What is best? 2 ATI Radeon HD 5770 cards? or one HD 5780?

Discussion in 'Mac Pro' started by jaakdedigitale, Mar 25, 2011.

  1. jaakdedigitale macrumors newbie

    Mar 25, 2011

    i want to get max out of my machine, do I buy 2 HD 5770 cards or one HD 5780?

    If I look at the specs I see that the 5780 is "double" the 5770. But if I would place 2 5770's would they work together to become equal to a 5780, but with double the display outputs?

    Or are the double display outputs my only advantage and do they not work together when performing GPU based rendering?

    Any other pros and cons are very welcome. Thanks.
  2. DELTAsnake macrumors 6502


    Jul 18, 2008
    One 5870. Same performance as Crossfire 5770 but no Crossfire bugs.
  3. Vylen macrumors 65816

    Jun 3, 2010
    Sydney, Australia
    Unless you're using more than 3 monitors, you'd best go with the 5870.

    There's no crossfire support in OS X so having 2 5770's will work independently of each other.

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