eGPU Question

[Grohowiak]

Im new in this area and trying to figure out one thing.
If I get a eGPU for my 2017 iMac and pretty much permanently use it to run with internal display, will I still be able to connect external display to iMacs tb3 port and have it powered with internal 570 card?

Cheers

 

[SecuritySteve]

Yes. But running an eGPU on the internal display will have a high performance tax. The issue is TB3 does not have enough bandwidth to handle the passthrough to the CPU and back. We need a dual-channel TB3 solution to get internal monitor performance up to par. Such a solution does not exist yet. Do not buy an eGPU for use on an internal monitor, unless the internal monitor's resolution is 1920x1080.

 

[Grohowiak]

Yes. But running an eGPU on the internal display will have a high performance tax. The issue is TB3 does not have enough bandwidth to handle the passthrough to the CPU and back. We need a dual-channel TB3 solution to get internal monitor performance up to par. Such a solution does not exist yet. Do not buy an eGPU for use on an internal monitor, unless the internal monitor's resolution is 1920x1080.

Thx a lot. That seals it for me. No go.