Personal computer architecture and related components
Display Adapter (Video Graphics Array, VGA)
We often debugging resolution of the display, the general focus of the display image that resolution and color depth,
color display each image will take up memory, so there will be a display adapter 内存的容量.
This display adapter's memory will affect your screen resolution and color depth!
In addition to the display adapter's memory, because the popular 3D games, the display adapter 运算的能力increasingly important.
Some early 3D operation is to operate the CPU, but the CPU is not for the graphics card "service tool", the usual CPU is very busy,
so then, display adapter vendor to embed a 3D acceleration chip directly on the display adapter:
GPU (Graphics Processing Unit): graphics processor, also known as the graphics core / chip, a microprocessor,
GPU graphics card to reduce the dependence on the CPU, and the work of some of the original CPU, which is the GPU was designed purpose .
The display adapter is mainly through communication with the control chip CPU, a main memory of the CPU. For 3D games, display adapters also requires 高速运算a component,
so that the transmission data is the sooner the better, so the display specification from the early adapter PCI to AGP, AGP bandwidth to and from PCI-Express standard, the data transmission to the greater:
we see the figure above PCIE 1.0 version of the display adapter already fast, but there are in fact PCIE 2.0, PCIE 3.0, the version PCIE 4.0.
Memory computing on image resolution:
Interface display adapter
Taobao to walk around, look at the current graphics interface specification:
Display adapter interface type described in the book there are four:
- VGA (D-sub): earlier interface, 15-pin male, only the transmission image, has been eliminated.
- DVI: There are two kinds of sub-categories, namely DVI-d and DVI-i, the common DVI-d on the market, only the transmission of the image, it is generally used to connect the LCD screen.
- HDMI: can simultaneously transmit images and audio! So it is widely used in television, the computer also supports most of the HDMI interface.
- Display Port: Like with HDMI can transmit images and audio at the same time! Interface rarely used.
Colorful graphics images continue to be an example, in the figure from left to right DP（Display Port）接口, HDMI接口, DVI-d接口:
