A few days ago, I updated my Windows 10 to version 1709 and found out that Microsoft added the GPU monitor in the Task Manager which I thought is awesome for ML developers and researchers.
Here is a screen capture of the official MNIST codes running Tensorflow-GPU on my Desktop. It is clear to see that the GTX 960 uses about 3.5GB memory out of 4.0GB to train the ConvNets, which is much faster than the CPU computing.
You can find more models from the TensorFlow Models. This repository contains a number of different models implemented in TensorFlow.