2016 MBP13 nTB Thunderbolt 3 20gb/s?

[MrX8503]

Anyone get 20gb/s under Thunderbolt in system report? Shouldn't it say 40gb/s?

 

[keviig]

I suspect the 2 ports might be sharing 1 TB3 controller, hence the reduced bandwidth.
That's the case for two of the four ports on the 13" tbMBP, so could be the same for the nTB.

Edit: Getting 20 Gb/s on all my ports via system report on my 15" too, weird.

 

[MrX8503]

I suspect the 2 ports might be sharing 1 TB3 controller, hence the reduced bandwidth.
That's the case for two of the four ports on the 13" tbMBP, so could be the same for the nTB.

Edit: Getting 20 Gb/s on all my ports via system report on my 15" too, weird.

That's weird. Well if yours say 20Gb/s too, then I guess that's normal behavior.

 

[theitsage]

You need to attach a Thunderbolt 3 device for it to show 40 Gb/s 1x.

 

[keviig]

You need to attach a Thunderbolt 3 device for it to show 40 Gb/s 1x.

That must be it then! Mystery solved I don't have any TB3 devices yet, only USB C stuff (LG 4k) so can't test it myself.

 

[sidewinder]

Here are two images showing what I see on my System. Note that all Thunderbolt ports show 40 Gb/s except the port that has the ThunderBay 4 which is a Thunderbolt 2 device.

Note: I disconnected the ThunderBay 4 so there were no devices plugged into the right side USB-C connectors and both Thunderbolt ports reported 40 Gb/s.