Dell Optiplex 390 MT wont detect my evga geforce gtx 750 ti 2gb GPU - help!!!

I am beyond frustrated, I have a Dell OptiPlex 390 MT and have the following specs:
Mobo: OEM Dell
Ram: 2x 8 Gb ballistix ddr3
Hdd 500GB sata Hdd
Psu: Evga 500w
Cpu: Intel i5 2400
Gpu: Evga GeForce gtx 750 ti 2gb

My pc wont detect mt gpu no matter what I do and I am missing the video options on the bios. ,Fans are spinning, I have connected and disconnected it, have tried to manual install NVidia drivers and it wont let me, even did a full computer restore, and used the ddu app to clear all previous video drivers. I'm just hoping for some advice to get thus gpu going any help is appreciated.
Reply to Morgan Leonard
8 answers Last reply
More about dell optiplex 390 wont detect evga geforce gtx 750 2gb gpu
  1. There are a couple things to consider.

    1- Your computer has a UEFI BIOS. GTX750 come with either that or an older Legacy BIOS. If you have the older one then you have to change a couple BIOS settings to make it work. Contact GPU support, or Dell community forums for how to do this. There also may be a BIOS setting from onboard to PCI graphics. Check the user manual at Dell Support.
    2- You said you removed the old drivers. Install new GPU and boot into Safe Mode with Internet (F8). Install latest drivers there.
    You could have both issues. Check the BIOS issues first as it will keep you from fixing the drivers.
    Reply to william p
  2. william p said:
    There are a couple things to consider.

    1- Your computer has a UEFI BIOS. GTX750 come with either that or an older Legacy BIOS. If you have the older one then you have to change a couple BIOS settings to make it work. Contact GPU support, or Dell community forums for how to do this. There also may be a BIOS setting from onboard to PCI graphics. Check the user manual at Dell Support.
    2- You said you removed the old drivers. Install new GPU and boot into Safe Mode with Internet (F8). Install latest drivers there.
    You could have both issues. Check the BIOS issues first as it will keep you from fixing the drivers.



    Thanks ill do as you said and go into safe mode and make the necessary steps. Will be back to update on what happened. Fingers crossed!!
    Reply to Morgan Leonard
  3. Have tried to boot into safe mode, uninstalled all video drivers and still nothing; windows wont allow installing any drivers for my gpu because it still says theres no hardware for those drivers. It just wont detect my gpu. Any ideas? Already contaced dell and still no answer from them.
    Reply to Morgan Leonard
  4. william p said:
    There are a couple things to consider.

    1- Your computer has a UEFI BIOS. GTX750 come with either that or an older Legacy BIOS. If you have the older one then you have to change a couple BIOS settings to make it work. Contact GPU support, or Dell community forums for how to do this. There also may be a BIOS setting from onboard to PCI graphics. Check the user manual at Dell Support.
    2- You said you removed the old drivers. Install new GPU and boot into Safe Mode with Internet (F8). Install latest drivers there.
    You could have both issues. Check the BIOS issues first as it will keep you from fixing the drivers.



    Evga support answered this to me via email:

    Hi Morgan,

    Sorry about the trouble with your card. For older Dell PCs, you may need a BIOS update to use cards above the 600 series, as they require the new UEFI BIOS released in 2013. You'll need to contact Dell support for an update if available. Please check the back of the PC case for the service tag, then go to the Dell support page, enter your tag, and look for the downloads for your PC. If a BIOS update is available, it may be listed there, with instructions on updating the PC.

    Please contact us with any further questions.

    Regards,
    EVGA Support.

    How does thst help me? Thete isnt as far as I know any other bios version and the current bios wont let me switch from kegacy to ufi ssys "no hard drive volume detected!" Does anyone knkw what i can do??
    Reply to Morgan Leonard
  5. Dell is really bad about helping with anything they didn't sell. If you ask a generic question like how to install a discrete GPU then they might unintentionally be helpful. It seems to me that you're missing a BIOS switch to disable the onboard GPU.
    I see people running them on your system here.
    http://www.userbenchmark.com/System/Dell-OptiPlex-390/1958
    So there should be a way.
    Reply to william p
  6. william p said:
    Dell is really bad about helping with anything they didn't sell. If you ask a generic question like how to install a discrete GPU then they might unintentionally be helpful. It seems to me that you're missing a BIOS switch to disable the onboard GPU.
    I see people running them on your system here.
    http://www.userbenchmark.com/System/Dell-OptiPlex-390/1958
    So there should be a way.

    Thats the golden question; HOW DO I DISABLE ONBOARD GPU FROM BIOS?? It doesnt even give me that option :(
    Reply to Morgan Leonard
  7. Try Dell Forum.
    http://en.community.dell.com/
    You get help from users and the Moderators work for Dell.
    Reply to william p
  8. william p said:
    Try Dell Forum.
    http://en.community.dell.com/
    You get help from users and the Moderators work for Dell.


    Already did. Dead end.
    Reply to Morgan Leonard
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