Unsupported configuration detected action is requi

  Kiyryn007 19:38 28 Aug 2018

Hi I just brought a new graphics card for my dell optiplex 780 but after I install it and plug the hdmi from the gpu into my monitor I get a system halted message saying "this computer has a display port monitor attached and a card installed. This configuration is not supported please remove card or disconnect display port monitor " the only video cable connected to my pc his the hdmi from the gpu to monitor so I have no idea whats going on. I have tried using the vga port on the gpu aswell as dvi with no success. I also disabled the on board graphics in the device manager. The only way to get off the system halted bios page is to remove the gpu. Please help

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