Laptop overheating is one of the most common problems that users encounter after 2-3 years of use. Even powerful gaming models ASUS ROG, MSI GT Series or budget Lenovo IdeaPad start to “slow down”, suddenly turn off or make loud cooler noise. In 80% of cases, the culprit is dried out thermal paste, which has lost its thermal conductivity properties. Replacing it can restore the device to its previous performance, reduce the processor temperature by 15–25°C and extend the life of components.

But how to properly change thermal paste yourself without damaging your laptop? In this article we will analyze the entire process from A to Z: from the choice of material (compare Arctic MX-6, Noctua NT-H2 And Thermal Grizzly Kryonaut) before testing the result in AIDA64 or HWMonitor. You will learn what tools you will need, how to avoid common mistakes (for example, overtightening the radiator fasteners) and what to do if the temperature does not drop after replacement. And for owners of laptops with soldered chips (as in MacBook Pro or Dell XPS) we have prepared separate recommendations.

Why thermal paste loses its properties and when to change it

Thermal paste is a viscous substance based on silicone, metal particles or carbon nanostructures that fills microscopic irregularities between the processor cover (IHS) and the surface of the radiator. Over time it dries out due to:

  • 🔥 Thermal aging — when heated above 80°C, the silicone base begins to decompose and the additives oxidize. On average, the lifespan of high-quality paste is 2–3 years, and that of budget paste is 1–1.5 years.
  • ⚡ Electrical discharges — in cheap pastes, metal particles can form microbridges, which accelerates degradation.
  • 💨 Vibrations and mechanical stress — when transporting a laptop, the paste may “drip” from the center of the crystal, leaving voids.
  • 🧴 Low quality source material - many manufacturers (for example, HP or Acer) save money by applying cheap paste in a thick layer at the factory.

You can determine when it’s time to change the thermal paste based on the following signs:

Symptom CPU temperature (under load) Probable Cause
Laptop suddenly turns off 95°C and above Critical overheating due to lack of heat transfer
Loud operation of the cooler on simple tasks 75–85°C The paste has dried out, the radiator does not dissipate heat
Throttling (reducing processor frequency) 85–95°C Overheat protection mechanism
Hot housing in the keyboard area 70–80°C Heat does not escape through the radiator, it heats the box

⚠️ Attention: If your laptop is a model with soldered processor (For example, Apple M1/M2, Intel 12–13 generation in ultrabooks), replacing thermal paste may not be possible without specialized equipment. In such cases, all that remains is to clean the cooling system or replace thermal pads.

📊 How often do you check your laptop's temperature?
  • Never
  • Once every few months
  • Only when the lags start
  • After each cleaning

Which thermal paste to choose: comparison of 7 popular options

The thermal interface market is huge, but not all pastes are suitable for laptops. Main selection criteria:

  • 📉 Thermal conductivity - minimum 8–10 W/mK for modern processors (Intel Core i7/i9, AMD Ryzen 7/9).
  • ⏳ Service life - from 3 years for silicone-based pastes, up to 5–8 years for liquid metal ones.
  • 🔧 Ease of application — the paste should not be too thick or thin.
  • ⚡ Electrical conductivity — for beginners it is better to take dielectric pastes (without metal particles).

The table below compares popular thermal pastes by key parameters (data for 2026):

Model Thermal conductivity (W/mK) Service life Electrical conductivity Price (per 1 g) Better for
Thermal Grizzly Kryonaut 12.5 3–4 years No ~500 rub. Gaming laptops, overclocking
Noctua NT-H2 8.9 5+ years No ~300 rub. Long term use
Arctic MX-6 11.0 8 years No ~250 rub. Budget option with a long term
Coollaboratory Liquid Ultra 38.4 10+ years Yes (liquid metal!) ~1200 rub. Extreme Cooling (requires experience)
DeepCool Z9 11.2 4 years No ~200 rub. Budget laptops

💡 Advice: For most laptops, the best choice is Arctic MX-6 or Noctua NT-H2. They do not conduct current, are easy to apply and last a long time. Liquid metal pastes (Coollaboratory, Thermal Grizzly Conductonaut) give the best result, but require caution: if they come into contact with the motherboard contacts, they can cause a short circuit.

💡

Before buying, check whether the paste is fake: original Thermal Grizzly And Noctua sold in sealed syringes with protective holograms.

