A videokártya, or graphics card, is a crucial component in a computer that processes and renders images, videos, and animations. It enhances the visual performance of a system, making it essential for gaming, graphic design, and video editing. The card contains its own processor, known as the GPU (Graphics Processing Unit), which handles complex calculations to produce high-quality graphics. Modern videokártyák come with dedicated memory, called VRAM, which allows for faster data access and improved performance. They connect to the computer's motherboard via a PCIe slot and can support multiple displays. Upgrading a graphics card can significantly boost a computer's overall performance, especially for demanding applications.