Shared displaylink + thunderbolt = Dual extrenal displays

Discussion in 'MacBook Pro' started by J273, Feb 24, 2011.

  1. J273 macrumors regular

    Nov 3, 2007
    One thing ive always wanted to do is use my MBP as my main machine powering my dual 30" panels.

    Do you think with the now hybrid thunderbolt/DP theres a chance with a future adapter the port would be able to drive the 2, daisy-chained at there native 2560 x 1600 with it supporting PCI-Express ?

    I know its asking alot from a single port but i was soo hoping for dual ports thunderbolt and display port with the option of running 2 external monitors.

    heres hoping future MBP upgrades they add the option with it being a pro machine.
  2. Fynd macrumors 6502

    Aug 11, 2010
    The 15-17" should be able to support 3 displays with Eyefinity this way, I would assume. I don't know about the HD 3000 though...
  3. Primetime89 macrumors member

    Feb 16, 2011
  4. J273 thread starter macrumors regular

    Nov 3, 2007
    Hmm thats interesting ....Just trying to figure out how it would work (if even possible) with my dual dell 30" Panels with me needing dual link adapters which i currently have...obviously im going to need some sort of adapter in the middle to chain the 2:confused:

    Edit: actually that wouldn't work a whole new adapter would be needed
  5. Benni-chan macrumors newbie

    Apr 29, 2010
    to daisy chain multiple devices, each device needs two ports (one to the previous device and one to the next device). so the displays would need two ports as well...

    i believe, the six devices are mainly storage devices... would be great to connect multiple displays, but can't see this coming.
  6. J273 thread starter macrumors regular

    Nov 3, 2007
    Yeah thats what i was thinking...maybe theres possibly a way with a 3rd party adapter with 1-in x 2-out that connects to the single thunderbolt port but extends to two.
  7. tirexstorm macrumors regular

    Oct 22, 2007
    perhaps it will be possible to run two Apple 27" displays since the use mini-display port(?)
  8. cbt macrumors newbie

    Sep 9, 2009
    Did any of you guys read this:


    "Ports with possibility.

    and then from

    Both 3. and 4. then go on to read "The 15- and 17-inch MacBook Pro support two displays; the 13-inch MacBook Pro supports one display."

    Whether thunderbolt in any way cripples displayport is the all important question, as displayport 1.2 supports upto 4 displays via either a hub or daisy-chaining! Why the 13" only supports one display, and the 15" and 17" two (and why not four?) I have no idea. Maybe its a restriction of mini displayport vs full size displayport?

    How we get access to the second display.. well that's an even bigger question!
  9. paxos macrumors newbie

    Feb 25, 2011
    Wow Nice, that raises my Hope that i can Power 2 Displays with the pro.

    Why only 15 and 17? Maybe because only those have 2 graphics cards
  10. wywern209 macrumors 65832


    Sep 7, 2008
    do you rly want to know?
    more than likely because only discrete gfx have the necessary horsepower to drive 2 high res displays simultaneously. more than 2 displays and you might saturate the thunderbolt bus. in order to hookup 4 displays, you need 17gbps of bandwidth. thunderbolt only supports 10.

    EDIT: on a more curious note, are there any thunderbolt enabled monitors coming out?
  11. paxos macrumors newbie

    Feb 25, 2011
    Man, i want to hook up two dvi displays to the Book. I guess theres no Way.

    Need a thunderbolt Hub with dvi out which is Not existing i guess?
  12. itsmeGAV macrumors regular


    Mar 11, 2010
    Bristol, United Kingdom
    Wouldn't surprise me if Apple where to create new adapters for the thunderbolt port, they're always thinking of something new, smart bastards. :eek:
  13. Evil Spoonman macrumors 6502

    Jan 21, 2011
    Is it possible? Yes. Is it something that will require some custom hardware? Yes. There is a limit today, as piping full frame video is quite bandwidth intensive. You certainly can't do six displays right now, two may be possible.
  14. eddified, Feb 25, 2011
    Last edited: Feb 25, 2011

    eddified macrumors newbie

    Sep 28, 2010
    It appears it is possible for the machines shipping in "au" (whichever country that may be, Australia?), as per cbt's post. However, those of us in the U.S. don't have that wording. See the U.S. versions here, neither of which mention using two monitors. :

    Another resource saying we can't thunderbolt doesn't do two monitors:

    It's looking like the U.S. folks don't get the best stuff!!

    EDIT: Maybe the U.S. version just hasn't been updated yet, or I'm getting a cached version (here's hoping!)
  15. barthq macrumors member

    Feb 22, 2011
    I noticed this too, also the german version i am looking at more or less clearly talks about only one display. Thats a bit strange.

    However, i have been researching this topic for a while now, also with older Macbooks and Thunderbolt will definatly make this possible in one form or another. If you can really drive 2x 30" which need Dual Link DVI might be questionable, but 2x 1920x1200 (usually found in 24inch displays) should work fine.

    Even if the Thunderbolt port itself wont support 2 displays, someone will create a solution for this. Even now there are numerous USB2DVI solutions which until now have been crippled by USB2 lows bandwidth, but this is changing with USB3. Look at this for example:

    I am very sure someone will come around with USB3 hubs for thunderbolt, so you will be able to plug in your monitors there, or use one native DisplayPort Monitor and then connect the other monitor to USB 3.0 via thunderbolt.

    I just hope there will be some kind of splitter to make 2 thunderbolt ports out of one, so you can connect one monitor to the displayport as you have been in the past and the other one over some thunderbolt -> usb3 -> dvi connect (while maybe they even do something directly without the need for USB inbetween). That way you atleast wont need to buy new displays ;)

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