A graphics card is a device that converts the signal from the computer to a form so it can be displayed on the monitor.
There are a whole range of graphic cards from the cheapest to the professional with prices in the value of thousands dollars. It's up to you to use which one you need. Most computer vendors offer computer assemblies based on individual component pricing and do not even take into account the actual needs of one or the other customer. Graphics cards differ in their processors, memory types and sizes, the bus for which it is intended, and the expansion capabilities.
The bus on the computer is a communication channel, after which each component exchanges data. The bus itself would not be too interested in the bus if there were no more types, and each type ended with a different type of connector for connecting other devices, such as a graphics card.
On a personal computer, you will most often encounter four types of bus: ISA, PCI, VL-Bus, AGP, PCI Express. If you have a very old computer (max 486), then only use ISA cards. However, if your computer already has a PCI bus, then the card will be in the interest of speed for this bus. At least some decent computers are equipped with PCI Express, which allows for even higher speeds and brings many other benefits.
In principle, we distinguish between two types of memory: slow (RAM, DRAM ...) and fast (FastDRAM, SGRAM, VRAM, WRAM ...) Slow memory cards are very cheap but just for basic computer use. However, if you work in office applications and in simple programs, then such a card will suffice. In graphics-intensive programs, where you do not want to slow down your computer unnecessarily, a large part of the image needs to be calculated by the graphics card.
When purchasing a video card, the merchant may mention that it is a 64, 128, 256 or 512-bit card. This number tells you how much graphics data the processor can handle on the card, and thus, to some extent, performance. The larger the number of bits, the better the picture is the card can create.
Maybe some of you still do not know what the speed of the graphics card is and what a quick card is. So then: If you only write texts, you do not need a too fast card. However, the card may not be too slow. Even the image you see as static (in motion) is in fact constantly renewed. However, a weak card does not restore the image fast enough and the image is blinking visibly, which will make your eyes short of pain. The larger the picture you use, the slower the card will restore.
Experienced expert can sneak out a number of professional terms, but do not need to worry unnecessarily. If you do not have any special demands on your computer, then there are many cards on the market that will fully meet your needs. Standard in this area are cards with a memory size (on a graphics card, not on the motherboard) of 512 MB to 8 GB. However, if you want to use more demanding programs and above all games, it is better to ask for a so-called graphics accelerator (also referred to as a 3D card). These are many and their performance varies considerably. It's probably better to consult an expert or consult a specialist magazine that sometimes compares and evaluates such cards. In general, you can follow the CPU, memory, and bus advices listed above.
The amount of memory also limits the so-called image resolution. The image consists of individual points, and the more the points are, the more information you can see. If you are running a monitor with a 14 "diagonal screen, you should not use a resolution of more than 800 x 600 pixels and a 1 MB memory card is enough (in a 3D graphic there is a true 8 MB minimum because it is displayed at one time multiple images (textures) that make up the resulting image.) 15 "The monitor can now display 1024 x 768 pixels, and twice as much memory is needed.
Some computers have a graphics card integrated on the motherboard. This means you will not find the (removable) graphics card on your computer. You can recognize this board as the monitor connector is located directly on the board or connected to it by a flat cable. The disadvantage of an integrated graphics card is that it can not be replaced in case of a malfunction even if you need a more powerful card. However, such cards can be decommissioned for high-quality plates.
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