When the GPU is working hard, it will produce a lot of heat. This heat needs to be dissipated efficiently for optimal performance. The most common way of doing this is through thermal paste, a high-conductivity substance that’s applied between the GPU chip and the heatsink. This fills in the microscopic gaps and imperfections between these two surfaces, thereby enhancing heat transfer.
Depending on your system and budget, you can choose from a wide range of thermal pastes. These include silicone-based pastes that are cheaper and suitable for most users, as well as metal-based options for enthusiasts who want top-tier cooling performance.
Before applying any new paste, make sure that the GPU chip (the main metal block in the middle of the card) and the heatsink base are clean and dry. You can do this by using a can of compressed air to blow away any dust, or by adding isopropyl alcohol to your lint-free wipe/cloth/paper towel and wiping away the existing paste.
After you’ve done this, allow the surface to dry thoroughly. This will ensure that no moisture gets in the way of good heat transfer later on.
Once everything is dry, it’s time to apply the new thermal paste. Start by squeezing out a small amount of paste into your preferred applicator, and then carefully apply it to the center of the GPU die. Spread it evenly, and then visually inspect the area to make sure there are no areas with too much or too little paste.