So what does a graphics card do exactly? If you have even a vague interest in 3D work, video production or gaming, you probably know that they're important and can make for a much more enjoyable experience. You might also be thinking that you need one (or need a better one), but you may have doubts about exactly what their role is and how much difference the best graphics cards can make.
In the overview below, I've attempted to summarise what graphic cards do, why they're important and why you might need to buy one. Since Black Friday is fast approaching, I've also included some tips on where to find a deal since Black Friday is one of the best times of the year to buy a graphics card for less (see our own roundup of the best Black Friday graphics card deals).
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