How do I know if I have an onboard (integrated) video card?
To determine if you have an integrated or onboard graphics card, look at the back of your computer, where all of the cords and cables plug into the computer. Find the monitor cable, which connects the monitor to the computer. Look where the cable connects to the computer.
If the connection (VGA, HDMI, or DVI) is near where your mouse, keyboard, USB connections are it is most likely an integrated graphics card in your computer. As shown in the picture above, this computer has no expansion cards and has a VGA and DVI connection for the onboard video. In the case of a tower case, like the one shown above these connections are also typically vertical and not horizontal.
However, if the connector is separate from the other connectors or in one of the expansion slots it is a removable graphics card and not an onboard video card.
It is also possible for a computer to have a motherboard with an integrated video card as well as an expansion video card. The computer should default to the expansion. In the above picture, this computer has both an onboard video and a video card expansion. As can be seen in the picture, the onboard video card has a cover over the VGA connector that prevents the user from connecting a monitor to this connector. Typically with a tower case, when you have a video card in an expansion slot the connector will be horizontal.