yes you will need to know your video card type first. Find out if its onboard or VGA - video graphics accelerator. (the specification for most video cards today) if your card is a geforce card you can find drivers at
www.nvidia.com if its an ati then you will have to know the model of the card most likely. and like edwin said you may need to find your motherboard manufacturer and download the drivers from them. Is your system prebuilt (dell, gateway. HP) or custom built? If its a name brand your drivers may be on a cd that came with the system