I started training about 24 hours ago with a single i7 860 (2.8ghz) and it's still running, but I'm watching the loss going down so I think it might wrap up within a day or two.
The machine I'm using has an Nvidia GTX 970, but I failed to enable CUDA in the TensorFlow installation so it's not using it. When I noticed that I decided just to let it run and then, when it finishes, train it again with the GPU and compare.
