What is the function of graphics card

The function of the graphics card is to "convert the driver"; the graphics card is one of the basic components of the personal computer. It converts the display information required by the computer system to drive the display, and provides progressive or interlaced scanning signals to the display to control The correct display of the monitor is an important component that connects the monitor and the personal computer motherboard. It is one of the important devices of "human machine". Its built-in parallel computing capability is also currently used for deep learning and other operations.

#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

What is the function of graphics card?

The function of the graphics card is to convert the driver.

The graphics card (Video card, Display card, Graphics card, Video adapter) is one of the basic components of a personal computer. It converts the display information required by the computer system to drive the display and provides progressive or interlaced lines to the display. Scanning signals control the correct display of the monitor. It is an important component connecting the monitor and the personal computer motherboard. It is one of the important devices of "human machine". Its built-in parallel computing capability is also currently used for deep learning and other operations.

The structure of a general graphics card is as follows:

Capacitor: Capacitor is a very important component of the graphics card, because the quality of the display mainly depends on the quality of the capacitor. The quality of the capacitor directly affects the quality of the graphics card circuit.

Video memory: Video memory is responsible for storing various data that the display chip needs to process. Its capacity and performance directly affect the display effect of the computer. New graphics cards all use DDR6/DDR5 video memory, and the mainstream video memory capacity is generally 2GB ~ 4GB.

GPU and fan: GPU is the graphics card chip. It is responsible for most of the computing work of the graphics card, which is equivalent to the role of the CPU in the computer. The function of the GPU fan is to dissipate heat to the GPU.

Graphics card interface: Usually called golden finger, it can be divided into three types: PCI, AGP and PCI Express. PCI and AGP graphics card interfaces have basically been eliminated. The mainstream graphics cards on the market use PCI Express graphics cards.

Peripheral interface: The graphics card peripheral interface is responsible for the output task of the graphics card. The new graphics card includes a traditional VGA analog interface and one or more digital interfaces (DVI, HDMI and DP).

Bridge interface: Mid-to-high-end graphics cards can support multiple graphics cards working at the same time, and they are connected to the bridge interface through a bridge.

The working principle and mode of the graphics card

The graphics card is inserted into the expansion slot on the motherboard (usually a PCI-E slot, previously there were AGP, PCI, ISA and other slots). It is mainly responsible for converting the display signals sent by the host to the monitor into general electrical signals so that the monitor can understand what the personal computer is telling it to do. The graphics card is mainly composed of the graphics card motherboard, display chip, display memory, radiator (heat sink, fan) and other parts. The main chip of the graphics card is called "Video chipset" (also called GPU or VPU, graphics processor or visual processor), which is the main processing unit of the graphics card. The graphics card also has memory similar to computer memory, called "display memory", or video memory for short.

Early graphics cards were simply graphics cards that only played a role in signal conversion; the graphics cards we generally use have 3D screen operations and graphics acceleration functions, so they are also called "graphics accelerator cards" or "3D accelerator card". The earliest graphics cards on the PC were the MDA and CGA 2D accelerator cards installed on the 5150 personal computer launched by IBM in 1981.

Graphics cards usually consist of bus interface, PCB board, display chip, video memory, RAMDAC, VGA BIOS, VGA function pin, D-sub socket and other peripheral components. Most graphics cards also have VGA, DVI display interface or HDMI interface, S-Video terminal and Display Port interface.

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