}}
==Final Decision==
We decided to clone the NVIDIA DIGITS DevBox: https://developer.nvidia.com/devbox
To start with we are trying to use our existing ASUS Z10 server board, rather than switching to the Asus X99-E WS workstation class motherboard, and rather than Four TITAN X GPUs, we've got a TITAN XP and a TITAN RTX.
Note that the Asus X99-E WS is available from NewEgg for $500 now.
==Single vs. Multi GPU==
*[https://www.nvidia.com/en-us/geforce/products/10series/geforce-gtx-1080-ti/ GTX 1080 Ti Specs]
* Since we are using Tensorflow, it doesn't scale well to multiple GPUs for a single model