Mini Displayport To HDMI Adapter

Discussion in 'Mac Basics and Help' started by kjs862, Feb 21, 2011.

  1. kjs862 macrumors 65816

    kjs862

    Joined:
    Jan 21, 2004
    #1
    Hello guys, I just purchased a Mini Display Port to HDMI adapter from my local computer store so I could connect my MacBook Pro to my friend's Sony 1080p 240Hz TV. Everything is working fine, but when I open my display preferences when the TV is connected it is only giving me the option of 1080p resolution at 60Hz. Does Mini Displayport not support higher refresh rates than 60Hz?

    Thanks
     
  2. robbieduncan Moderator emeritus

    robbieduncan

    Joined:
    Jul 24, 2002
    Location:
    London
    #2
    Does your TV support faster refresh than that?
     
  3. kjs862 thread starter macrumors 65816

    kjs862

    Joined:
    Jan 21, 2004
  4. robbieduncan Moderator emeritus

    robbieduncan

    Joined:
    Jul 24, 2002
    Location:
    London
    #4
    The TV has a 240Hz panel refresh. That does not imply it supports >60Hz inputs. Read this. See all the stuff about the TVs inserting extra frames to up the rate from 60Hz. My guess is that the TV only supports up to 60Hz input and only advertises that speed via DDC.
     
  5. kjs862 thread starter macrumors 65816

    kjs862

    Joined:
    Jan 21, 2004
    #5
    Sorry to bother you again, but do you know if any TV's support >60Hz inputs, or are they all marketing scams?
     
  6. Anonymous Freak macrumors 601

    Anonymous Freak

    Joined:
    Dec 12, 2002
    Location:
    Cascadia
    #6
    It's not so much a marketing scam as just exaggeration. The big point of 120 Hz is that it is evenly divisible to both 60 Hz and 24 Hz, which means you can display both of those rates with no alteration.

    240 Hz just takes it another multiplier, to cover 3D (which doubles rates.)

    But, generally, these TVs can only input 60 Hz max. I haven't heard of a single 3D format that uses more than 30 Hz per eye, most motion picture (Blu-ray) sources are 24 Hz per eye, so 240 Hz is plenty. I also find that the tricks they use to up-sample the rate make the movies look "wrong". Motion pictures are supposed to be 24 fps, so the interpolation to make them 120 Hz just makes them look strange.
     

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