Which exact model of graphics card is it?
For example is it a Gigabyte GeForce 1050 2GB OC?
Does your new card have any power connectors on board and have they been connected to your Power Supply unit?
Is the card sitting fully in the PCIE port?
Is the display connected to a port on the card and not the motherboard display.
Have you tried downloading the latest drivers from Nvidia themselves? I suggest doing that any way as the old drivers were found to be a security risk fairly recently.
What were you using previously for graphics?