Introduction
Thermal compound is also known as thermal paste, thermal grease and heat sink compound. It is a compound applied between heat generating equipment such as CPUs and processors and in their sinks. The basic purpose of thermal compounds is to fill the microscopic gaps or to create a barrier for efficient transfer of the heat. It is also used for ensuring optimal heat dissipation in this equipment. The process of thermal management is crucial because even a slight increase in temperature can lead to reduction of lifespan of the electrical components or can affect their performances. Thus, it is important to choose the right thermal paste to maintain temperatures in high-performance applications such as gaming PCs workstations and industrial machinery. Thermal stress occurring in those applications can lead to system failure as well.
Key Factors to Be Considered While Choosing the Correct Thermal Paste
There are few key factors that need to be considered while choosing the right thermal compound to guarantee optimal performance. These factors play an important role in various applications such as building high-end gaming rigs and maintaining industrial equipment. Below stated are those key factors that can be helpful in choosing the right thermal paste:
- Thermal Conductivity (W/mK): Thermal conductivity is measured in Watts per meter-Kelvin. It assesses the ability of the paste to transfer heat. The paster with higher W/mK rating possesses greater capacity to conduct heat and results in lower operating temperatures and improvement in system stability even under heavy loads. In the industrial settings, components tend to work under continuous stress and require a high W/mk rating to maintain consistency in the performance.
- Viscosity and Application Ease: The ability of any fluid’s resistance to flow is called viscosity. In terms of thermal paste, viscosity determines the ability of compounds to spread across the surface. Pastes with lower viscosity flows easily and are easy to apply. Thus, they are also considered ideal for new users of thermal paste applications. On other hand, higher viscosity pastes are more difficult to spread evenly but they tend to provide long-term thermal stability and resistance to pump-out. Thus, they are considered suitable options for professionals seeking sustainable performances.
- Curing Time and Longevity: It is also important to consider the curing time while choosing the thermal paste. Some pastes offer peaked performance and are considered ideal for quick testing whereas some pastes require a certain curing period for stability. Also, longevity means the lifespan of the paste is an essential factor. The characteristics of the paste should match one’s application’s requirements for deriving optimal results. For example, in critical systems, a long-lasting and stable thermal paste tends to reduce the maintenance cost and downtime.
- Electrical Conductivity and Safety: Certain thermal pastes with liquid material varieties have excellent electrical conductivity and offer superior thermal transfer. However, this conductivity can be a potential risk if not applied precisely. Pastes, with excellent electrical conductivity are suitable for experienced users whereas for new users or in scenarios where safety is a necessity, non-conductive pastes are more recommendable.
- Compatibility with CPU/GPU/Other Components: It is important to match the compatibility between the thermal pastes and the components. There are high chances for certain pastes such as liquid metal compounds to react negatively with specific materials. For example, use of aluminum in heat sinks can result in to corrosion when contacted with a liquid metal. Thus, for this purpose standard pastes, formulated with silicone or silicone are considered better options. Thus, it is important to review the specific characteristics of both the processors and chosen thermal paste to avoid potential damages.
- Price VS Performance: The cost of thermal compounds tends to vary significantly. The high-end options offer best thermal performance making it quite expensive. However, it is important for the users to determine whether an extreme level of performance is required for their application. If not, there are certain affordable pastes available in the market that possess excellent heat transferring capacity and can be proven a wise investment for the users.
Safety Tips to Consider While Handling Thermal Pastes
Below stated are few essential safety tips that should be followed while working with thermal pastes:
- Wear Gloves: It is advisable to wear nitrile or latex gloves while working with thermal pastes to prevent the skin and avoid potential irritation.
- Cleaning of CPUs and Heat Sink Surfaces: It is essential to clean the CPUs and heat sink surfaces using isopropyl alcohol and a lint-free cloth. The surfaces should be free from debris. A clean surface can allow the thermal contact to deliver best possible results.
- Avoid Applying in Excess Quantity: The thermal paste should be applied in a small, pea-sized quantity. Even a thin layer of thermal paste is enough for optimal heat transfer. If it is used in excess quantity, it can ooze out and lead to potential damages.
- Keep Thermal Pastes Away from Motherboard Components: Though thermal compounds are excellent electrical conductors and excel in heat transfer, the same properties can also lead to short circuits if the thermal compounds are contacted with sensitive motherboard components.
Take Away
This is the brief explanation about thermal pastes, factors to be considered while choosing them and few safety tips while applying them on the components. We hope this information will be effective for you. Please let us know through your valuable feedback and the suggestion in the drop box.