Can 2013 iMac's handle 4K displays?

Discussion in 'iMac' started by MartinAppleGuy, Jul 16, 2014.

  1. MartinAppleGuy macrumors 68020

    MartinAppleGuy

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    Sep 27, 2013
    #1
    2013 iMac's have more powerful GPU's that rMBP's and rMBP's can handle 4K displays. Can these iMac's still handle 4K displays through Thunderbolt 1?
     
  2. fa8362 macrumors 65816

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    Jul 7, 2008
  3. yjchua95 macrumors 604

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    Apr 23, 2011
    Location:
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    #3
    TB1 itself doesn't have the bandwidth to support 4K@60Hz.
     
  4. MartinAppleGuy thread starter macrumors 68020

    MartinAppleGuy

    Joined:
    Sep 27, 2013
    #4
    Is there any other way to do it then?
     
  5. rambo47 macrumors 6502a

    rambo47

    Joined:
    Oct 3, 2010
    Location:
    Denville, NJ
    #5
    At present: no. The MacPro, however, can handle multiple 4K monitors with aplomb. :)
     
  6. yjchua95 macrumors 604

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    #6
    Nope. Unless you're happy with 30Hz.
     
  7. brdeveloper macrumors 68020

    brdeveloper

    Joined:
    Apr 21, 2010
    Location:
    Brasil
    #7
    The problem is the lack of compression standards. Streaming uncompressed 4K content is insane, but if there was a system capable of delivering frames at 70% of their original (uncompressed) size, TB1 would be capable of handling 4K@60Hz. Compression should be made in real time, but it shouldn't be a problem for recent iMacs with discrete graphics or with an Iris Pro. OpenCL would perform the task blazing fast.

    On the display side, the compression algorithm should be known, though. Hopefully the next gen Apple Display will allow 4K@60Hz on TB1-capable devices. Then it will be a matter of time do see the method supported by major brands.
     

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