GTX 980 Ti Not working on Bootcamp Mac Pro 4,1

Discussion in 'Windows, Linux & Others on the Mac' started by elliots11, Dec 6, 2015.

  1. elliots11, Dec 6, 2015
    Last edited: Dec 6, 2015

    elliots11 macrumors newbie

    May 23, 2011
    Hey all,

    I have a Nvidia GTX 980 Ti reference model by Zotac, I just picked it up last week, an unflashed, stock PC card. I wanted to get it running on Windows 7 via bootcamp so I have that as an option, but it doesn't power the display even though it's recognized by the device manager. I'll boot on the GT120 my Mac came with and try to switch the DVI cable for my 30" Cinema Display to the 980, but when I do that it doesn't work, it's just a black screen. Works fine on the Mac side ironically.

    I found this thread:

    But when I try to remove the GT 120 it never displays a picture, and I've also tried changing the GT 120's driver to Generic VGA Device in Device Manager.

    - I was able to install the cards drivers off the disc, it's on the NVidia driver per device manager.
    - The GeForce Experience App says 341.92 Driver is available, but it's unable to connect to NVidia, despite me clearing it in the Windows Firewall.
    - Not real sure what to make of the driver naming discrepancy.
    - Tried updating via device manager, but it said I had the latest version, but there's still no image :-/

    Anyone run into this or have an idea for a fix?
  2. SoyCapitanSoyCapitan macrumors 68040


    Jul 4, 2015
    You must uninstall all Nvidia drivers and apps, remove the GT120, boot back with only the 980 installed, then reinstall the newest driver. Then the 980 will work.

    If you have Windows 8.1 or earlier, you will then be able to reinstall the GT120 for a second card, but you must not let Windows install a driver for it, disable that driver in software updates. The old Nvidia driver for that is not compatible with your newer card and vice versa. They clash. The GT120 can run fine with the generic Microsoft Video Adapter driver.

    If you have Windows 10 you will not be able to use the GT120 with the newer card because Windows will force install the older driver and you will have a clash again. You can't disable the update.
  3. elliots11 thread starter macrumors newbie

    May 23, 2011
    Thanks, will give it a shot
  4. H_Robb macrumors newbie


    Jul 2, 2017
    I'm assuming this worked for you? Having a very similar issue with my gtx 780ti and this is the only forum I've found with this issue.
  5. elliots11 thread starter macrumors newbie

    May 23, 2011
    Yes, this worked
  6. H_Robb macrumors newbie


    Jul 2, 2017

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