External thunderbolt 3 gpu and internal conflict

[Arch Stanton]

I don't have a solution for you, but man is eGPU via Thunderbolt a bag of hurt.  None of them "just work", especially if you're on a Mac.  Which is even more ridiculous since Apple have been championing Thunderbolt for a long time now.  Intel has been demonstrating eGPU since LightPeak days.

Try egpu.io and the tech inferno forums.  Might try netkas.org as well.

Let us know how you make out.