your mobo should have at least a vga and most likely dvi connection. run off your mobo/chip video until you get it squared away.
that said, you should still get picture with a new gpu it just wont be pretty until the drivers are installed. I found with my 1050ti it even installs some legacy drivers itself. When I installed GeForce experience it indicated I had existing NVidia drivers. a few minute into windows the picture resolution improved to my monitor settings. thought that was kinda neat.