i7 27" using as external monitor

Discussion in 'iMac' started by wangkom, Aug 16, 2010.

  1. wangkom macrumors member

    Oct 24, 2007
    Ok, I bought the mini-display port to dual link dvi adaptor for $99. However, it doesn't work from going from my pc to the imac or from my macbook pro to the imac.

    I find it retarded that they wouldn't even sell a working adapter.

    Has anyone gotten this to work or does anyone know which adapter I can buy to get this going?

    -PC to iMac
    -2009 (pre-minidisplay port) dvi to imac.

    I need it to be dual link dvi because I want to use it at max resolution.

    Thanks in advance.
  2. xraydoc macrumors demi-god


    Oct 9, 2005
    You bought the wrong adapter. These adapters go only one-way.
    What you bought goes from mini-DisplayPort to dual-link DVI.

    Confusion can be prevented by reading about what it is you're buying before you buy it. Retartedness has nothing to do with it.

    You need DVI to DisplayPort (or mini-DisplayPort). Unless your PC has a display port output on it, be prepared to spend some money. Display Port is not electrically compatible with DVI (completely different protocols), so active circuitry is needed to do the conversion.

    Here is one such adapter.
    http://www.gefen.com/kvm/dproduct.jsp?prod_id=8913 (this is a single-link adapter, BTW. I'm not sure if dual-link DVI --> DisplayPort converters are available)
  3. wangkom thread starter macrumors member

    Oct 24, 2007

    Thanks for your reply. I knew buying it that there was not much chance it would work (which was helped by the people at the Apple store having no idea if it was one way or not).

    I didn't mean it was retarded that the adapter worked or not for what I was doing. I find it retarded that Apple has switched from DVI to Displayport and made functionality for their iMacs to be used as an external monitor for laptops, etc.

    They don't sell an adapter for dual link dvi to mini displayport. I can't be the only person that needs it.

    I wrote the original message poorly because I was late for work.

    To summarize, does anyone know of an adapter? Dual link DVI --> Mini displayport

  4. xraydoc macrumors demi-god


    Oct 9, 2005
    Easiest and cheapest way may simply be to replace the video card in your PC if you can. Pop something in with a display port on it and get yourself a display port to mini-display port cable like this one: http://estore.circuitassembly.com/p...isplayport-Adapter-Cable.html?setCurrencyId=2
  5. wangkom thread starter macrumors member

    Oct 24, 2007
    Wouldn't be cheap. It's a gaming rig and has Nvidai GTX 480x2 in SLI.

    That's why i need to continue to use the PC. If I wanted to throw some cheap graphics card with mini-display port, then I'd just use the imac exclusively.
  6. DannyBres macrumors 65816


    Oct 30, 2007
    Im not sure if you are going to be able to get DVI from your PC to display at the native resolution on your iMac.... No matter what adapter you buy!
  7. wangkom thread starter macrumors member

    Oct 24, 2007
  8. foodle macrumors 6502

    May 14, 2008
    Pennsylvania, USA
    Uh, I don't see a link ...

    Atlona, Gefen, and others make DVI to mini DP adapters. I think there are even dual link DVI ones, so you could drive the 27" iMac at the full resolution.

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