11 Replies Latest reply: Dec 5, 2012 12:47 PM by JohnBeast929
Slipping Away Level 1 Level 1

Hi there

I have a Mac Pro 2.93 Ghz Quad-Core Intel Xeon - (4GB-1066 Mhz -DDR3)

Serial Number:

I wish to run 2 - 30" Cinema Displays from my machine - which Graphics Card do I need to order to do  the job successfully?

Many thanks


<Serial Number Edited by Host>

Mac Pro, Mac OS X (10.5.8)
  • The hatter Level 9 Level 9

    yours came with GT120. Doesn't do the job?


    Nothing I can suggest until you are running 10.6.8 or Lion and then ATI 5770 with dual link DVI


    Graphics Cards Apple Store


    Display Adapters Needed

  • Slipping Away Level 1 Level 1

    Not sure what my machine came with - it runs 1 3)" Display A-OK - but only one DVI outlet


    So I guess I need a new card with two DVI outlets - just wondering which one is compatible

    (I'm not great at these technical issues)


    Many thanks


  • The hatter Level 9 Level 9

    Show us the top of what you find in System Profile, include the graphic adapter.


    Even a GT120 which was stock should have two DVI.


    And the 5770, re read and study that article. It has one DVI and the 2nd display would need a special adapter for the DisplayPort to 30 inch (dual link).


    It is when people get into 3 displays it gets more interesting.

  • Grant Bennet-Alder Level 9 Level 9

    None of the newer cards come with two DVI outlets. The second (and third) are Mini DisplayPort. To run a second DVI for a screen wider than 1920, such as your 30" cinema displays, you need a Mini DisplayPort to Dual-Link DVI adapter, about $100 from Apple, slightly cheaper third-party.


    Dual-Link refers to the number of bits in the display data path -- it does not refer to dual displays.

  • Slipping Away Level 1 Level 1

    Hi there


    It is the

    NVIDIA GeForce GT 120


    But only one slot - for one 30" Display

  • Grant Bennet-Alder Level 9 Level 9

    The second slot on a GT120 is the tiny Mini DisplayPort. you can adapt it to Dual Link DVI with a US$100 Dual-Link DVI adapter.

  • The hatter Level 9 Level 9

    Apple product page: only instead of leaving it "in place" for reference, you get 'bad url'

    NVIDIA GeForce GT 120


    So went to Nvidia product page.

    GeForce GT 120 OEM

  • Slipping Away Level 1 Level 1

    Could I buy & install a second NVIDIA GeForce GT 120 Graphics Card- on ebay for peanuts & plug my 2nd 30" Cinema Display into that 2nd card/DVI slot


    Would the system recognise the second monitor in this scenario?


    I only ask as it looks like a choice between a 2nd Graphics Card versus a Mini Port adapter solution - would either route get me to the promised land?


    Many thanks for all your help thus far!

  • Grant Bennet-Alder Level 9 Level 9

    All you need to get the second display to light up is the adapter. Apple supports multiple displays on same card or additional cards, no big deal.


    Apple sold an optional Mac configuration that loaded up a Mac Pro with four of those GT120 cards, for eight display support.


    Any card you buy must have Apple firmware, or you get no picture under Mac OS X.


    If you are going to buy another card, you may want to consider a 5770 or 5870 if you are doing graphics-intensive work.

  • The hatter Level 9 Level 9

    this is well known and can also be found on forums.macrumors



    2nd gt120 was popular before they disappearedfrom the store

  • JohnBeast929 Level 1 Level 1

    I have a 2010 powermac g5. I have a 30" cinema display. I also have a 42" sony flat screen from 2005-2006 that I have been using as my second monitor. I have the monitor connected via Mini DisplayPort to DVI using a apple adaptor. RecentlyI have been experiencing problems on my flat screen TV. There seems to be a doubling effect along with TV snow on the screen. I tried changing resolutions and nothing happened as well as buying a new adapter. 


    I know currently I have a Nividia GeForce GT 120 graphics card. Do I need to update the drivers or ge a better graphocs card. By me running dual screens, ( a 30" display and a large flat screen ) is it pushing the card too hard of sorts?  Please help !!! 


    Thank you for any suggestions!