Steps to install Keras (Valid in June 2019)
1: Update Nvidia Drivers (at minimum, version 430)
https://www.geforce.com/drivers
2: Install CUDA 10.0 (Not 10.1)
https://developer.nvidia.com/cuda-toolkit-archive
3: Install CUDNN 7.4.1: To download the software, you will have to sign up for an Nvidia Developer account. https://developer.nvidia.com/rdp/cudnn-archive
Intermission: Install python 3.6 and create, and activate a virtual environment.
https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/
4: pip install tensorflow-gpu==1.13.1
5: pip install keras jupyter matplotlib