does this card drive 3 monitors simultaneously?

the 5770 has three display output ports.
but can it drive all three simultaneously?

can I have a three-display-desktop using this card alone?


  • Asked by Kenneth C from Carlisle
  • Sep 21, 2010
ATI Radeon HD 5770 Graphics Upgrade Kit for Mac Pro (Mid 2010)

ATI Radeon HD 5770 Graphics Upgrade Kit for Mac Pro (Mid 2010)

Product No Longer Available

4 Answers from the Community

  • Best Answer:

    Both of the previous responders are incorrect. This card DOES drive three displays simultaneously, and it does not matter if they are all Mini DisplayPort, all DVI, all VGA, or some combination therein. The important clarification is that if you are connecting three at once, the standard Mini DisplayPort to DVI adapter does not work; you must use the Dual-Link DVI adapter for the second and third DVI displays (regardless of resolution). View Apple support kbase article HT4279 (linking not allowed here) for more details.

    • Answered by Jeffrey B from Hoboken
    • Oct 14, 2010
  • Apple's answer to this question is found in a technical support article.

    Article: TS3477

    They say it requires an "active", powered by USB port, type of adapter to use this card to drive two DVI monitors using one mini-display port adapter.
    It seems to suggest the third DVI monitor can then be driven directly with the DVI port of the card.

    Note there are mixed comments about Apple's "active" mini display port to DVI adapter, particularly when using it to drive a 30 inch HD monitor. There are active "display port" (without the mini) to DVI adapters available that may be used with a mini-display-port to display-port adapter.

    I have just ordered this card so I have not tried driving three monitors.
    I intend to use it to drive two 24 inch monitors directly without any active or powered adapter.
    My older card, an ATI 1600xt, I intend to use to drive a third 19 inch monitor.
    The ATI 1600xt is a single slot card which will work fine with the ATI 5770 dual slot card in my Mac pro 3,1. The standard GT120 in the newer mac pro's could be used to do the same. Note that new mac pros also have two double wide pci slots to accomodate two ATI 5770 dual wide cards if desired.

    Heed the warning of others that this card requires Mac OSX 10.6.5 or better so the drivers are present to support the card. Otherwise, it probably will not operate properly.

    Good luck.

    • Answered by Bill A from Mission Viejo
    • Jan 3, 2011
  • It does not support three displays simultaneously except in one case: two of the displays that have built-in mini-Display ports such as Apple Cinema Display 24/27, i.e. it won't work with monitors with DVI interface through DVI-MDP adaptor; the third one on DVI.

    • Answered by Wei L
    • Oct 4, 2010
  • The answer is yes, depending on the displays. Basically, the card can drive 3 displays with a maximum of two of those displays being VGA/DVI/HDMI displays. To drive 3 displays, at least one of those displays must be a native DisplayPort display OR be driven via an active DisplayPort to DVI-D adapter.

    There is more info on suitable adapters here: support DOT amd DOT com/us/eyefinity/Pages/eyefinity-dongles.aspx

    If you already have a displayport to dual-link DVI adapter, that is also suitable for driving one of the displays.

    • Answered by Philip L from Seattle
    • Sep 24, 2010