Motherboard whine
The CPU of the notebook is i5 11300h, the 11th generation Core processor, no independent graphics card, thin and light.
Since I bought it, there have been current sounds and buzzing sounds. The current sound and the resonance sound of the motherboard coexist, which is especially annoying in the dead of night.
After disassembling the notebook, it was found that the sound mainly came from a few inductors under the radiator. I bought 704 glue from the Internet and applied it to the bottom of the inductor, but it didn't work.
I found intel c-state/intel c states from the Internet (the name of different computers is different, it is an energy-saving technology owned by Intel CPU), this function is enabled by default in the main version of BIOS, and it will change the current of CPU power supply after it is turned on. As a result, the resonance between the inductor and the motherboard is caused, and abnormal noise is generated.
So in the motherboard BIOS, find the CPU adjustment option and turn off the intel c-state option.
Afterwards, the current and hissing sounds of the computer all disappeared, and no sound could be heard when the ear was attached to the notebook. The problem that had been bothering me for a long time was finally solved! ! ! Author: Niuvip https://www.bilibili.com/read/cv17169414 Source: bilibili