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NUC6i7KYK - Dual monitor over Thunderbolt 3 via adapter or dock

idata
Community Manager
2,468 Views

A while back I purchased a NUC6i7KYK to use with a dual display port Thunderbolt adapter (StarTech TB32DP2) and two Dell U3415W monitors . This didn't work (only one monitor works at a time this way). As a workaround I had to use one of the other ports (mini DP or HDMI).

Intel tech support claimed that it isn't possible (though this limitation is not documented as far as I know). Any status on having this feature added so that we can use Thunderbolt adapters and docks that are coming onto the market?

1 Solution
idata
Community Manager
707 Views

Hello Kielby:

 

 

In regard to your inquiry, at this point there is no official information directly from Intel® stating that this feature will be added in the future.

 

 

On the following link you will be able to confirm that in fact when you use an adapter from thunderbolt to Display port, it will work just for one monitor, please look where it says "What's supported via Thunderbolt™ 3 on an Intel® NUC Kit NUC6i7KYK?" second line:

 

 

https://www-ssl.intel.com/content/www/us/en/support/boards-and-kits/000021752.html https://www-ssl.intel.com/content/www/us/en/support/boards-and-kits/000021752.html

 

 

Any questions, please let me know.

 

 

Alberto

 

View solution in original post

17 Replies
idata
Community Manager
708 Views

Hello Kielby:

 

 

In regard to your inquiry, at this point there is no official information directly from Intel® stating that this feature will be added in the future.

 

 

On the following link you will be able to confirm that in fact when you use an adapter from thunderbolt to Display port, it will work just for one monitor, please look where it says "What's supported via Thunderbolt™ 3 on an Intel® NUC Kit NUC6i7KYK?" second line:

 

 

https://www-ssl.intel.com/content/www/us/en/support/boards-and-kits/000021752.html https://www-ssl.intel.com/content/www/us/en/support/boards-and-kits/000021752.html

 

 

Any questions, please let me know.

 

 

Alberto

 

View solution in original post

idata
Community Manager
707 Views

Ok thanks, I don't think that page was available when I bought the NUC, but good to see the confirmation.

Is it possible to get an official answer if this feature is possible with the hardware and might be implemented in the future?

idata
Community Manager
707 Views

Hello Kielby:

 

 

In regard to your inquiry, there is not an official document stating that the feature will be added in the future or not, let me apologize for that, but if by any chance Intel® decides to add it, you will be able to see that information in our official web site:

 

 

http://ark.intel.com/ http://ark.intel.com/

 

 

Any questions, please let me know.

 

 

Alberto

 

Chris_V_Intel
Moderator
707 Views

Hey Kielby, the reason why it won't work is that due to the size and the layout of the NUC we were only able to route 1 signal to the Thunderbolt controller. Which means that when you use a Type C/Thunderbolt adapter to a splitter it is only able to provide 1 signal (see attached). However, if you were to have monitors that you could daisy chain, it should work if you go out of the first monitor in to the second monitor. I'll try it tomorrow to confirm.

idata
Community Manager
707 Views

Thanks for the technical info.

I'm not sure I can daisy chain these monitors @ 3440 x 1440 resolution.

Oh well, not the end of the world. I can deal with the extra cable.

idata
Community Manager
707 Views

Hello Kielby:

 

 

Thank you very much for that information.

 

 

Yes, that will be another option to try, to get an extra cable, besides the daisy chain configuration.

 

 

Any other inquiry, do not hesitate in contact us again.

 

 

Any questions, please let me know.

 

 

Alberto

 

Chris_V_Intel
Moderator
707 Views

Thanks Kielby, and I did confirm, you can daisy chain off another monitor connected via the TBT port.

idata
Community Manager
707 Views

Hi, what resolution were you able to daisy chain with? Would it work with dual 3440 x 1440? I will try it when I get the chance.

idata
Community Manager
707 Views

So I re-tested this today and it works great at the full 3440x1440 resolution on both monitors. I thought I had tested in the past and it didn't work so I was pleasantly surprised.

