I ordered a 15" MBP with the AMD Radeon Pro 460, from what I've read about the Pro 460 it's built with AMD's "Polaris" infrastructure, there's a lot about being able to plug and play AMD eGPU's, I was wondering if I purchased a Razer Core and a AMD R9, if I'd be able to simply plug it into the MBP and have it start using the the R9 for graphics instead of the Pro 460? on AMD's website they make it seem like it's as easy as that using "x connect"
There's a chance the AMD RX 480 and Fury series will work "better" with the 15" dGPU Touch Bar Pro, just due to drivers involved in eGPU especially if you are able to use it on macOS.
I am very curious if any owners of the new 15" with dGPU (and iGPU technically) got this to work. I can see it happening on a machine without a dGPU more easily than one with the Radeon 450-460 chips.
I don't think anyone has tried the new 15" dGPU with an eGPU, with or without Bootcamp.
First I guess you would want to disable automatic graphics switching as that will cause problems no doubt.
I would be impressed if it worked natively with macOS. I am interested in the Akitio Node as well, but curious how any of this works with the dGPU 15" as you would be seeing essentially three graphics sources (iGPU, dGPU & eGPU) at that point.
On Bootcamp - perhaps - but I would be very impressed with Apple frankly if they made it "easy" if at all possible to utilize the dGPU and an eGPU even on Windows. One can only wish, but knowing Apple I'd be shocked if this was possible at all. Not even sure if the dGPU and eGPU can work on the same machine.
In terms of the TB3 stuff, yes, it has to work with macOS and Apple's hardware specifically, which is slow and licensed among other things. Only then will you get the bidirectional TB3 recognition on macOS to allow the full 40Gbps. Right now there is basically nothing out there that is TB3 <-> TB3 on macOS. The OWC Dock is coming out in Feb 2017 per the last estimate and other manufacturers with TB3 devices are working to attempt to get them compatible with macOS (hence the many "not compatible YET" labels). Apple is very keen on allowing certain accessories with TB3 on their OS to work plug-and-play. I wish I could say I was surprised, but I'm not. It's what I would expect from Apple based on how they operate.
Anyways, if any new 15" Pro dGPU owners happen to have a way of trying an eGPU (would disable switching graphics before this if you are trying) via. TB3->TB2 / Razer Core would be awesome if we got some confirmation of success - at least on the current build of macOS...since that could be "fixed" by Apple anytime.