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  1. #1
    ATI Radeon HD 4870 with Mac Pro

    Member Since
    May 19, 2010
    Posts
    1
    ATI Radeon HD 4870 with Mac Pro
    Hey all,

    I have been trying to install 2 new Radeon 4870 graphics cards in my mac pro and I'm running into some issues. Powering each card requires 2 'connectors' that fit into the logic board. In order to use 2 cards however (each with 2 connectors) I would need 4 inputs on the logic board - I am only seeing 2 total?

    Do I need to purchase some kind of adapter to power both these cards? Is there something I am totally missing?

    Any advice would be greatly appreciated

  2. #2
    ATI Radeon HD 4870 with Mac Pro

    Member Since
    Aug 20, 2010
    Posts
    2
    Quote Originally Posted by samham View Post
    Hey all,

    I have been trying to install 2 new Radeon 4870 graphics cards in my mac pro and I'm running into some issues. Powering each card requires 2 'connectors' that fit into the logic board. In order to use 2 cards however (each with 2 connectors) I would need 4 inputs on the logic board - I am only seeing 2 total?

    Do I need to purchase some kind of adapter to power both these cards? Is there something I am totally missing?

    Any advice would be greatly appreciated
    The cards would need to be flashed to work under osx unless they are the new Mac version. I've heard people use an adaptor and the power supply from the cd bay to power the second card, there are some instructions if you google around. Let me know how it works because I've been wanting to get two of those or one 4970 in my early 2009 Mac pro.

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