Graphics card ir responsible for 3D perfomance in games and graphical applications. It is a device to which you will connect one ore more monitors and maybe a TV set. It is important to make sure that chosen graphics card has all the necessary outputs.
Most important factor to choose a graphics card is the GPU (graphics processing unit). This parameter will define the performance of the card, and cannot be upgraded in any other way, except buying a new graphics card.
Graphics cards with matching GPU`s differ by graphical RAM amount and type, aswell as cooling solution and core frequency.
Amount of graphical RAM delivers performance by playing 3D games in high screen resolution. If you consider yourself a gamer and are planning to purchase a large monitor or several, choose graphics card with RAM no less than 1GB.
Cooling solution is very important choice criteria between in other ways similar cards. Better cooling solution can be found in "alternatives". Look for bigger radiator, bigger coolers (or multiple mid-sized ones) which differs from stock cooling solution. Feel free to ask our customer support for the best offering.
Notice that there are cards with OC (over clock) word in the name of the card. These are factory overclocked versions of the card, which provides better performance, but are less stable and much more noisy.