title: External GPU for machine learning
body: <p>I own MacBook Pro 15' Mid 2014 and I am thinking about buying Titan X GPU to speed up training of my neural networks. Titan will be connected via Thunderbolt 2 as an external GPU.</p>
  
  <p>What sort of performance can I expect from this setup - will it be the same as if it was connected to the motherboard? Does the thunderbolt limit the speed of the GPU?</p>