iMac AMD 6770m Driver in Windows

Discussion in 'Windows, Linux & Others on the Mac' started by FranksWildYears, Jul 22, 2011.

  1. FranksWildYears macrumors regular

    Aug 1, 2010

    Having got Windows 7 up and running on my new iMac, I've met an irritating problem - I cannot install the latest driver for the 6770m GPU and am forced to use the Bootcamp one from January, which of course is hopelessly out of date.

    This seems odd, because up until...yesterday I've been using a late 2010 iMac. That hd a rebadged mobility GPU, so it was just a case of looking up the proper name (not thie 5670 it's advertised as) and installing the latest Windows driver.

    However, I can't do that here - I select the 6***m series on AMD's website (this one is going by its real name to the best of my knowledge), download the driver but on install I'm quicky met with a message along the lines of "Your computer contains no graphics adaptor".

    This is particularly annoying, because although it runs software far better than my previous system, there are quirks and the odd inferiority where it should be a complete walkover - things that were fixed by being able to have the latest driver.

    Any help or suggestions of a work around would be greatly appreciated. Thanks!
  2. MysteriousKiwi macrumors newbie

    Sep 15, 2011
    Solved your problem? It has mine....

    I too have just had this problem, but have found a solution.

    Don't use the web installer version, use the package version.

    I'm running an iMac (2.8ghz i7, ATI 6770m, 8gb ram... etc) and this has worked like a charm, detecting the iMac display, external 1080p 23" monitor aswell. I have full catalyst control over the 6770m card.

    goto (for 64bit windows):


    goto (32bit windows)

    Install the full 80-90mb package and in the installation it will detect your gpu and give you full control :D

    Worked for me, and i hope you have the same luck! :D :)

  3. ckeck macrumors 6502a


    Jul 29, 2005
    Is there a way to get an updated driver installed for the 6770m? The driver I have is from Jan 2011 (from Apple) which is pretty old by GPU driver standards and I'm having some performance issues w/ newer games.

    Any advice would be appreciated.
  4. eMOeSTe macrumors newbie

    Nov 27, 2011
    ATI 6770m Driver Update


    Can anyone help with that? I am looking for the answer as well.

    I was trying everything already and nothing works!!

    Please help!!
  5. riconc macrumors newbie

    Aug 18, 2010
    New Caledonia
    ATI Catalyst Mobility driver (iMac and Macbook use mobile version of ATI GPU) is only a reference driver with limited support for system vendor.The installation software include a verification to prevent driver download and installation on some products (including Apple iMac and Macbook) to protect against disabling features or functionality provided by the system manufacturer (Apple).

    Sure Catalyst Control Center can be installed, but the driver isn't updated.

    But ATI beta drivers don't include the software verification and so can be installed on a iMac or Macbook. Latest 12.1 (12/12/2011) preview driver (which should install fine):
  6. Debaucep macrumors newbie

    Dec 23, 2011
    Hello, that's how I managed to make new ATI Driver Installation (12.1 beta)for MacBook Pro 15, late 2011.

    The procedureis kinda odd, but if you follow my instructions, you will do it.
    So, when you have your Boot camp installed, you have freaky ATI drivers.
    At first all you need to do is to remove them from the system totally.

    To do this follow easy steps:
    1. Download two programs -- Driver Sweeper and Driver Cleaner.
    2. Start Driver Sweeper. Select AMD and clean all records.
    3. When done, the system will ask for reboot. No, we gotta do it later.
    4. Start Driver Cleaner.
    5. From the pop-up list, select ATI.
    6. Delete all the records.
    7. Go to Program files and delete all the ATI and Catalyst stuff.
    8. If you have Windows 7 installed go to Program Files x86 and delete all the ATI and Catalyst stuff.
    9. Go to Windows\Assembly. Sort all the stuff there by key.
    10. Delete all the records with key 90ba9c70f846762e.
    11. Do not delete any other keys!!
    12. Go to Regedit (Start--"regedit" (without brackets) and push enter).
    13. Use CTRL+F to find all ATI and Catalyst names.
    14. When found, delete them all.
    15. Restart PC in Safe mode (Reload, when you have black screen, pust F8 button several times).
    16. Go to Computer - Properties - Device manager.
    17. Find you video adapter (in my case it was ATI Radeom 6770) and remove it from the system.
    18. Restart.
    19. Load Windows in normal mode.
    20. Install Microsofr Frameworks 3,5.
    21. Install Catalyst Driver you would like!

    NB !!!!The main thing you need to know is that you CAN NOT install drivers directly from Web Interface (read ATI website), because that dirvers do not pass manufacturer verification. To install what fresh dirve you would like , you need corresponded Catalyst have downloaded!!!

    Disclaimer: All the stuff you do, you do on your own risk.
    The author just shares his own experience and hopes it could be useful.

    Suggestions? Questions?
    Please contact me on

    PS The most Fresh Drivers are 12.1 beta.
    I have them and quite stisfied.
  7. sk zen macrumors newbie

    Jun 10, 2011
    can you explain steps 9 and 10? kinda worried about messing with this stuff since i've never done it before.
    also, can anyone else verify this? so tempted to try it now...
  8. Debaucep macrumors newbie

    Dec 23, 2011

    9. Go to your HDD where Windows is installed. Find folder Assembly
    10. When done enter this folder and you will se quite a lot files there.
    Every file has a key. There are some kinds of groups of keys.
    You can sort files by a key (from largest to smallest or visa versa)
    Then find all files keyed 90ba9c70f846762e and delete them.

    That is.

    Hope it helps.

    If still face some troubles, please mail me, I will contact you as soon as I have some time. Btw it will be quicker then go to Forum.

    Regards, Debaucep

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