Will current iMac (2012) drive 4K displays?

Discussion in 'iMac' started by wmy5, Jun 18, 2013.

  1. wmy5 macrumors regular

    Joined:
    Oct 27, 2012
    Location:
    upstate NY
    #1
    Hi guys, if Apple release new TB displays, 4K or higher (27" retina, 5120x2880) resolution, will current iMac, with 680MX graphics, support it?

    Thanks a lot.
     
  2. forty2j macrumors 68030

    forty2j

    Joined:
    Jul 11, 2008
    Location:
    NJ
    #2
    Depends on what you try to do on it... it should be fine for playing a 4K video, but don't expect too much in terms of real-time 3D rendering.
     
  3. Bear macrumors G3

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    Jul 23, 2002
    Location:
    Sol III - Terra
    #3
    I do not believe the current (and previous iMacs with Thunderbolt) will support a 4K display. I think that is one of the features of Thunderbolt 2.

    You answered a hardware question with a software answer.
     
  4. forty2j macrumors 68030

    forty2j

    Joined:
    Jul 11, 2008
    Location:
    NJ
    #4
    TB(1) has the bandwidth to drive a 4K display. (It can't, though, drive 3 of them at the same time, like TB2 can).

    "Support" means different things to different people. If I say "Yes, it supports it", but what that means is, "Yes, you can make the connection and get a picture, but all you can really see is your wallpaper and a slowly painting application", many people would say "then why did you say it supports it?"
     
  5. Apple fanboy macrumors Core

    Apple fanboy

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    Feb 21, 2012
    Location:
    Behind the Lens, UK
    #5
    If you can currently drive 2 Thundebolt 27" screens wouldn't one 4K screen be less pixels? In my head that makes it possible. Not sure about running 2 though!
     
  6. Shane1905 macrumors regular

    Joined:
    May 21, 2012
    Location:
    UK
    #6
    One 4k display would carry 2.25 times the pixels of the current Thunderbolt Display, 3,686,400 pixels vs 8,294,400. It could definitely power it's own 4k display if apple were so inclined :rolleyes:
     
  7. mrmarts macrumors 65816

    Joined:
    Feb 6, 2009
    Location:
    Melbourne Australia
    #7
    To run a thunderbolt 4k display, you will need the newly revised thunderbolt 2 port only found on the Mac pro atm. in terms of software i'am not sure whether Mountain Lion supports 4k resolution.

    Your safest bet is to it give a couple of years when the technology will become adopted more rapidly and the prices drop, also there is no content in 4k unless you want to watch home brew movies. If you desperately want a 4k wait for the macbook retina to get thunderbolt 2 ports and than get yourself the rumoured 4k thunderbolt monitor.
     
  8. Moonjumper macrumors 68000

    Joined:
    Jun 20, 2009
    Location:
    Lincoln, UK
    #8
    iMac tech specs say it will drive an external monitor up to 2560x1600.

    4K needs Thunderbolt 2 or HDMI 1.4, neither of which are on the current Mac.

    4K also needs GPU support, which the HD4000 spec does, but the drivers do not, probably an OS limit (but OS X must be changing with Mavericks to support the new Mac Pro and possibly others).
     
  9. rei101 macrumors 6502a

    Joined:
    Dec 24, 2011
    #9
    Why someone would need 4K? Ok, it looks good, but do not be a technology junky. Spending more in things you do not need or will ever use.

    I work on TV, HD is ok but then you compress the signal big time and just one other network has the capacity to fully show HD. 4K... for get about it.
     
  10. mellofello macrumors 65816

    Joined:
    Feb 1, 2011
    #10
    I personally can't wait for 4k support. I'm anticipating ditching my 2012 imac, for a 32 inch 4k panel, and mac mini, next year sometime.:D
     
  11. Muscle macrumors regular

    Joined:
    Oct 15, 2010
    #11
    Although the late 2012 iMac does not support a 4k display, will I be able to use a 4k display at a different resolution when connected via thunderbolt?
     
  12. yjchua95 macrumors 604

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    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #12
    Yes, you can use it at 2560x1440.

    With some hacks, you can drive a 4K display but only at 30 Hz.
     
  13. Muscle, Jun 23, 2015
    Last edited: Jun 23, 2015

    Muscle macrumors regular

    Joined:
    Oct 15, 2010
    #13
    Ok Thanks. Don't know why I asked about a 4k display when I'm looking to connect a Dell U2715H monitor to my late 2012 iMac.

    [edit] Also, since the U2715H monitor only comes with a mini display / display port cable. Does anyone know if I can use this cable to connect to my iMac's thunderbolt port for the monitor?
     
  14. yjchua95 macrumors 604

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    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #14
    Yes you can.
     
  15. michaelsammler macrumors newbie

    michaelsammler

    Joined:
    Nov 15, 2015
    #15
    Can someone explain a bit more to me?

    I am looking at the Cintiq 27QHD with 1440p, which sounds like it should be fine using ether HDMI or display port from a 27inch late 2012 iMac with the MX680 Nividia card through the TB port using an adapter.
    But maybe not the HDMI? Nividia says the MX680 has HDMI 1.4, but above in this thread, it says the late 2012 imacs do not support HDMI 1.4.

    I have been saving up all year, and christmas is almost here :)
     

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