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  1. #1


    Member Since
    Aug 15, 2010
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    Mac Pro with 2 ati 5870 - HELP
    I'm looking to buy a new Mac Pro in the next couple of weeks. Specs are close to basic (3.2 nehalem, 6 gigs of ram and an ati 5870). Eventually I would like to upgrade it... meaning get a westmere 6 core (bye bye applecare), ssd and hopefully a second 5870. My question to the more mac savy ppl is: would it be possible to install and operate an additional 5870 in crossfire?
    I've been reading some forums saying I have to install a PSU to run the second video card since the Mac Pro won't take more than 300 watts (for the PCI slots) and some wire mambojumbo that i have yet to get any specific info about. From the looks of it, I don't think it would be hard to install the PSU in the empty optics bay but would this kill my applecare thing and would the 2 cards work from a hardware/software point of view (in OSX and Win 7)?

    Thank you.

  2. #2


    Member Since
    Aug 15, 2010
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    anyone?

  3. #3

    iggibar's Avatar
    Member Since
    Apr 20, 2009
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    4.1 Mac Pro. 15" MBP. 13" MBP. 17" PB. PM G5. iPhone 6S+ 64gb Gold. Apple Watch 42mm.
    If any damages/problems are caused by you running something that is not intended to be run, you warranty/apple care will be void.
    “If you are distressed by anything external, the pain is not due to the thing itself but to your own estimate of it; and this you have the power to revoke at any moment.” Marcus Aurelius

  4. #4

    harryb2448's Avatar
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    Nov 28, 2007
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    Imac 27", 3.3GHz, 512 flash storage, 16GB memory, macOS Sierra.
    You anticipate we will tell you how to turn your Mac Pro into a hackintosh?

  5. #5


    Member Since
    Oct 05, 2009
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    236
    Specs:
    2011 13' Macbook Pro i5
    Quote Originally Posted by Semaka View Post
    I'm looking to buy a new Mac Pro in the next couple of weeks. Specs are close to basic (3.2 nehalem, 6 gigs of ram and an ati 5870). Eventually I would like to upgrade it... meaning get a westmere 6 core (bye bye applecare), ssd and hopefully a second 5870. My question to the more mac savy ppl is: would it be possible to install and operate an additional 5870 in crossfire?
    I've been reading some forums saying I have to install a PSU to run the second video card since the Mac Pro won't take more than 300 watts (for the PCI slots) and some wire mambojumbo that i have yet to get any specific info about. From the looks of it, I don't think it would be hard to install the PSU in the empty optics bay but would this kill my applecare thing and would the 2 cards work from a hardware/software point of view (in OSX and Win 7)?

    Thank you.
    If you want that kind of power,skip the mac pro,get a Dell XPS 9100,I know dell was always more pricy,no more. For the base price of a mac pro,you can grab an i7 920,an ATi 5970 and 12GB of ram with dedicated sound and 1.5Tb drives.

  6. #6

    CrimsonRequiem's Avatar
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    MBP 2.3 Ghz 4GB RAM 860 GB SSD, iMac 3.4 GHz Intel Core i7 32GB RAM, Fusion Drive 1TB
    Is it even possible to do a crossfire on a Mac? I know you can do an SLI config.

    Quote Originally Posted by harryb2448 View Post
    You anticipate we will tell you how to turn your Mac Pro into a hackintosh?
    More like a modded Mac Pro. I would say.
    死神はリンゴしか食べない。

  7. #7

    pigoo3's Avatar
    Member Since
    May 20, 2008
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    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by Semaka View Post
    My question to the more mac savy ppl is: would it be possible to install and operate an additional 5870 in crossfire?
    I've been reading some forums saying I have to install a PSU to run the second video card since the Mac Pro won't take more than 300 watts (for the PCI slots) and some wire mambojumbo that i have yet to get any specific info about.
    I'm not exactly sure what your goals are...but with most Mac Pro's, you can install 4 video cards. If each video card has 2 DVI ports...you can connect up to 8 monitors. Obviously if the video cards take up two PCIe slots...you won't be able to install 4 cards.

    So with this being said...if your main goal is to run a lot of monitors from this Mac Pro...just install more video cards. If you want to run two 5870's in Crossfire...not sure you can do it.

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  8. #8


    Member Since
    Oct 05, 2009
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    Specs:
    2011 13' Macbook Pro i5
    You might be able to replace the 5870 with an 5970,which integrates the twin 5870s into one card,might save you a buck too.

  9. #9

    rippingviper's Avatar
    Member Since
    May 20, 2009
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    Selkirk, Manitoba
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    MacBook Air 13" , 21.5" iMac i5, White iPhone 4s 32gig, iPad 3 white 16 gig, i5 Mac Mini
    That depends doesnt it. I thought the video card has to be mac specific you can't just slam any old card in there.
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  10. #10


    Member Since
    Aug 20, 2010
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    Terms youllers
    Anyone have luck flashing the 5970 and powering it in their Mac pro? I want to do this in my 2009 tower and I've heard few had some luck but I haven't seen a definitive guide around.

  11. #11


    Member Since
    Nov 30, 2010
    Posts
    2
    Specs:
    2010 Mac Pro 3.2 Nehalem 5870, iPad 3g 64gb
    There's a guy on macrumors who is just waiting on the crossfire bridge to try the 5870 crossfire under windows, another guy cut a piece out of his case to fit the wiring. Sounds worse then it really is. He has picks

  12. #12


    Member Since
    Oct 25, 2010
    Posts
    14
    Quote Originally Posted by harryb2448 View Post
    You anticipate we will tell you how to turn your Mac Pro into a hackintosh?
    What about this sounds like a Hackintosh? He wants to buy a MacPro and put an additional graphics card in it. You can't really make a Hackintosh out of a machine that's already a MACintosh.

    Maybe he wants to use the dual cards in Windows via bootcamp for gaming, but again, that isn't a Hackintosh.

  13. #13


    Member Since
    Nov 30, 2010
    Posts
    2
    Specs:
    2010 Mac Pro 3.2 Nehalem 5870, iPad 3g 64gb
    Also i talked to an senior advisor in applecare and he said just to remove the PSU and 2nd 5870 in case u need to ship your mac for warranty repairs.So the 5870 crossfire set up will NOT void your applecare.

  14. #14

    Slydude's Avatar
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    Nov 15, 2009
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    North Louisiana, USA
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    Specs:
    2.8 GHz MacBook Pro 10.11, 8 GB mem, iPhone 6+
    Assuming that you could get crossfire working is it going to give you that big a performance boost? I haven't really researched it on the Mac side since I don't need it for what I do but I know that my wife did not notice a difference with many of the games she uses regularly on her Vista box.
    "Got Time to breathe. You got time for music." Denver Pyle as Briscoe Darling

  15. #15


    Member Since
    Jan 24, 2011
    Posts
    2
    Sounds awesome Good luck
    Good choice on getting an SSD as well - if you need any help choosing the best model to buy, let me know and I'll be happy to help out.

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