The graphics card takes over the task of graphics output in a computer. The data calculated by the processor and sent to the card are converted into images so that they can be displayed on a monitor or using a beamer. Decisive for the purchase of a graphics card is the performance of the GPU (graphics chip), the size of the VRAM (graphics memory), the cooling characteristics of the model (custom designs) and the various connectors (DVI, HDMI, Displayport).
As a customer you can use the products of well-known brands such as Asus, MSI, Gigabyte, Palit, Zotac, Gainward, KFA2, PNY, Sapphire, XFX, AMD, EVGA, Powercolor, Inno3D, Matrox and Dell. Some of them are model-specific, i.e. they can only be used for a specific model or brand of computer.