Difference between, Mini DisplayPort to Dual-Link DVI Adapter VS Mini DisplayPort?

Discussion in 'MacBook Pro' started by hohohong, Oct 18, 2008.

  1. hohohong macrumors 6502a

    Jun 1, 2007
    Mini DisplayPort to Dual-Link DVI Adapter and Mini DisplayPort to DVI Adapter?

    1 has the USB (for sound?) and power supply whereas the other just an adapter. Mini DisplayPort to Dual-Link DVI Adapter is only good if you have the new Apple LED Cinema Display?

    If I don't have Apple LED Cinema Display, Mini DisplayPort to DVI Adapter should be good enough right?
  2. JG271 macrumors 6502a


    Dec 17, 2007
    You should be fine, higher resolutions are achieved on Dual Link DVI, so that'll only be for very large monitors.
  3. hohohong thread starter macrumors 6502a

    Jun 1, 2007
    So, if I want to hook up to my "future" 42" (not apple) LCD tv, I should go for Dual Link DVI?
  4. valvehead macrumors regular

    Mar 1, 2008
    A TV won't have a resolution higher than 1920x1080. Dual-link is not needed for that. Also, the TV would probably not have DVI since HDMI is the standard. I imagine that there will be Mini-DP to HDMI cables soon, so you might want to wait for that.
  5. hohohong thread starter macrumors 6502a

    Jun 1, 2007
    So for 1080P LCD TV, Mini DisplayPort is enough right?
  6. Chupa Chupa macrumors G5

    Chupa Chupa

    Jul 16, 2002

    The Dual-Link is for the 30" ACD, and probably other 30"+ monitors too. Smaller monitors only need regular DVI.
  7. hohohong thread starter macrumors 6502a

    Jun 1, 2007
    But I'm thinking of hooking up to a 42" 1080p LCD TV,... will the mini displayport works? Or I need a Dual-link?
  8. CoolMacDude macrumors regular

    Jul 9, 2008
    You only need higher dual link for high resolution monitors. The resolution on your 1080p tv is like 1920x1200 whereas the apple 30" cinema display is like 2560x1600(close but not entirely sure on the resolution). For the 1080p dual link DVI isn't needed because the resolution is not as high as the 30" cinema display.

    You will be served fine with a standard DVI with a DVI to HDMI adapter until a mini-dvi to hdmi adapter is available.

    Either way it appears that mini display port although capable of supporting sound likely does not support sound on the macbook and macbook pro. The new cinema display with mini-displayport transfers audio via the USB port (per the apple website). So it appears that even if a mini display port to hdmi adapter is available at some point you might have to transfer the audio another way.

    I can't confirm that its not capable of transfering audio because some are. Its just a guess on my part because they don't use it to transfer audio to the new 24" LED cinema display that utilizes display port.
  9. alphaod macrumors Core


    Feb 9, 2008
    If even plan to get a 30"+ computer monitor with 2560x1600 resolution or higher get the dual-link; otherwise a single-link DVI is all you need.

    Don't forget the dual-link is also $70 more than the single-link, so if you don't need it, don't get it.
  10. eyemacg5 macrumors 6502


    Sep 14, 2006
    Derbyshire, England
    IIRC, the none dual link Mini display to DVI doesn't support overscan.
    I think Overscan is needed for tvs so you will need a dual link dvi adapter.
  11. valvehead macrumors regular

    Mar 1, 2008
    As far as I know overscan only applies to CRT TVs. The image is cutoff on all sides a little so that the resulting image fills the whole screen. The CRT does the cropping. This is only an analog video phenomenon. It has nothing to do with the digital portion of the DVI connection.
  12. michael180 macrumors newbie


    Nov 6, 2007
    Santa Cruz, CA
    Mine works okay, but the it won't display the native resolution 2560x1600 on my 30in Cinema HD.

    Any suggestions?
  13. Snowbound macrumors regular

    May 19, 2008
    Yes, you need the Dual-Link DVI to get that full resolution.
  14. Freyqq macrumors 601

    Dec 13, 2004
    dvi - 1920x1200 (1080p) max
    dual link dvi - 2560x1600 (1600p?) max
  15. NewMacbookPlz macrumors 68040


    Sep 28, 2008
    Works just fine with my Samsung 40" when in extended desktop mode without overscan. Mirror leads to cropping due to the maintaining of the MB's 16:10 ratio.
  16. kasakka macrumors 68000

    Oct 25, 2008
    1080p = 1920x1080.

    If you have a display or TV with 1920x1200 resolution or lower, you need the Mini-DisplayPort -> DVI adapter.

    If you have higher resolution than that (2560x1600 being the only higher native resolution) you need the Mini-DisplayPort -> Dual-Link DVI adapter.

    It's that simple.

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