How to connect 3 monitors?

I have 2 XFX HD6870 cards in crossfire in my system but when I try to connect three monitors only two if them work. I am using the DVI ports, two on one card and one on the second. I can run two no problem and can swap the third with one of the two and the monitor itself works fine so I know the monitor itself is working just cant run 3 from the dvi. Is there a solution for this problem?
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  1. Hello biggmann,
    There is a solution to your problem.
    To run more than 2 monitors in eyefinity you need either a native displayport monitor or active displayport adapter. In your case you will be using DVI ports to you will need an active displayport adapter.
    Here is one - http://www.newegg.com/Product/Product.aspx?Item=N82E16814999030
    Get the adapter.
    Then hook up your monitors, 1 via dvi, 1 via dvi, 1 via active displayport to dvi.(By the way hook all of them up to the same video card.

    Also if your video card has mini-displayports instead of displayport, choose this adapter
    http://www.newegg.com/Product/Product.aspx?Item=N82E16814999034
  2. To run Eyefinity, you need an Active Displayport Adapter, which is connected to either the DP or Mini DP Port.

    The other monitors are shared between DVI/HDMI depending on card outputs.
  3. I got the mini dvi to dvi adapter but I still cant get the three monitors to work properly. I am wondering if there is a setting somewhere I can change or something I need to do in order to get these things working.
  4. Here is a list of validated displayport adapters.

    http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx

    I haven't used Eyefinity for a while now, but you had to have an ACTIVE (ie USB powered) adapter:

    http://www.accellcables.com/products/DisplayPort/DP/mdp_dvid.htm
  5. mini DISPLAYPORT not mini dvi, u gotta connect ure monitors to the two dvi and the DISPLAYPORT on the SAME card
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