Mac Pro PC Graphics card question (Project Cars + Windows)

Discussion in 'Mac Pro' started by smuudge, Jan 25, 2017.

  1. smuudge macrumors newbie

    Joined:
    Jun 1, 2007
    #1
    Hello everyone.
    I have recently retired my 8 core Mac Pro from graphics duty and it now is being used in the gaming den to run Project Cars!
    I have Windows 8.1 running smoothly and also 2 Mac cinema displays running off of a flashed AMD Radeon 6800 HD 1GB video card. Project Cars runs smooth but i am looking for a triple display set up to complete the effect!

    My question is, can anyone recommend a good cheap/card that will slot in to the PCI slot on the MP and give me a good frame rate for game play?

    I don't really want to fork out for another 1Gb Mac card if i have too and this will only be used under Windows OS so guess that opens the doors for a cheaper Windows PCI card?

    Thanks in advance.
     
  2. Fl0r!an macrumors 6502a

    Joined:
    Aug 14, 2007
    #2
    Your HD 6870 (or 6850?) should be able to drive three displays just fine. Or is the performance insufficient when attaching a 3rd one?
     
  3. smuudge thread starter macrumors newbie

    Joined:
    Jun 1, 2007
    #3
    Ah that's very strange, i did actually try that but i couldn't get a signal out of the 3rd monitor. I just assumed the card was only capable of displaying 2 signals at a time.

    It appears i need to be more specific with the type of connectors i use and in what combination to get the 3 ports/monitors to work according to varying google search results. For instance (mini-dp + hdmi/vga + dvi)

    Can anyone clarify?
     
  4. Fl0r!an macrumors 6502a

    Joined:
    Aug 14, 2007
    #4
    AMD cards can only drive two legacy displays (DVI / HDMI / passive DP), each additional display needs to be connected through a true DisplayPort connection (=> native DP device or active DP adapter).
     
  5. smuudge thread starter macrumors newbie

    Joined:
    Jun 1, 2007
    #5
    Thanks. Is the 'Apple MDP to DVI adaptor' classed as an 'active DP adaptor' or am i looking for something different?
     
  6. Fl0r!an macrumors 6502a

    Joined:
    Aug 14, 2007
    #6
    The Apple adapters are passive (except the super expensive Dual Link DVI one).
     
  7. smuudge thread starter macrumors newbie

    Joined:
    Jun 1, 2007

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