Mid-2011 21.5" iMac performance?

Discussion in 'iMac' started by JoJa15, Dec 13, 2011.

  1. JoJa15, Dec 13, 2011
    Last edited: Dec 15, 2011

    JoJa15 macrumors newbie

    Dec 13, 2011
    [PROBLEM SOLVED] See post later in thread for scores. I was able to install catalyst 11.12 drivers.

    I have a mid 2011 21.5" 2.7GHz core i5 iMac with the 6770m (512mb) graphics card. Recently all of a sudden the graphics performance of the machine in games on windows 7 seems to have decreased. I checked my windows 7 experience score and sure enough it looks like the graphics card score is less as the disk subsystem used to be the lowest score. You can see my score with the attached image.

    My question is could someone else with a similar machine let me know if they get the same scores or better?

    Is there a way to test the graphics card performance in OSX? If there is could someone post their scores for the same machine? If my performance is fine in OSX it would point to a driver issue. If it was in both OS's then it would point to a card problem.

    I also posted my scores for my macbook pro that has a similar card but with 1GB Vram as opposed to 512mb. I would assume the scores should be similar but the macbook is much better.

    Thanks in advance to any help provided.

    - John

    Attached Files:

  2. JoJa15 thread starter macrumors newbie

    Dec 13, 2011
    Any thoughts anyone? At a minimum does anyone have any guides on making sure the video card drivers are correct? The only thing I can think of is the video card drivers are screwed up and that is creating the poor performance numbers.
  3. The-Pro macrumors 65816

    Dec 2, 2010
    try reinstalling drivers, or install older ones. if you recently upgraded drivers, install the ones you had before, or you check if there is another update available.
  4. JoJa15 thread starter macrumors newbie

    Dec 13, 2011
    Problem Solved. I was able to install the latest 11.12 ATI drivers and now my graphics performance scores are up to 6.9.

    Attached Files:

  5. Orlandoech macrumors 68040


    Jun 2, 2011
    Salt Lake City, UT
    Much better difference. Crazy. where did you find the drivers?
  6. JoJa15 thread starter macrumors newbie

    Dec 13, 2011
    I grabbed the drivers from here:

    I made sure to uninstall my Apple drivers first though. When you do that it should use the Generic VGA driver which will change your screen resolution to 800x600 or something like that. Then I installed the drivers linked above.

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