New NVidia Drivers - Do they Support Audio?

Discussion in 'Mac Pro' started by slughead, Mar 16, 2012.

  1. slughead macrumors 68040

    slughead

    Joined:
    Apr 28, 2004
    #1
    Audio over HDMI/ display port?

    Also: does it do 3 monitors?
     
  2. Cindori, Mar 16, 2012
    Last edited: Mar 30, 2012

    Cindori macrumors 68040

    Cindori

    Joined:
    Jan 17, 2008
    Location:
    Sweden
    #2
    no single nvidia card can handle 3 monitors, not in windows, not in osx.

    EDIT: Except 600 series.
     
  3. slughead thread starter macrumors 68040

    slughead

    Joined:
    Apr 28, 2004
  4. slughead thread starter macrumors 68040

    slughead

    Joined:
    Apr 28, 2004
    #5
    No audio or no 3rd monitor?
     
  5. Cindori macrumors 68040

    Cindori

    Joined:
    Jan 17, 2008
    Location:
    Sweden
    #6
    you already got an answer regarding monitors.
     
  6. bax2003 macrumors 6502a

    bax2003

    Joined:
    Dec 25, 2011
    Location:
    Belgrade, Serbia
    #7
    It is silly that for example Radeon 5870 can output audio only on Mac Pro mid 2010 machines....I just can not believe these things....if graphics card is capable and both system use the same OS, why audio does not work on all models ?

    Little off topic, sorry :)

    http://support.apple.com/kb/HT4241
     
  7. MacVidCards Suspended

    Joined:
    Nov 17, 2008
    Location:
    Hollywood, CA
    #8
    There are ways to enable Audio through HDMI on certain Nvidia cards on Hackintoshes, so it is quite likely these methods would work on Macs too.

    They are tedious installs and frequently need to be redone with each OS update.

    I haven't bothered to decipher them.

    The good news is that a 2009 Mac Pro that gets the 5,1 flash suddenly remembers that it can do Audio over not just the DP, but also over HDMI on a flashed 5870. Is it full Dolby 7.1? I have no idea. But kinda neat that a port that doesn't exist on Real Mac 5870 works on flashed ones. Perhaps they developed 5870 drivers on Reference PC board and just left the drivers in?

    Had Apple or Nvidia enabled Audio over DP on the Quadro 4000 than we might have easier ways to enable Audio on newer cards. IIRC, the Quadro 4000 does NOT have Audio.

    Basically, while there may be LOTS of cards that have Video drivers in the OS, for whatever reason they don't bother writing or including Audio drivers UNLESS they have a need.

    I think there was a Mini with an Nvidia card and HDMI. Using those drivers MIGHT get it to work on other Nvidia cards but the device id of the Audio parts of these cards are hard coded. So you would need to switch it out anywhere it appears in drivers. Good luck.

    Mac Nvidia video drivers have always been 2 display channel only. Will be very interesting how they deal with new GTX680, if and when drivers appear for OSX. (They have released a Linux one)
     
  8. slughead, Mar 31, 2012
    Last edited: Mar 31, 2012

    slughead thread starter macrumors 68040

    slughead

    Joined:
    Apr 28, 2004
    #9
    It has to do with certain motherboards not having the hardware capacity to do so (not necessarily Apple's fault). However, 2009 machines can be flashed to allow this feature.

    I've read about the procedure to get audio over HDMI working on hackintoshes. I'm not really interested :)

    I'm doing okay with my 5870 but I definitely don't want to upgrade until I can get another card that allows audio over HDMI. 3 monitors without requiring active adapters would be helpful too (there are no active DP/MDP -> HDMI adapters at the moment as far as I can tell)
     
  9. goMac macrumors 603

    Joined:
    Apr 15, 2004
    #10
    I'm pretty sure the firmware has to activate the feature and vend it to the audio subsystem. It's been my theory since the problem first appeared, and reports of the firmware update to 5,1 fixing it seem to verify that.

    Audio on Macs is traditionally controlled partially by the firmware. PCs don't do any audio from boot, but Macs do it before the OS is even loaded (i.e. the boot chime.)
     

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