Determine which brand of graphics card is installed on my system

1. From the desktop, launch a new terminal session by selecting: Applications > Accessories > Terminal. A new terminal window will display.
2. At the prompt (the blinking cursor), type: lspci | grep VGA then press Enter. This will return something similar to: 01:00.0 VGA compatible controller: nVidia Corporation G86 [GeForce 8400M GS] (rev a1)
3. From this information, it is clear I have an NVIDIA GeForce 8400M GS graphics card.