Nvidia vs Amd for eGPU - feature wise

Is there any feature to either cards manufacturer to make one prefer Nvidia or Amd over the other when it comes to eGPU ?

do both allow playing games on the laptop screen without having to use an external screen ?

or is there a feature that makes one more suitable for eGPU solutions ?

I am planning for the future, and thinking of either:
- AMD RX 480
- Nvidia GTX 1060

and strongly leaning to Rx 480, because of better price and better dx12 and vulkan performance.

 

Performance wise idk if the RX 480 can beat this one out. The 1060 is just a higher priced card, idk if dx12 can make up for the difference in most titles.

 

I would seriously wait until you see those 2 cards tested in an egpu.

the reason is I believe a 480 is a 256 bit vs the 1060 is a 128 bit buss

because the egpu is going through pcie x4 the 1060 could have better performance.

 

The memory bus bandwidth is only that of the internal video memory though, as far as I know, so it shouldn't directly impact eGPU performance.

I have been looking at the exact same choice though, and so far here is what I have learned:

- In previous generations (I didn't find current tests) nvidia had a worse performance degradation at lower PCIe bandwidths

- AMD's DX11 CPU overhead is huge, which is likely to impact performance when using a low clocked mobile CPU regardless of PCIe bandwidth, so in current games the 1060 is significantly better

- Even in Vulkan, the RX 480 loses performance drastically when paired with weaker / lower clocked CPUs, as seen here with Doom (9m34s), but the 1060 doesn't:

- Also the 1060 could be used on the internal display (at the cost of about 10% performance), which makes the setup somewhat portable if necessary, but AMD cards only work with an external display

All this considered, with my 3.1GHz CPU I'm leaning towards the GTX 1060 for now.