HOW TO INSTALL TENSORFLOW-GPU 1.5.0, 1.7.0, 1.8.0 AND 1.9.0 ON WINDOWS 10 ?

https://tolotra.com/2018/07/24/how-to-install-tensorflow-gpu-1-5-0-and-1-7-and-1-8-0-on-windows-10/#First_time_step_and_Biggest_challenge_Installing_CUDA_toolkit_9

https://medium.com/@kelfun5354/step-by-step-guide-to-install-tensorflow-cpu-gpu-for-windows-7-b472327984cd

with tf.Session() as sess:
     with tf.device("/cpu:0"):

To make GPU invisible

export CUDA_VISIBLE_DEVICES=""

To return to normal

unset CUDA_VISIBLE_DEVICES