ThunderBolt 3 port and USB-C


#1

Do someone know, if TB3 port supports USB-C too. I know that USB-C (second port supports it) + it supports charging. But how it is with TB3? Is it TB3 only + charging or TB3+USB-C+charging?


#2

The thunderbolt Port is for charging and USB 3.1 (top one)
And the bottom one is just USB C 3.1

And you can charge through both ports with USB-PD.


#3

Yep you can charge from both ports! And charging is as fast from both. And yeah Alex your answer is right:)


#4

I did know that. My question was - is the TB3 port - TB3 only or it can support TB3 and USB-C (like some other devices)?

OK - I see - by Alex it is both TB3 and USB-C for TB3 port - thanks a lot.

I was asking - if I can use 2 USB-C devices together (2 ports).


#5

The upper port is both, TB3 AND USB-C 3.1
You can use it like any normal USB-C Port but additionally you have all the TB3 functions too. If you do not have a TB3 device you can just use any USB-C port :smiley: If you want to connect for example a TB3 Dock or eGPU than you would need to use the upper port.

@Konstantinos Thanks for pointing that out :slight_smile:


#6

To clarify: USB C is the port itself (the mechanics).

On top of that go the different supported features/protocols. Both ports support USB 3.1 (data), USB PD (power), DisplayPort (display), but only the upper port supports TB3 (external PCIE).

Docks and Hubs don’t necessarily need TB3. I plan for a USB-C dock (with DP) at work and a TB3 eGPU dock at home.


#7

If I plug both to a separate chargers at the same time, do I charge twice as fast?


#8

No, you cannot. But it would be great.


#9

No, since the bottle neck with today’s charging isn’t with how much power the charger can provide. It is how much the battery can receive, without compromising safety and life time of the battery.
Feeding the V with twice the power would perhaps give shorter charging time, I’m not sure. But it would, most definitely be unsafe, and reduce the battery’s capacity in the future.


#10

It is an interesting question. Not exactly two chargers, but how the EVE V would handle two power sources connected to the two different ports. Like a battery pack and a charger. Does it use the stronger or has one of the ports priority?


#11

I think @Patrick_Hermawan just made a joke here :wink:


#12

So… just to make sure I understand this right.

IF Thunderbolt 3 can do everything that a regular USB-C 3.1 port can AND MORE, why not just have 2 Thunderbolt 3 ports?


#13

Dare I say that this is what I do not understand either?


#14

IIRC it’s because the low voltage CPUs from Intel, the ones we’re using, only supports one Thunderbolt port.


#15

Very simple - every Thunderbolt 3 port needs 4 PCIe lanes from the CPU to have it’s full potential - however Core Y does only support I think 10 lanes, thus we’d have to limit the other Thunderbolt ports to 2x PCIe lanes each which would limit the performance of the eGPU or other things :wink:
There were also some other limitations which I don’t know of the top of my head right now, but we’ve definitely thought about it, but unfortunately could not implement it.


#16

Fair enough.
Gonna go back to dwell on the forums to find more stuff about how U compares to Y :smiley:
[or rather how Y compares to U and heat stuff]


#17

Double Port (DSL6540)?

Not even DSL6540+JHL6240 ?

(yes, yes, I know, you would, if you only could, but I am curious about the details):confused::disappointed:


#18

I’d love to spill all the beans regarding the DSL6540 / JHL6240 and tell you exactly why we did chose the current implementation, but I’m honest - I don’t know as I was not too involved with the development of the PCB (read: Not involved at all)

And while I don’t know the specifics, here’s the thing - they’d still need more PCIe lanes to the CPU to provide enough bandwidth for both ports, because otherwise we’d have 2 TB3 ports that both run with 20 GBit/s at best as far as my knowledge goes (and that is unfortunately not too deep :frowning: )