firewire soundcard makes my iMac lag

Discussion in 'iMac' started by bontempi, Jul 18, 2009.

  1. bontempi macrumors member

    Joined:
    May 14, 2008
    #1
    hello

    when i plug my firewire soundcard (Echo Audiofire 8) to my new 24" iMac 2.66 ghz + 4 gigs RAM + 9400M , the graphics aren't fluid anymore.

    Dashboard lags, expose lags ... it doesn't "slow down", there's just a clear drop of frame per second, that makes me feel i'm back to a GMA950.

    there's nothing in the activity monitor that takes too much CPU.
    i restarted the mac : same thing.

    fresh OS 10.5.7 ... don't get it. any idea ?

    thanks
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #2
    Drivers maybe? Some 3rd party hardware aren't OS X best friends
     
  3. bontempi thread starter macrumors member

    Joined:
    May 14, 2008
    #3
    i plugged an external hard drive instead of the soundcard (which needs no drivers)

    when i copy files : the lag appears
    when the disk is iddle : no lag

    ...

    looks like either the iMac or the OS has a problem
     
  4. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #4
    Your FireWire port can be defective. I would give Apple a call.
     
  5. bontempi thread starter macrumors member

    Joined:
    May 14, 2008
    #5
    spent half an hour with apple.
    we haven't found anything. he told me to return the iMac if i wasn't happy as it's brand new

    then i've found this thread
    http://discussions.apple.com/message.jspa?messageID=9248655

    looks like a driver problem ... hope it will get fixed with 10.5.8

    i will do some tests in windows with bootcamp
     
  6. Hellhammer Moderator

    Hellhammer

    Staff Member

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    #6
    Okay, good. nVidia drivers sucks because Apple writes them.
     
  7. bontempi thread starter macrumors member

    Joined:
    May 14, 2008
    #7
    how is that ?
    is there any documentation on the matter ?

    thanks !
     
  8. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #8
    I don't know why Apple writes them. Maybe nVidia has enough work already. That's what I've heard and people usually recommends ATI for better drivers.
     

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