![]() Figure 3 shows a simulation of convective and non-convective cooling.įigure 3: Some thermal simulations What is the purpose of thermal paste? For this purpose, there must be a minimum thermal resistance between the CPU and the heat sink. ![]() The objective is to dissipate the CPU heat and transfer it to the surrounding air through the metal heat sink. There are also products with liquid metal that have higher thermal conductivity.įigure 2: The paste reduces the thermal resistance and fills the micro imperfections What is thermal paste made of? Thermal paste is created with zinc oxide and silicone. Its use is necessary on CPUs since they are very inefficient components and dissipate a lot of energy in unused heat. Thermal paste is a dense compound material used to improve thermal contact between electronic components and heat sinks (figure 2). The deficiencies were deliberately portrayed in a larger size to give the idea. The two surfaces are not perfectly smooth as the microscopic imperfections contain air (blue colored bubbles), which prevent the heat from going outside. Since air is a bad heat conductor, the CPU does not chill properly.įigure 1: Air particles present in the imperfections of the contact surfaces prevent the CPU from cooling properlyįigure 1a shows a perfect and ideal adhesion of the two contact surfaces (CPU and heat sink). The thermal paste has the function of filling the microscopic imperfections of the surfaces in contact, which inevitably retain the air particles (see figure 1). There are many viable and cheap, easy to find substitutes, to solve the problem. If you don’t have thermal paste available, you shouldn’t despair. Which would limit the passage of heat, even if the two parts are in close contact. Without the thermal paste, air bubbles would form. What does thermal paste do? The function of thermal paste is to help the CPU (or other chips) transferring heat to the heat sink. Often, those who assemble computers forget to use it and apply the heat sink directly to the CPU. Thermal paste has vital importance, even if many people do not realize how useful it is. ![]() In this article, we will see how to usefully replace the thermal paste with some different, available, and inexpensive material. It is a fundamental component because it helps to cool the CPU temperature down, lowering the thermal resistance between the microprocessor and the heat sink. Very often, assemblers and computer repairers do not have thermal paste available. However, when the unexpected happens, there are available substitutes, which will hold the fort. This underlines the importance of this repair tool and why there must be adequate supply to enhance their work. ![]() CPU thermal paste is to assemblers and computer repairers, what the thread is to the fashion designer. ![]()
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