The CPU is the computing and control core of the computer, so most computer manufacturers attach great importance to the protection of the CPU, and a thin layer of thermal grease will be applied to the surface of the CPU. For those who don’t know the role of CPU thermal grease, it is inevitable to wonder why it is necessary to apply thermal grease on a layer of clean CPU hardware? What is the effect if thermal grease is not applied?
To know the impact of not applying thermal grease on the CPU, you must first understand the working nature of the CPU. The CPU will generate a lot of heat when operating data. If the heat of the CPU itself cannot be discharged in time, it will cause the CPU temperature to rise. High, the higher the CPU temperature, the worse the performance of the computer. When the CPU temperature reaches a certain limit, it will run at a reduced frequency. The reason for reducing the main frequency is to control the temperature to continue to rise. In this state, the performance of the computer is extremely poor, that is, the computer Running very stuck. If the temperature of the CPU is still not effectively controlled after the frequency reduction, the CPU self-protection device program will be triggered, and the CPU will directly “operate” the computer’s blue disk or automatically shut down, and sometimes the CPU will be directly burned.
After the CPU is coated with thermal grease, the heat emitted by the CPU will be transferred to the radiator base through the principle of heat transfer, and then the radiator can cool the CPU in time. In addition to basic thermal conductivity, good-quality thermal grease also has good insulation, dust-proof, shock-proof performance, and does not corrode electronic components.
Therefore, the CPU does not apply thermal grease, and when it is repaired, reworked, or even scrapped, the cost of loss is much higher than the cost of using thermal grease.
After we understand the impact of not applying thermal grease on the CPU, are we also interested in how to apply thermal grease to the CPU? Next, let’s take a look at the application method and operation process of CPU thermal grease.
The first step of applying thermal grease – remove coating impurities
Before applying thermal grease, you should first ensure that the coating is smooth, check whether there are impurities, dust, etc. on the surface, and also check whether there is rust on the surface of the coating, so as not to affect the next operation. In addition, if the coating layer has rust spots, etc., it will also lead to insufficient application of thermal grease, thereby reducing the service life of thermal grease. Therefore, removing impurities and ensuring a smooth coating is a simple but essential step.
The second step of applying thermal grease – evenly spread
After ensuring that the coating is smooth, the next step is the most important application. When applying thermal grease, you can first place a small amount of thermal grease on the coating layer, and then scrape it evenly with a scraper. Here, methods such as “scratching with a word”, “scraping with a cross”, etc. can be used, in order to make the thermal conductive silicone grease placed on the coating layer uniform and thin. After applying the thermal grease, observe whether there are air bubbles on the surface. The places with air bubbles need to be smoothed with a scraper.
Take the application of CPU thermal grease as an example:
- Put a small amount of thermal conductive silicone grease in the center of the CPU shell. The container of silicone grease is not necessarily a needle tube, but also a vial. You can pick a small amount of silicone grease with a toothpick and place it in the same position.
- Scrape the silicone grease with a small cardboard or plastic sheet, so that the silicone grease is evenly spread on the cpu shell and spread out into a thin layer.
- After spreading evenly, it is faintly visible that the metal casing of the CPU is under a thin layer of silicone grease. It is not easy to apply too thick silicone grease, because its thermal conductivity is not as high as that of metal, and it should not overflow the edge of the CPU case.
In addition to the above method, you can also put a few drops in the middle of the CPU and squeeze it evenly through the pressure of the heat sink. This method is more convenient, but there may be a local lack of glue, so pay more attention when operating.
The purpose of applying thermal grease is to have no impurities and evenly apply it. As long as this is achieved, the heat dissipation performance of electronic components can be basically guaranteed. There is no special regulation on what method to apply, just ensure that the coating layer is smooth. At the same time, applying thermal grease is a “fine job”, so don’t be impatient, lest improper filling will cause damage to the coating and affect the efficacy and function of the product.