What is the reason why the VGA cable connecting the desktop computer host and the monitor is hot?

What I learned in Bai Ye in shining armor, take it to answer, and hope to adopt it.

The display signal line is hot, mainly depending on whether the part connected to the display is hot or the part connected to the graphics card is hot.

1, the part connected to the display is hot. Because the monitor works for a long time, the main chip on the video board has a high working temperature for a long time, and the heat can not be dissipated quickly under the package of the display shell, which leads to the temperature rise of the whole video board. Therefore, the VGA connector connected to the display terminal generates heat.

2. The connector connecting the host part is hot. When the graphics card chip in the host computer is working, the temperature will be very high, so the general graphics card is equipped with a large heat sink or heat sink+fan. If only the heat sink or cooling fan of the graphics card dies, the temperature of the graphics card is too high, and the heat will be transferred to the VGA line through the interface. At this time, it is very important to check the video card fan to prevent the video card from burning out.