Mac Pro (2009) - NO SOUND with Radeon HD 5870 installed

Discussion in 'Mac Pro' started by Hadouken!, Dec 8, 2011.

  1. Hadouken! macrumors newbie

    Dec 7, 2011
    Hi folks - really need some help here. I'm currently running a;

    Mac Pro 4,1 (early 2009)
    2.66 Ghz Quad-Core Intel Xeon
    8 Gb RAM
    Boot ROM MP41.0081.B07
    Mac OS X 10.7.2

    I've just swapped out my stock GT 120 card for a new Radeon HD 5870, I have it connected to my Sony SDM-X93 monitor via DVI. On booting up, I now have NO SOUND on my Mac at all and the sound control panel states 'no output devices found'. I've also tried booting up in both Snow Leopard and Windows 7 x64 (bootcamp) but with the same results - no sound at all. All the sound controls appear 'muted'.

    I have read a note on Apple's site regarding a no sound issue on the MP 2009 when used with the mini display connectors but I am and will only be using the DVI port.

    Does anyone have any suggestions please? is the card faulty? I'm unsure as to why installing a graphics card creates issues with audio

    If I can't get it working it will just have to go back and I'll have to live with the GT 120

    cheers all!
  2. Hadouken! thread starter macrumors newbie

    Dec 7, 2011
    Issue fixed

    FIXED: Do a PRAM reset (reboot and press "apple+p+r" so that you hear the boot chime two times than release the keys)

    Thanks to Caesar 091 for the tip!
  3. johniet macrumors newbie

    Jan 3, 2012
    No sound MacBook Pro

    Im a bit disappointed right now, i used to use my wireless Bose speakers normally and when i wanted i used the internal speakers, but now sound only works with the WIRELESS speakers, and the internal ones don't show up in the list of sound preferences, i have restarted the PRAM several times with alt+cmd+P+R, there is no red light because its WIRELESS, i hate to register in forums but i am really desperate and i feel stolen...$1200 for this???
  4. ActionableMango macrumors G3


    Sep 21, 2010
    This is the Mac Pro forum (desktop). For your laptop you might get better help in the MacBook Pro forum.

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