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Help with pc gpu issue

I had a gtx 1060 6gb installed in my pc worked fine. I then removed it and installed an old gtx 780 to test it for a friend worked fine I updated the drivers on my pc with the gtx 780 installed. The I then removed the 780 and inserted the 1060 it posted bios and was in the process of booting to windows then the screen remained black. What is going on?
Edit* re-installed the 780 pc works fine so it's not anything with the 780 power supply or motherboard. I'm guessing it's software but what do I do to fix it?
Reply to gax007
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More about gpu issue
  1. So you cannot get the 1060 to work? Or was it just that one time?
    Reply to MrN1ce9uy
  2. MrN1ce9uy said:
    So you cannot get the 1060 to work? Or was it just that one time?


    I removed the gtx 1060 and re connected everything and it still does the same thing. So it's software or the 1060 which makes no sense to me as it is brand new was just working prior to the switch and update and was not dropped or mis handled in anyway. The only other thing different in the 4K monitor which the 1060 worked fine on for days.
    Reply to gax007
  3. Use Display Driver Uninstaller to remove drivers then install the 1060.
    Reply to MrN1ce9uy
  4. MrN1ce9uy said:
    Use Display Driver Uninstaller to remove drivers then install the 1060.


    This is where my very limited pc experience comes into play.... what exactly do I do for that. Do I keep the 780 in and uninstall the GeForce graphics divers? Or what?
    Reply to gax007
  5. Yes, leave the 780 in and in DDU there's an option for removing drivers and shutdown to install new GPU.
    Reply to MrN1ce9uy
  6. MrN1ce9uy said:
    Yes, leave the 780 in and in DDU there's an option for removing drivers and shutdown to install new GPU.


    Alright I'll give that a go. Another dumb question for you where exactly is the DDU I'm asumeing it's an acronym for something maybe display driver utility? As I've said I'm not that great at anything software wise or basic knowledge. I had a friend set up everything for me.
    Reply to gax007
  7. Display Driver Uninstaller, you'll have to download it. http://www.guru3d.com/files-details/display-driver-uninstaller-download.html
    Reply to MrN1ce9uy
  8. Ah I was assuming that. Seems like a lot of trouble that's not needed for switching cards. Guess 2017 is still not a bug free year. It says on the page I can try to uninstall from the control panel do I try this first.
    Reply to gax007
  9. I've always been told to stay away from using the control panel for driver installation/uninstallation. You can't get any better than using DDU in safe mode.
    Reply to MrN1ce9uy
  10. Well I read the guru3d page and it said as a last resort if it doesn't work from control panel but is it better to skip step I don't like installing programs that I don't need on my pc.
    Reply to gax007
  11. Also don't like that is says I require a backup? Sounds like a potential big problem. All for switching cards.
    Reply to gax007
  12. I'm going to head over to nvidea blog for more information.
    Reply to gax007
  13. Best answer
    However you do it, uninstall the driver and try using the 1060. If it still doesn't work, use DDU.
    Reply to MrN1ce9uy
  14. MrN1ce9uy said:
    However you do it, uninstall the driver and try using the 1060. If it still doesn't work, use DDU.


    Will do thank you for taking the time to reply back to me.
    Reply to gax007
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