Thermal paste application

Thermal paste is essential for heat dissipation between CPU and cooler, preventing overheating and ensuring stable performance.

About this subject

Thermal paste is a compound applied between the processor (CPU or GPU) and the heat sink (cooler). Its main function is to fill micro-imperfections on the contact surfaces, eliminating air pockets that act as thermal insulators. Composed of materials such as ceramic, metal, or silicone, the paste improves thermal conductivity, measured in W/mK. The higher this value, the more efficient the heat transfer.

In computer assembly, correct application is crucial. Without thermal paste, the processor can reach temperatures above 100°C, triggering thermal throttling (forced performance reduction) or even permanent damage. For average users, ceramic or silicone pastes are sufficient. Overclocking enthusiasts prefer metallic or liquid metal pastes, which offer superior conductivity but require caution due to electrical conductivity.

The most recommended application method is the pea-sized dot: a small drop in the center of the CPU. The cooler pressure spreads the paste evenly. Other methods include spreading manually or making an X shape, but these may introduce air bubbles. The ideal amount is about the size of a pea; excess can leak and cause damage, while too little leaves uncovered spots.

In the global market, brands like Arctic MX-4, Cooler Master MasterGel, and Thermal Grizzly Kryonaut are popular. Thermal paste has a shelf life; over time, it dries out and loses efficiency. It is recommended to replace it every one to two years, especially if the computer is disassembled for cleaning. In high-performance systems, periodic replacement keeps temperatures low and extends component lifespan.

Frequently Asked Questions

How much thermal paste should I apply?

A pea-sized or grain-of-rice amount in the center of the CPU is sufficient. The cooler pressure spreads it evenly.

How to tell if thermal paste is dry?

If CPU temperatures are higher than normal under load, it may be a sign of dried paste. Visually, it becomes crumbly or powdery.

Is conductive thermal paste dangerous?

Liquid metal pastes are electrically conductive and can cause shorts if they spill. They require careful application, preferably on delidded CPUs.