Graphics cards are a large part of what dictates the quality of the graphics that your computer is able to display and by replacing these then it's possible to quickly improve the kinds of graphics your computer is capable of and ensuring that it holds ahead of the technology. There are many reasons that this is one of the most important changes you can make to your PC, and we'll exam some of those here.
First of all, changing graphics cards is something that you right away notice. The images your computer creates is the output and the way you interface with your computer. Without this you would be completely unable to use your computer at all, and at the same time this is the quickest and easiest way to measure how good a computer is. While changing the hard drive or adding one will give you more space and help you store more files, this is not something you'll get much benefit from until you start ignoring the space you have, and even then you will not notice it until you come to save a file. Not only will you notice the difference between graphics cards right away, but everyone who comes around to see your computer will too and this will help make your computer impress guests (which lets face it, is one of the reasons we spend so much money on them).
No more will this be the case than when playing computer games, and this is where graphics cards really come into their own and demonstrate the capabilities of your computer. As new compute games come out these also require better and better specs for the computer to be able to run them and that means that for any gaming PC graphics cards are a must and without upgrading them from time to time there will be many games you can 't play, and those you are able to play will look inferior as a result. If you want a very top gaming experience then you should replace your graphics cards, as well as other aspects of your computer such as the RAM and the processor. This will then allow your games to be put on the top setting, increasing the lighting, avoiding 'pop up' (where scenery randomly appears in the distance) and using better textures. This will be more fun to play, will help your competitive performance and impress guests.
It's not only computer games that require graphics cards though, and your normal computer display will also be affected by this. Things like the refresh rate of your screen and the definition of the image are dictated by these cards and today websites and programs are designed for better and better graphical capabilities. Even for business computers then or those used just for work, it's important to be able to use the best graphics cards, and this becomes even more important if you are involved in design of any sort and particularly web design where you need to be able to test our layouts on a variety of resolutions.