Mountain Lion 10.8.3 Update Graphics jittery

Discussion in 'iMac' started by kevtucker, Apr 1, 2013.

  1. kevtucker macrumors newbie

    Joined:
    Jun 3, 2011
    #1
    Hi,

    Just updated RAM in my 27" Late-2012 iMac 2.9Ghz Intel Core i5.

    It had 8 Gb but I have added 2 x 8 Gb of Crucial 1033 DDR3 RAM which I pulled from my 21.5" iMac so now have a total of 24 Gb.

    Now I recently upgraded to 10.8.3 and now i'm having Graphics issues where scrolling in Chrome or Safari is causing the window to Jitter, also happening when scrolling Applications folder or when i'm opening photos using QuickView.

    Just wondering if anyone having same issue since updating to 10.8.3

    I have tried resetting PRAM, also think I had an update for some Apple Intermedia Codecs today too for Motion 5.

    Thanks

    Kevin.
     
  2. Raima macrumors 6502

    Joined:
    Jan 21, 2010
    #2
    Your 8GB of RAM was running at 1600Mhz. Since you've added in your old RAM, all your RAM speeds have stepped down to 1033Mhz so everything runs in a compatible mode.

    It's not 10.8.3 that makes your graphics slow, it's the extra RAM you added.
     
  3. buysp macrumors 6502

    Joined:
    Feb 12, 2013
    Location:
    Sydney, Australia
    #3
    As Raima stated, put 1600Mhz sticks in them and that should do the trick.

    Cheers
     
  4. kevtucker thread starter macrumors newbie

    Joined:
    Jun 3, 2011
    #4
    Thanks for replying guys but having same problem after removing the extra 16 gb ram I put in.

    Screen is just doing the same and have tried resetting PRAM too.

    Cant remember it doing it before I got an update for the Motion 5 software it only seemed to start after that.

    Kevin
     
  5. kevtucker thread starter macrumors newbie

    Joined:
    Jun 3, 2011
    #5
    Well. Done s restore back to Saturday but still the same issue. So going to fresh install 10.8.3 if still the same I'll contact Apple
     
  6. bmcgrath macrumors 65816

    bmcgrath

    Joined:
    Oct 5, 2006
    Location:
    London, United Kingdom
    #6
    I thought when you paired slower RAM in it didn't have that much of a drastic effect (unless you're performance mofo) :D but surprised it's having that much of an effect on the graphics!
     
  7. passey macrumors member

    Joined:
    Mar 28, 2013
    #7
    I had this issue on my 21" imac.

    Just started randomly. Tried a refresh of mountain Lion didn't work.

    Did a full erase and reinstall last night and it fixed mine.
     
  8. kevtucker thread starter macrumors newbie

    Joined:
    Jun 3, 2011
    #8
    Thanks for reply.

    Just on with a fresh install now. Did a restore but seemed worse than before. Hope this works.

    Kevin
     
  9. heiny, Apr 8, 2013
    Last edited: Apr 8, 2013

    heiny macrumors newbie

    Joined:
    May 21, 2006
    #9
    I have the same issue here:
    iMac 27" Mid-2010
    16GB Ram (1333MHz)
    and ATI Radeon HD 5750 1024 MB

    Are there any ideas/experiences how to solve the issue, besides reinstalling?

    EDIT: ok, solved .... following this instruction:
    https://discussions.apple.com/message/19880198#19880198
     
  10. kevtucker thread starter macrumors newbie

    Joined:
    Jun 3, 2011
    #10
    I am going to try putting the Memory back in and see if the issue arises again and then try this if it does.

    Thanks

    Kevin
     
  11. kevtucker thread starter macrumors newbie

    Joined:
    Jun 3, 2011
    #11
    Right i'm going to update the Codec that I think caused the problem before see what happens.

    Keivn
     

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