need drivers OR find graphic card model number or name ?

If your using windows

press start type dxdiag.exe and open it, and click the tab that says display. There will be all the info on your graphics card.

Then just do a seach on your driver and look for the driver, however try to stick to the manufactures websites.

Contact the manufacturer of the graphics card and get the driver from them. That's the best and safest way to get the proper driver. They should have a list of their driver downloads.

Windows should provide the latest signed driver for your video processor via the Windows Update.

However, you can always elect to install the driver directly from the manufacturer:

First, find the video processor model using the GPU-Z free app -> http://www.techpowerup.com/gpuz/

If it's an AMD/ATI processor, look for the driver here (or your regional driver website) -> http://support.amd.com/en-us/download

If it's an Nvidia processor, then look here (or your regional driver website) -> http://www.nvidia.com/Download/index.aspx?lang=en-...

Your not offering nearly enough information about your computer (make/model) or Operating system (Linux, Windows version, etc.). Windows itself should have drivers preinstalled, and the latest drivers should be able to update through windows update.