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-AJ-

Mobo doesn't detect GPU

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Ok, what you need to do now is to shut your computer down properly, turn off power supply  and press the start button until all the lights go off on the motherboard which completely drains all power from system.  Remover just the power cables from the old card and hook them up to the new card, plug the cable to the monitor up to the new card, turn the power to the PSU on then start the system.  If you get nothing on the display after a few moments, just unplug the cable to the monitor and plug it back into the old card so we can go further.  The old card should still display even without power, it will draw enough power from the pcie lane at idle to work.  GO, and cross your fingers.  Read this twice and make sure you do this exactly, there is a reason for doing it like this.

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Posted · Original PosterOP

I did that. Upon starting the Pc I got a high pitched sort of screetching sound (kindof like a warning sound) and no display. I turned it off again to stop the sound and put the cables back to where they were and it's now running again.

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Good, so it's not the windows version, new nvidia cards will not work with version before 1511.  So, lets try this.  Shut down, turn off PSU, hold down start button then remover the old card and hook power and display to new card and start up.  If this don't work, shut down and put the old card back like it is now.

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Okay, there is sometimes with AMD boards that you have to use a different driver version or in worst case do a fresh install of windows 10.  Did you buy your Windows 10 or is it a education version or anything different than just retail?

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Posted · Original PosterOP

I got it through the free upgrade program that Windows offered. It's an upgraded Win7 installation. But I don't see how that could be a problem, as the motherboard won't even pass POST, long before Windows is booted.

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Posted · Original PosterOP

Well, my monitor has only two HDMI and one VGA port. And I don't have a VGA cable at hand right now, much less a DVI to VGA adapter or something like that.

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No, that's why if you'll look at why guys used to used jumpers on multiple video cards doing mining.  Take a DVI and use a capacitor and jump it from one port to another on the DIV so the card could be recognized.  Try this go to device manager and look again.  Click "view" and then "hidden devices" and see if it shows up.  probably wont but it's worth a try.

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Posted · Original PosterOP

Didn't work. The installer says "Microsoft Visual C++ Redistrutable packages for Visual Studio cannot be installed in safe mode.

This graphics card driver could not find compatible graphics hardware".

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