Vertex CAD programs use the Microsoft DirectX programming interface to display 3D graphics, and DirectX 11 support is required for the graphics card.
You do not necessarily need a separate CAD graphics card. However, a more powerful graphics card will improve the performance of Vertex CAD, as the Vertex graphics engine will be able to take advantage of the graphics processor's performance.
For example, Nvidia Quadro series graphics cards have been found to work well with Vertex CAD.
If you have an Nvidia graphics card, you can download the driver update from the Nvidia website: www.nvidia.com.
Working with Vertex does not require changes to the default settings of the graphics card.