Location of video card cooling fan
The big board with a red circle on the motherboard is the graphics card, and the GPU core chip on the graphics card needs heat dissipation. The noise you're talking about is the sound caused by lack of oil and wear of cooling fan.
Replace the cooling fan.
The cooling fan of the graphics card can be replaced. Unplug the power cord of the fan and take off the fan. You can buy fans of the same size and power in the computer accessories store.
Inject lubricating oil
In addition, by opening the trademark label of the fan, we can see that adding a few drops of grease and lubricating oil (motorcycle and automobile oil) can improve the bearing. If you are not familiar with the operation, you can ask a knowledgeable friend for help.