Well we can shorten that list if you're able to write your models in tensorflow 1.15 to: Windows 10 and Python 3.6+. Microsoft has done something quite interesting with tensorflow-directml [0, 1]. A friend is training convolutional networks on a Ryzen 5 3500u ultrabook, at about the same speed my old notebook with a GeForce 940mx could. I'm tempted to test it on a 4600H when I have a bit of time, it could be interesting if the iGPU is able to access a large portion of the 24GB of RAM that system has.

[0] https://pypi.org/project/tensorflow-directml/

[1] https://docs.microsoft.com/en-us/windows/ai/directml/gpu-ten...