2. Remove the CPU fan channel fixing screws and carefully open the CPU heat sink. You will find that the silicone in the gap between the CPU and the heat sink has already dried (it has a lot to do with the high power of the CPU). Use a slightly Wet clean patch with clean dry silicone and let dry. 3. If conditions permit, you can use high-grade silicone to patch it up. If conditions do not, use the following method: Squeeze a little of the purchased or white ordinary silicone ester onto the glass piece, and use a carbon pencil to rub it on the glass while stirring until it The white silicone turns light gray and becomes slightly thicker. Use a blade to apply a thin layer on the clean CPU to install the heat sink. Remember not to move the heat sink back and forth to ensure good contact between the heat sink and the CPU. . - The silicone produced by this method has little difference from Intel's special silicone after testing. It has good thermal conductivity and is not easy to dry. 4. Carefully insert the large fan, and carefully lift off the round sticker with the trademark in the center of the fan. You can see that the central axis in the center is exposed. Apply Vaseline (very cheap, available in pharmacies) carefully. Just seal it with a round sticker with the trademark. - Principle: Vaseline is mostly used to smear hands to prevent dry and cracked skin in winter. It has a characteristic: when the fan is working, it will generate heat, and the Vaseline will gradually melt and penetrate into the fan bearings for lubrication. When the fan is turned off and stops working, the temperature will drop. After coming down, the Vaseline will solidify and standby. This method is more effective than adding any lubricant. 5. Install the chassis and put slightly thicker rubber skin on the front and rear of the chassis for shock absorption. 6. Turn on the computer and give it a try. It won’t be too obvious at first, but after using it for about a week, you will find that the noise of your computer fan and chassis is getting smaller and quieter, and it is basically the same as when you bought it. 2) Expert analysis: The longer the computer is used, and the host is moved by some people, or the internal hard drive, fan and other components continue to run and rotate, sometimes the screws will become slightly loose, causing the vibration to intensify and the noise to become louder. In addition, if it is used for too long, the rotating shaft of the fan will become increasingly dry, and the rotational noise will increase due to lack of lubrication. Take action quickly: For this small problem, if computer users who have not expired the warranty period do not want to break the warranty seal by opening the case, they can just send the host to a repair station and let the manufacturer perform maintenance for you. If you are a computer user or the host has already expired the warranty period, then you need to open the case, tighten all the visible screws, add one or two drops of lubricating oil to the rotating shaft of the fan, and remove dust from the case by the way. Your host The noise will be reduced a lot. 3) The main sources of computer noise are as follows: Hard drive, power supply, fan, CPU fan, graphics card fan, motherboard device. The main vibration sound comes from vibration. Only vibration can produce sound. The huge noise of the host when the computer starts is undoubtedly caused by the host. Some internal components are vibrating strongly. A big factor is that the power supply fan and CPU fan rotate when the computer starts. There are many reasons for the harsh startup noise, but the main reasons are nothing more than the following: Vibration phenomenon caused by the fan: a. The natural frequency of the system composed of the chassis structure, power box installation structure, etc. When the fan speed is lower (that is, the rigidity of the structure is poor), the speed gradually increases. When the speed is close to the natural frequency of the system, it begins to exhibit the vibration phenomenon. As the fan speed increases, it becomes closer and closer to the natural frequency of the system, and the vibration The vibration becomes more severe when the fan speed is the same as the natural frequency of the system. As the fan speed continues to increase, the fan speed gradually moves away from the natural frequency of the system, and the vibration gradually weakens and returns to normal. b. The fan blades are "eccentric": A high-quality fan has the center of gravity of the blades on the axis and runs very smoothly with very little noise. However, an inferior fan will have a certain deviation and the center of gravity of the fan blades is not on the axis. The "eccentricity" is caused on the axis. When such a fan rotates, it is equivalent to an oscillator (the oscillator is an eccentric wheel added to the motor shaft). As the use time increases, the fan bearings gradually wear out, or If the fan's heat sink is not firmly installed or loose, it will intensify the vibration and make the noise louder.

It may also be due to the poor quality of the fan and poor lubrication. It spins very stiffly when it is started. When it comes to life, the lubricant inside softens and the sound becomes quieter. c. The chassis structure is not tight: the hard disk and the chassis bracket are not in close contact. Or the steel plate of the chassis is too thin, which easily makes some annoying noises. The noise caused by the power supply fan may be caused by the loose matching between the chassis and the power supply. The rotation of the power supply fan causes the chassis to vibrate. In addition, the unstable installation of other hardware inside the chassis can also cause vibration. The weather is cold and the temperature is low: Some fans use grease. When the temperature is low in winter, the grease in the fan solidifies. When the fan is just started, the temperature of the fan bearing is low, the viscosity of the grease is high, the rotation resistance is high, and the sound is loud. If it is too big, the temperature of the fan bearing will rise after turning for a while, and the lubricating oil will start to work. At this time, the noise at startup will return to normal. This usually occurs within the first few minutes of booting up. In this case the noise will not occur in other seasons. The fan bearing is short of oil: If the sound is loud all the time, it means the fan needs oil. There is a circular sticker in the center of the bottom of the fan. When you peel it off, you can see the internal rotating shaft of the fan. Dip a toothpick in some sewing machine oil (about the size of a grain of rice) and add it in. Then put the sticker on. Including CPU fans, graphics card fans, and power supply fans can all be refueled. If you don’t know how to refuel, you can go to a computer repair shop and let professionals do it.