Before you begin: Back up important data if you can, read through the whole guide first, and stop if the repair starts feeling outside your comfort level.
Skill level: Intermediate
Risk level: Moderate (CPU and cooler handling)
Tools needed: Thermal paste, isopropyl alcohol 99%, lint-free cloth, screwdriver
Last reviewed: April 2026
Over your head? No shame in that. Request a repair and I'll take it from here.

Prerequisites

  • High-quality thermal paste
  • CPU/cooler
  • Isopropyl alcohol 99%
  • Lint-free cloth
  • Plastic card (optional)

Removing the CPU Cooler

Before applying new thermal paste, you need to safely remove the existing cooler. The exact process varies depending on your cooler type, so consult your cooler's documentation for specific instructions. Ensure your system is powered off and cooled down before beginning.

Clean the CPU

After removing the cooler, you'll need to remove the old thermal paste. Dampen your lint-free cloth with isopropyl alcohol and gently wipe the CPU surface until all old paste is removed. For stubborn paste, you can use a plastic card at a shallow angle to gently scrape it away, but be careful not to damage the CPU or surrounding components. Once clean, allow the CPU to dry completely.

Apply the Thermal Paste

Apply a small amount of thermal paste to the center of the CPU. A pea-sized amount is typically sufficient for most CPUs. Avoid using metal-containing thermal paste on aluminum coolers, as this can cause corrosion and degradation over time. For optimal thermal transfer, use high-quality thermal paste brands such as Noctua NT-H1, Corsair TM30, or Arctic MX-6.

(Optional) Spread the Paste

Depending on the cooler design, you may need to spread the thermal paste evenly across the CPU surface. Some coolers apply pressure when mounted and will spread the paste automatically. Others benefit from manual spreading using a plastic card or applicator. Consult your cooler's instructions to determine if spreading is recommended.

Install the Cooler

Carefully reinstall the cooler according to its specific mounting instructions. Ensure even pressure across the CPU and secure all mounting mechanisms. Take care not to shift the cooler once it's mounted, as this can disrupt the thermal paste contact.

Final Checks

Once the cooler is installed, power on your system and monitor CPU temperatures to ensure proper thermal contact. Temperatures should stabilize within a few minutes. If temperatures remain higher than expected, you may need to reapply the thermal paste and try again.

Need help instead?

If you would rather hand this off than risk the device or the data on it, request repair and include the guide you were following.

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