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Can't get 3rd monitor to work with Eyefinity - it has DisplayPort!

Discussion in 'Hardware' started by Mr Davo, Jan 19, 2012.

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  1. Mr Davo

    Mr Davo Thread Starter

    Joined:
    Mar 15, 2009
    Messages:
    349
    Hi Everyone,

    I am attempting to configure EyeFinity with 3 monitors. My graphics card, a PowerColor HD 6850 supports a maximum of 3 monitors, and it sports the following monitor outputs: 2 x DVI, 1 x HDMI & 1 x DisplayPort.

    My 3 monitors are all the same brand (Dell) and model (U2212HM UltraSharp), they each sport 1 x DisplayPort, 1 x DVI & 1 x VGA connection.

    As all of my monitors support DisplayPort I see no need for a DisplayPort adaptor, and I have connected my monitors as follows:

    1). DVI
    2). VGA by way of DVI Adaptor (this is because I am using a KVM switch)
    3). DisplayPort

    Ironically only the 3rd, DisplayPort connected monitor is not working with EyeFinity! I have manually set the connection on the monitor (through the monitor's menu) to DisplayPort. Further when I turn the monitor off and on I see the message: "No DisplayPort - so the monitor doesn't "believe" that it is connected.

    Windows (7 - x64 - Professional) on the other hand responds to the monitor being turned on and off by making the long "doo doo" sound that it typically makes whenever a USB connection is established! However this being said "Screen Resolution" item only ever reports that two monitors are connected!

    Furthermore ATI Catalyst can only see two monitors connected - it sees one Analog (due to the adaptor) and one digital (as pictured below).

    [​IMG]

    Any help with getting my 3rd monitor will be greatly appreciated. I have considered uninstally & reinstalling the driver - but I am not convinced that this will help as the monitor is reporting "No DisplayPort Cable"!

    Thanks

    Davo
     
  2. sonexpc

    sonexpc

    Joined:
    Mar 31, 2011
    Messages:
    663
    Try to make DisplayPort as primary Monitor and boot up from there make sure is it work first and then add each monitor on to the system ...
     
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