolkit 9.0.
+  * cuDNN v7.0. For details, see
     [NVIDIA's documentation](https://developer.nvidia.com/cudnn).
     Note that cuDNN is typically installed in a different location from the
     other CUDA DLLs. Ensure that you add the directory where you installed