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Nvidia GPU Not Detected By Windows

Last response: in Graphics & Displays
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June 26, 2013 6:53:21 AM

Hello Everyone,

I am trying to troubleshoot a few problems with my desktop PC. I was getting some weird FPS drops and graphical glitches with my ATI Radeon 4870 GPU. Now I know this is an older card, but I felt as if it was acting strangely.

I have a NVIDIA Geforce 9600gt card that I salvaged from another computer that had a faulty motherboard. I decided to try it so see if the glitches would go away. I know that the 4870 is a better card, but I wanted to troubleshoot it.

Anyways, when I first connected the new card it booted up fine. I removed all of the Catalyst Control Panel drivers and used Driver Sweeper to try and remove anything left over before I switched the cards.

I downloaded the latest Nvidia Driver and installed that. It seemed to have no problems, but when I rebooted my monitor could not detect any signal from the video card. I couldn't figure out what to do, so I plugged in a VGA cable to my integrated motherboard GPU to get an image. It worked, but now the Nvidia Card won't even show up in device manager. I am wondering if there is a conflict because it is an ATI integrated card. I tried to make the BIOS use the dedicated card only, but the option was greyed out. I suspect this was because I was using the integrated card to even be able to see the BIOS.

Any suggestions? Or am I going to have to put my original card back in and hope for the best?
June 26, 2013 7:11:06 AM

Hi nguinn,

If you can't even see the bios with the Nvidia card then it is a hardware issue. If you can see the bios then it is probably a software problem and my best guess would be that you accidentally went to far with driver sweeper and deleted something that the Nvidia graphics card relies on. This is solvable by using the windows installer disc to attempt to repair or restore a backup.
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June 26, 2013 7:15:45 AM

liquidsnaske said:
Hi nguinn,

If you can't even see the bios with the Nvidia card then it is a hardware issue. If you can see the bios then it is probably a software problem and my best guess would be that you accidentally went to far with driver sweeper and deleted something that the Nvidia graphics card relies on. This is solvable by using the windows installer disc to attempt to repair or restore a backup.


Yeah I read after I already did it that Driver Sweeper could cause problems... :lol: 
My Bios is only showing my RAM and CPU. I will try a repair install.
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June 26, 2013 8:18:45 AM

I don't think my BIOS actually shows the GPU at all, even when it was working. I am trying to do a System Restore to see if that can solve this issue. I really think that Driver Sweeper must have broken my PCs ability to use a dedicated card. I guess I will have to be more careful in the future and do a re-install if all else fails.
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Best solution

June 26, 2013 8:41:32 AM

Driver sweeper will only affect the software, it can not affect anything before the pc goes into windows. What I meant in my previous post was: when you have the Nvidia card connected to the monitor can you get into the bios and do you see the initial screens before the windows logo usually shows? If you can not see them and the monitor stays blank the card isn't working, so make sure it's properly inserted and all power connectors are connected.
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June 26, 2013 10:30:36 AM

liquidsnaske said:
Driver sweeper will only affect the software, it can not affect anything before the pc goes into windows. What I meant in my previous post was: when you have the Nvidia card connected to the monitor can you get into the bios and do you see the initial screens before the windows logo usually shows? If you can not see them and the monitor stays blank the card isn't working, so make sure it's properly inserted and all power connectors are connected.


I guess that makes sense. I think the card is bad. The original card worked perfectly when I put it back in. When I had the Nvidia card in, I couldn't even see the BIOS at all, it was as if the card wasn't even there.

Anyways, thanks for your help.
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