Tested setup:

NUC Mini DisplayPort (output) -> # 1 Dell U3415W DisplayPort (input) -> # 1 Dell U3415W DisplayPort (output) -> # 2 Dell U3415W Mini DisplayPort (input)

So in the near future I should be able to do this over the thunderbolt 3 dock as well (similar to your test).

Shows up properly in the Intel Graphics Control Panel under DisplayPort topology:

Thanks again for your help!

idata
Community Manager
707 Views

Maybe spoke too soon. It generally works, however from time to time the screens go blank for a second and then the desktop comes back.

At one point the chained screen did not come back (just showed black screen, monitor thought it was getting a signal). Had to unplug the DisplayPort cable and plug it back in to get picture.

Not sure how to troubleshoot that issue further. Is it a DisplayPort bandwidth issue?

JRoss8
Novice
707 Views

Well, welcome to the big problem. He is a 5 pages long thread with similar problem as yours

Chris_V_Intel
Moderator
707 Views

Kielby, thanks for the update and the information, I'm sorry you're having these issues. As Ran99 has said, others are having them as well, and I'm really trying to get to the bottom of this.

Can I ask if you're using the latest GFX driver?

https://downloadcenter.intel.com/download/26157 Download Intel® HD Graphics Driver for Windows 7*, 8.1*, and Windows® 10 for Intel® NUC Kit NUC6i7KYK

One more thing. The max resolution 2 monitors can support is 2560x1600 @ 60 Hz. See attached.

I got that from the TPS on this page: http://www.intel.com/content/www/us/en/support/boards-and-kits/000005545.html Technical Product Specifications for Intel® NUC Products page 18.

idata
Community Manager
707 Views

Hi, yes I am running the latest driver.

Chris_V_Intel
Moderator
707 Views

Thanks Kielby. As I said we're really trying to figure these GFX issues out. I will certainly update everyone when a solution is found.

hubick
New Contributor II
707 Views

Here is an interesting read: http://plugable.com/thunderbolt-3/support Thunderbolt 3 Support and Troubleshooting | Plugable

Dual display support is optional for Thunderbolt 3 PCs. How many displays are supported over Thunderbolt 3 depends on how the USB-C port has been wired on the system motherboard (up to a max of two), and is not changeable in software or by the Thunderbolt 3 graphics device.

Some systems may only be equipped with a single DisplayPort (DP) Alternate Mode (Alt Mode) line to the Thunderbolt 3 port which limits the port to a single display output. Due to this limitation some systems won't be able to take advantage of our dual port Thunderbolt 3 graphics adapters regardless of firmware/software updates. This is a physical hardware limitation.

Thunderbolt™ 3 Host System: Intel Skull Canyon NUC, Number of Supported External Displays: 1, Currently Supports Thunderbolt 3 Dual Adapters: Limited, Only one display is supported.

But where it gets really confusing is when you add http://www.displayport.org/cables/driving-multiple-displays-from-a-single-displayport-output/ DisplayPort Multi-Stream Transport (MST) into the mix.

Which, I think means, despite only having a single alt-mode connection, you can still use that single connection for multiple monitors via MST?

JRoss8
Novice
707 Views

hubick wrote:

Here is an interesting read: http://plugable.com/thunderbolt-3/support Thunderbolt 3 Support and Troubleshooting | Plugable

But where it gets really confusing is when you add http://www.displayport.org/cables/driving-multiple-displays-from-a-single-displayport-output/ DisplayPort Multi-Stream Transport (MST) into the mix.

Which, I think means, despite only having a single alt-mode connection, you can still use that single connection for multiple monitors via MST?

It depends on the display resolution - bandwidth required.

The NUC over TBT3 can only use ONE display regardless of its resolution.

DP over USB-C: It SHOULD use 3 displays 1920x 1080 or 2 display of 2560x1440. What is does is another story.

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