Why does the CPU usage be high, but the screeching sound in the chassis continues?

You'd better take the case apart and see exactly where the sound is coming from.

There are several possibilities.

1. There is a problem with the CPU fan. Nowadays, the average fan is self-adjusting. When the CPU usage is high, the fan speed will be accelerated. In the case of a problem, noise will be emitted.

Second, there is a problem with the graphics card fan, and the reason is the same. When a large number of graphics cards are needed, the fans of the graphics cards also need to be accelerated. The fan in question will likewise make noise.

3. Power supply fan. When the CPU usage is high, the power output of the power supply increases, and the fan will spin faster. The fan noise in question is annoying.

Fourth, the above 3 fans are all possible, that is, there are other items close to the fan blades, and the high-speed rotating fan blades collide with the item to make noise.

5. Some motherboards will protect themselves, when the temperature is too high, or the voltage is too high, the current is too strong, etc., there will be an alarm sound. Once it is overloaded, the power will be cut off, and this is when the computer will lose power.

Sixth, hard disks are also possible. If it is a hard disk, you can consider formatting the C drive and reinstalling the system. If there is still noise, you can try it with Efficiency Source Hard Drive Repair software. If you can't do it, just change the hard drive.

Suggestion: Disassemble the case, clean the internal dust with a brush, absolutely not use water, if possible, consider cleaning with banana water or professional motherboard cleaner. Check the arrangement of the lower wires, organize the lower lines, and avoid contact between the wires and the fans.

It may be that the high temperature alarm function is set. When the CPU usage is too high, the temperature is high, and if the critical temperature set by the BIOS is reached, it will be alarmed. If it is exceeded, it will be shut down directly.

That is, the frequency of reading and writing of your hard disk is too high, use general optimization software, such as Windows Optimization Master, to clean up disk junk files and defragmentation, it should be able to solve, if there is still this kind of problem, the possibility of viruses will be greatly increased, use antivirus software to check and kill.

The hard disk is too loud, it's been used for a long time, clean up the disk garbage, see if there are any bad sectors, and block out the bad ones.

This noise is generally caused by the internal fans of the host, including the power supply, CPU, and graphics card fans, and has nothing to do with the CPU configuration. Because of the long use time, the effectiveness of the lubricant inside the fan decreases, and there is more dust, the running speed of the fan decreases, and the friction increases. If the noise resonates with the chassis frame, not only the loud noise but the entire chassis will vibrate.

In addition, it is not excluded that the internal screws inside the chassis may loosen and cause noise, and there will also be noise when the mechanical hard disk is read and written.

Treatment suggestion: After a period of use, the lubricant inside the fan gradually recovers due to friction and heat, and the sound is reduced accordingly. If you don't see improvement, here's what you can do:

1. Use leather tigers, soft brushes, etc. to dust and lubricate the fan inside the case, or directly replace the new fan.

2. Tighten the screws on each part of the chassis.

3. If the mechanical hard disk is noisy, it can be replaced with a new hard disk or solid state drive.