Tensor flow toggle between CPU/GPU

Question

Having installed tensorflow GPU (running on a measly NVIDIA GeForce 950), I would like to compare performance with the CPU.

I am running the tensorFlow MNIST tutorial c

Answer 1

To turn off GPU, simply add this at the top of your script.

import os
os.environ["CUDA_VISIBLE_DEVICES"] = "-1"

(Comment it out when you want to use the GPU again)