I have a late 2016 MacBook Pro 15 inch that, to my knowledge has 4 Thunderbolt 3 ports (two on each side). I have two LG Ultrafine 5K monitors. When I connect them to one port on either side of the computer, they work just fine and I can see them connected to individual Thunderbolt buses in my system information:
When I connect them to the ports on the same side, I get no picture in one of them. Doesn't matter which one, whichever I connect second, doesn't get a picture. But, my system information shows them both connected to a Thunderbolt bus.
Has anybody tried this? I realize that the one bus may not have the bandwidth, but it was my understanding that this particular model has 4 fully functional thunderbolt 3 ports and it looks like each display is getting the necessary bandwidth.
Although now that I'm looking at that diagram, it shows one display on each side of the computer, ha!