Follow below steps to check which video card is installed on the computer:
Click on Start and then Control Panel.
Click on the Performance and Maintenance link.
In the Performance and Maintenance window, click on the System icon near the bottom of the window.
In the System Properties window, click on the Hardware tab.
With the Hardware tab selected, click on the Device Manager Button.
You can now use Device Manager to update device drivers, view the system resources a particular hardware device is using, etc.
Click the PLUS SIGN to expand Display Adapters.
Double-click the video adapter driver which would give you information about the video card.