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ATI Radeon HD 5770 with 3 displays?

7064 Views 38 Replies Latest reply: Dec 12, 2013 2:26 PM by ludy13 RSS
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Kelly Crossley Level 3 Level 3 (710 points)
Currently Being Moderated
Oct 18, 2012 10:09 AM

Is it possible to setup my Mac Pro the ATI Radeon HD 5770 with the following displays?

 

Mini DisplayPort --> StarTech MDP2DVI Mini DisplayPort to DVI Adapter --> LG IPS235 Monitor

Mini DisplayPort --> StarTech MDP2DVI Mini DisplayPort to DVI Adapter --> LG IPS235 Monitor

Dual-Link DVI --> IOGEAR DVI to HDMI Adapter --> 15' HDMI Cable --> Samsung 32" LED 1080p TV

 

This setup will be used in a design studio. I know the first two will work because I'm already using that setup, but I wasn't sure if I could add the Samsung 32" LED TV as well. The two LG IPS235 monitors are for my desktop use. The Samsung 32" LED TV will be used to show clients print and website design proofs and will likely be set to mirror one of my desktop monitors.

 

Any help or advice is greatly appreciated.

  • The hatter Level 9 Level 9 (58,580 points)
    Currently Being Moderated
    Oct 18, 2012 10:16 AM (in response to Kelly Crossley)

    Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)

    http://support.apple.com/kb/HT3382

    Guide to Apple graphic display adapters needed

    https://support.apple.com/kb/HT3235

     

    Atlona (Dual Link) DVI to Mini DisplayPort Converter for Apple 27-inch LED and 27-inch iMac

    http://www.atlona.com/Atlona-Dual-Link-DVI-to-Mini-DisplayPort-Converter-USB-Pow ered.html


    Mac Pro (Early 2009), Mac Pro (Mid 2010), Mac Pro (Mid 2012): Issues with three displays and multiple DVI, HDMI connections

    It's not the USB data that is needed to run three displays. It's the extra POWER. If you read the Apple article, they say the only solution they endorse is their US$100 Dual-Link adapters. Check the table at the end of the article.

    Mac Pro (Early 2009), Mac Pro (Mid 2010): Supported display configurations

    Readers here have found that if you have two Brand-X Powered adapters, aka active adapters, it also works fine. These do not always require another USB. If designed recently, they can pick up a power pin in the Mini DisplayPort interface.

    AMD (makers of the 5770 and 5870) lists the qualified POWERED adapters that meet their most stringent requirements. Look down the page and you will find several qualified Active Mini DisplyPort to various others, such as HDMI. These adapters are available from other outlets, such as Amazon, sometimes for far less than the Apple adapters.

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

    The other desktop monitor will plug directly into the DVI port on the card and the 40 inch tv will still connect via HDMI over the second Mini Display port.

    That will work only if you use an active Mini DisplayPort to HDMI adapter.

    The only (someone) have found to work (2009)

    http://www.alibaba.com/product-gs/337561577/miniactive_display_port_tohdmi.html

    but you should confirm that they are really active before buying 500 of them.

    You can connect a DVI to HDMI adapter or cable to an active Mini DisplayPort to DVI adapter but that won't give you any audio over HDMI. You could connect the DVI displays to the Mini DisplayPorts with active adapters and use a DVI to HDMI cable or adapter from the DVI port to the TV.

    If you want audio via HDMI, you can use audio from the Mac Pro's optical output with this DVI to HDMI converter:

    http://www.apogeeinc.net/products/item.aspx?item=2745

  • The hatter Level 9 Level 9 (58,580 points)
    Currently Being Moderated
    Oct 18, 2012 10:40 AM (in response to Kelly Crossley)

    Gets asked so often I don't have time to redo every time.

     

    Sorry about the bad link.

     

    Yes the APPLE articles and how to properly handle 27" and larger as well as HDMI, that is in there.

     

    You need active dual-link for anything above 23-24"

  • Grant Bennet-Alder Level 8 Level 8 (48,110 points)
    Currently Being Moderated
    Oct 18, 2012 2:50 PM (in response to Kelly Crossley)

    The scarce resource is the Power needed to run the Active components in all kinds of adapters.

     

    DVI can be directly converted to HDMI with an adapter that only contains wires, no active components needed. So you should run your TV set with such an adapter off the DVI port.

     

    To run more than two displays, any other adapter must be ACTIVE adapters.

     

    Display size is not exactly the determiner of whether Dual Link DVI is required -- wider than 1920 pixels wide is the determiner.

     

    Adapters that are active will make that feature obvious in their advertising.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Grant Bennet-Alder Level 8 Level 8 (48,110 points)
    Currently Being Moderated
    Oct 18, 2012 7:19 PM (in response to Kelly Crossley)

    That setup looks like it should work. Those Startech adapters are listed as active and Gold certified:

     

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

     

    Check out the several paragraphs at the top of that page as well for more insight on active adapters.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Grant Bennet-Alder Level 8 Level 8 (48,110 points)
    Currently Being Moderated
    Nov 25, 2012 9:15 AM (in response to Kelly Crossley)

    Reduce complexity by attaching fewer than three displays at once to debug.

     

    Turn OFF [√] Mirror displays so that resolutions can be set independently on each display.

     

    Use HDMI #1 on the TV, or the one designated for computer connection.

     

    Make sure all connectors are fully seated. Mini DisplayPort must be seated so that essentially ALL of the metal cable-end is inside the jack.

     

    Use "Detect Displays" button to get your Mac to check again for what is connected. Use About this Mac > ( More Info ) > Graphics & Displays to determine whether the name of the Display is shown (which is required for automatic configuration).

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Grant Bennet-Alder Level 8 Level 8 (48,110 points)
    Currently Being Moderated
    Dec 18, 2012 9:06 AM (in response to Kelly Crossley)

    The Apple Mini DisplayPort to Dual-Link DVI cable (US$100) works slightly differently. It picks up even more power from a USB lead.

     

    Since you are running particularly long cables, using at least one Apple adapter may be unavoidable.

     

    DVI to HDMI is a simple -re-wire -- there are no ACTIVE components. So I would not expect an ACTIVE adapter to be available.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
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