Can A Retina Imac Drive 2 External Thunderbolt Displays?

Discussion in 'iMac' started by RoastingPig, Oct 21, 2014.

  1. RoastingPig, Oct 21, 2014
    Last edited: Nov 9, 2014

    RoastingPig macrumors 68000

    RoastingPig

    Joined:
    Jul 23, 2012
    Location:
    SoCal
    #1
    I don't see anywhere on apples website about driving 2 external displays, only a small specification where it says it can drive an external 4k display. can anyone confirm it can run 2 external display without the already toasty AMD m295 catching on fire. Sarcasm obviously but thats allot of stress on a mobile gpu to push a 5k display plus 2 1440p displays simultaneously.
     

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  2. kendrickhphoto macrumors member

    Joined:
    Jan 20, 2011
    #2
    I will be running it with a 27" Cinema display and a Thunderbolt display and I will let you know if it catches on fire or anything.
     
  3. RoastingPig thread starter macrumors 68000

    RoastingPig

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  4. Chuck Rodent macrumors member

    Chuck Rodent

    Joined:
    Jan 9, 2014
    #4
    According to the Apple support website:

    FAQ 18
    If you connect a 60Hz multi-stream transport (MST) 4K display to an iMac (Retina 5K, 27-inch, Late 2014) computer, only one additional Thunderbolt display is supported.

    Otherwise it is listed as supporting 2 TBD.

    http://support.apple.com/en-ca/HT5219
     
  5. kendrickhphoto macrumors member

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    Jan 20, 2011
    #5

    Yes, mine is powering my Thunderbolt Display and 27" Cinema Display just fine.

    [​IMG]
     
  6. dragon529 macrumors member

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    Jul 16, 2008
    #6
    What TB display are you running?
     
  7. Wiggle macrumors member

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    Nov 2, 2014
    #7
    There's more than one TB display?
     
  8. kendrickhphoto macrumors member

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    Jan 20, 2011
    #8
  9. tillsbury macrumors 65816

    Joined:
    Dec 24, 2007
    #9
    The answer is yes. The only thing it can't do is run two external 4k displays.
     
  10. RoastingPig, Jan 8, 2015
    Last edited: Jan 8, 2015

    RoastingPig thread starter macrumors 68000

    RoastingPig

    Joined:
    Jul 23, 2012
    Location:
    SoCal
    #10
    anyone seeing performance issues with this setup? how would editing a 1080p file on one thunderbolt display in full screen final cut x and on the other display watching a 1080p youtube video and on the retina browsing the web all fair when doing simultaneously?
     
  11. edjrwinnt macrumors member

    Joined:
    Mar 8, 2008
    Location:
    North Ridgeville, Ohio
    #11
    I had a 28" 4k Dell and a Asus 1920 x 1200 connected via thunderbolt and it worked okay, but mission control was slow. I then connected the Asus via a usb3 video adapter and things seemed a little faster. Now 10.10.2 beta 4 seems even faster, and at some point I will try using both Thunderbolt ports with the 2 lcd's again.
     

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