You have one. You can have either an integrated video card, which isn’t good for much, or PCI express card. There are a couple different kinds of PCIE cards too these days. what kind of computer do you have? I can help figure out what card you have if you tell me the model or you can look it up online yourself, it has to say somewhere. Or you can go to your device manager in the control panel to find out but that might be hard to find if you’ve never done it before.