I've added another page detailing the specifics of graphics cards and the different brands available. Graphics cards are easily one of the most influental pieces of hardware in a device, as the better the graphics card, the more important the other specs are in utilizing the card to the fullest. For example, if you were to get the best graphics card on the market the special functions of the card would not work unless you had a monitor with the resolution capable of displaying it. Or, if your CPU and RAM struggle with the workload the graphics card presents you will not get your worth from the money you spend on that card. Generally, the better the graphics card, the more expensive the entire device will be due to the rest of the device requiring better hardware to run the graphics. It is very important to understand what you plan to use your device for so that you choose the best option for both your economic and practical needs.
This image is a picture of a computer with an AMD graphics installed and running. Luckly, graphics cards aren't all that difficult to install, but choosing which one or picking the right manufactored device is. Picture is taken from Public Domain, site linked.
We'll be comparing a few different graphics cards and explaining the best way of utilizing them into the task they are best at.
If you'd like to view more graphics cards and information, visit tomshardware.com.