Restart the Pc and when it boots up the first thing it shows could be the graphics card name. It might show a splash thou which is the motherboard name which will take up the whole screen and be very colorfull. You can turn this off to show your graphics cards name.
Itll be in the top left hand corner, it'll say nvidea xxxxxx that is the graphics card name.
Some cards can run two monitors or a monitor and TV so have different drivers.
Give it a go and post what card it is and ill send you a link for the drivers.
Jim