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I read that the 2 ports on the left and right are actually slightly different. I don't recall exactly what it was but I think it was something about Thunderbolt
by Osiris 10y ago
I read that the 2 ports on the left and right are actually slightly different. I don't recall exactly what it was but I think it was something about Thunderbolt 3 because of a lack of sufficient PCI-E lanes for all four ports.
- manarth 10y agoOfficial Apple comment: The two right-hand ports deliver Thunderbolt 3 functionality, but have reduced PCI Express bandwidth [1] The full Thunderbolt 3 speed is 40MBPs (use the left-side ports to achieve that). I can't find any official document which clearly states the speed of the reduced-functionality ports, but Apple also state this: All late-2016 MacBook Pro models deliver USB 3.1 Gen 2 (10 Gbps) performance on all Thunderbolt 3 ports [1] So there may be a 4x speed differential, depending which port you plug into. [1] https://support.apple.com/en-us/HT207256 https://support.apple.com/en-us/HT207256