The main reason for all loud fans is the dust accumulation which block the air passage and force fans to run faster. Carefully open up your computer case or laptop, pick up a case of compressed air, and spray the fans, vents, and heat sinks clean. Dust cleaning should be done in regular months; you will notice a significant reduction in noise and much better cooling.

Properly Fix and Connect Fans

The noisy fan could be simply misshaped or loosely connected. Switch off your machine and inspect each fan. Make sure that it is properly positioned in the mount and that its screws or clip is tight. A wobbly fan blade is vibrating and makes an annoying humming sound; this can be rectified easily just with the right reseating.

Change Fan Speeds by Using BIOS or Software Utilities

Most new BIOS features allow some control over fan speed and dedicated software for adjusting this function on modern PCs. Some non-critical fans can be reduced in their maximum RPM without any performance impact, thus making much less noise during regular operation. Using tools like MSI Afterburner, SpeedFan, or the native software of the motherboard can allow users to apply a fan curve for quieter operation at light loads.

Install New Low-Noise Fans to Old or Worn-Out Fans

Old fans become problematic with time, usually developing noise as the inner parts wear down. Usually, switching to a premium quiet fan that is designed to operate in the low decibel range is an excellent option. The ideal choice of models comes with fluid dynamic bearings or magnetic levitation technology as these work with less friction and keep vibration to a minimum, thereby making a definitely quieter PC.

Make Sure There Is No Overheating by Heavy Loads in Your Computer

The higher speed of the fans is caused by the increased temperature of the CPU or GPU. During extremely loaded states, the temperature can be obtained using monitoring utilities, such as HW Monitor or Core Temp. If your PC is overheated, it could mean improperly applied thermal paste, blocked airways, or simply insufficient cooling. Resolving these heat issues is often going to cause a decrease in fan noise while keeping your system safe.

Consider External Sound-Proof Measures Around Your Environment

Even with the fan running optimally, ambient noise could amplify the fan sounds. The PC can be placed on a soft mat, a few feet away from walls, and sound-dampening foam can be inserted within a case. Headphones or white noise can mask minor fan sounds within home office settings as well.

Following these six strategies—dusting it up, fan securing, speed adjustment, old component changing, temperature handling, and ambient noise reduction—will put one in the right direction towards making a huge improvement in quieting your computer fan. These are all pretty inexpensive and relatively easy to accomplish; many prevent unnecessary trips to tech support. Providing your own control over the cooling of your PC ensures that your computing experience will be quieter and more comfortable without putting a dent in performance.
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News Source: Pcmag.com