The types of graphics card interfaces are:

1, VGA interface.

2, DVI interface.

3, S-Video interface.

4, HDMI interface.

5, DisplayPort interface.

6, PCI interface.

7, AGP interface.

8, PCI Express interface.

9, AGI and AGU interface.

DisplayPort is a high-definition digital display interface standard, DisplayPort was introduced at the beginning of the bandwidth it can provide as high as 10.8Gb/s.

DisplayPort can support WQXGA + (2560 × 1600), QXGA (2048 × 1536) and other resolutions and 30 /


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There are 3 rows of 15-pin signaling wires in the D-SUB connector***. It carries an analog signal - transmitting signals of different voltages to control the display of images.

Video cards deal with digital signals, and to output them, a component called a "RAMDAC" (Video Memory Digital to Analog Converter) is integrated into the display core.

It will be processed by the display core and stored in the video memory of the digital display signal frame-by-frame converted to three color brightness and line, frame synchronization signals **** with the composition of the analog video signal, 15-pin D-type D-SUB interface due to the limitations of the bandwidth, the display of the resolution is greater, the image quality is also relatively poor.

Baidu Encyclopedia - Graphics Card Interfaces