ATI 4870 Crossfire, hypothetical question...

Discussion in 'Mac Pro' started by inigel, Jul 13, 2009.

  1. inigel macrumors regular

    inigel

    Joined:
    Mar 14, 2008
    Location:
    Australia
    #1
    I'm am sick of being on the **** end of Apple's pricing stick (I live in Australia) and have decided to buy a PC 4870 and flash the ROM.

    I can get a good deal on two 512MB cards, and I thought that would be awesome for gaming.

    My questions are;

    1- Will the cards work properly in Mac OS X if I crossfire them?
    2- Do both cards have to be flashed to Mac versions?
    3- Is this possible at all?
     
  2. Cindori macrumors 68040

    Cindori

    Joined:
    Jan 17, 2008
    Location:
    Sweden
    #2
    There are no crossfire drivers in OSX. Crossfire does not work.

    In Windows, crossfire works.


    They have to be flashed to be used in OSX.

    Also, if you don't get the right model, only 1 DVI will work on the card.


    Just do like me and get the 4890 :)
     
  3. inigel thread starter macrumors regular

    inigel

    Joined:
    Mar 14, 2008
    Location:
    Australia
    #3
    OK, but will the card work? Or does having the card crossfired change everything?
     
  4. Cindori macrumors 68040

    Cindori

    Joined:
    Jan 17, 2008
    Location:
    Sweden
  5. Andrew Henry macrumors 6502a

    Joined:
    Mar 4, 2008
    #5
    No it wont, if anything it will show as 2 separate cards.
     
  6. Tallest Skil macrumors P6

    Tallest Skil

    Joined:
    Aug 13, 2006
    Location:
    1 Geostationary Tower Plaza
    #6
    Do not flash them. Install netkas' injector to run PC cards natively.

    OS X does not support CrossFire in any way, shape, or form. Two cards will show up as two cards. The second card will be useless unless you have a monitor plugged into it.
     
  7. lannister80 macrumors 6502

    lannister80

    Joined:
    Apr 7, 2009
    Location:
    Chicagoland
    #7
    If you like leaving 2 video cards in your box just to get it to boot.

    Extra heat = bad
     
  8. inigel thread starter macrumors regular

    inigel

    Joined:
    Mar 14, 2008
    Location:
    Australia
    #8
    Thanks for the responses. It seems like too much effort.

    I'll just build a dedicated box for gaming.
     
  9. noiceT macrumors 6502a

    Joined:
    Jul 7, 2008
    Location:
    Catalina Wine Mixer
    #9
    Yeah, injectors are great, and a real step forward imo.
    However, the problem though I have is while running 2 vid cards does equal more heat and use more power, the thing that worries me the most is the fact that I'm going to be relying on a 7300gt.

    With the fact of them failing at a high rate, using the 7300gt as the EFI boot for a PC card puts the PC card at the mercy of the 7300; once it goes...no more osx for you... and now you just have a card that works in windows.
     
  10. Cindori macrumors 68040

    Cindori

    Joined:
    Jan 17, 2008
    Location:
    Sweden
    #10
    For the 285, yes. For the 4890, no need :)
     

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