Download and run Everest Home Edition (freeware) and it will tell you exactly what video cards and / or adapters are installed.
You can then go to the manufacturer's website and get the latest drivers.
Everest Home Edition
Everest Home Edition (the successor of AIDA32) is a system information and benchmarking tool with full hardware & software information available as freeware for the individual user. It comes with a built-in hardware database and physical information for CPU, motherboard, hard disks, optical drives, chipset and much more. The information can be displayed on-screen, printed, or saved as a report in HTML or text format. The built in diagnostics module can help you find potential problems, by higlighting them in the report and also includes links to manufacturers web sites, driver updates and more. An easy to use report wizard allows you to create detailed reports in the format of your choice.