Preparing for replacement: tools and disassembling the laptop

Before you begin, make sure you have everything you need. Minimum set of tools:

  • ⚒️ Screwdriver set - cross (PH00, PH0) and flat for plastic latches.
  • 🧲 Magnetic mat or tray - so as not to lose screws (in laptops there can be 20+ pieces!).
  • 🧴 Isopropyl alcohol (90%+) - for cleaning old paste.
  • 🧻 Lint-free wipes or coffee filters - so as not to leave fibers.
  • 🔍 Magnifying glass or flashlight - for inspection of small parts.
  • 💳 Plastic card or mediator - for carefully prying the latches.

⚠️ Attention: If your laptop is under warranty, disassembling it yourself will void it! Some brands (for example, Apple or Dell) even the removal of the back cover is fixed by software. Check this in the service menu (BIOS) or using the utility HWiNFO.

Step by step disassembly:

  1. Turn off the laptop, unplug the charger and remove the battery (if it is removable). If the battery is soldered in, work with the power turned off and the power button held down for 10–15 seconds (capacitor discharge).

  2. Turn the laptop over and remove all the screws on the back cover. Please note: some screws may be hidden under feet or stickers!

  3. Carefully pry the lid open with a plastic card, starting from the corner. Modern laptops often use latches - do not use excessive force to avoid breaking them.

  4. Take photographs of the location of all cables and modules (especially Wi-Fi, SSD, keyboard cables). This will help put everything back together without errors.

  5. Disconnect the battery (if it is connected by a cable) and unscrew the radiator. Be careful: there may be heat pipes attached to it - do not bend them!

The power is turned off and the battery is removed|Photos are taken of the inside of the laptop|A place for the screws is prepared (magnetic mat)|Compatibility of the thermal paste with the processor is checked|Drivers are downloaded in case of BIOS reset-->

🔧 Disassembly features of popular models:

  • Lenovo Legion — the radiator is attached to the motherboard with 6–8 screws, thermal pads are on the memory chips.
  • ASUS TUF/ROG — a two-section radiator is often used; care is required when disconnecting heat pipes.
  • MacBook Pro (2018–2023) — the processor is soldered, replacing thermal paste is impossible without re-soldering.
  • Acer Predator — the radiator screws may be under seals (guarantee!).

Removing old thermal paste and cleaning surfaces

This is the most critical stage: if even microscopic particles of the old paste are left, the new one will lie unevenly and heat transfer will deteriorate. Never use for cleaning:

  • 🧼 Soap or household chemicals - they leave a film.
  • 🧻 Cotton pads - lint may remain on the board.
  • 🔪 Metal scrapers risk scratching the processor cover.

Correct cleaning algorithm:

  1. Apply a few drops isopropyl alcohol (90%+) on old pasta. Wait 10-15 seconds - it will soften.

  2. Gently wipe off the paste coffee filter or microfiber cloth. Movements should be circular, without pressure.

  3. Repeat the process 2-3 times until the surface is perfectly clean. Check at an angle - there should be no streaks.

  4. Wipe the surface of the heatsink and processor dry cloth and let dry for 2-3 minutes.

⚠️ Attention: If on the processor cover (IHS) there are traces thermal pads (gray or black spots), they also need to be removed! Use plastic scraper (for example, from an old bank card) and alcohol. Do not confuse pads with paste - they perform different functions!

What to do if paste gets on the motherboard?

If thermal paste (especially liquid metal) gets on the contacts or components of the board:

1. Turn off the power immediately.

2. Gently remove the paste with a cotton swab dipped in alcohol.

3. Check with a multimeter that there is no short circuit between the contacts.

4. Allow the board to dry for 12-24 hours before turning it on.

If the paste gets under the microcircuits (for example, VRM), it is better to contact the service.

Applying new thermal paste: technique and mistakes

Here, many make critical mistakes that ruin all the work. Basic rules:

  • 🎨 Paste quantity - enough peas with a diameter of 4–5 mm (for laptops). Excess will lead to extrusion onto the board.
  • 🔄 Application technique - do not smear the paste! It will be evenly distributed when tightening the radiator.
  • 🌡️ Ambient temperature - Apply the paste at room temperature (20–25°C), otherwise it may thicken too quickly.

Step by step instructions:

  1. Take a syringe with paste and squeeze out a pea to the center of the processor cover. For Intel - closer to the edge (the hottest zones are located there), for AMD - strictly in the center.

  2. If the paste is thick (for example, Noctua NT-H2), smear it slightly silicone spatula (come with some pastes).

  3. Reinstall the radiator and tighten the screws crosswiseso that the pressure is distributed evenly. Don't overtighten! The optimal force is 0.6–0.8 Nm (use a torque screwdriver if available).

  4. Connect all cables and reassemble the laptop in reverse order.

📌 Typical mistakes and their consequences:

Error Consequences How to fix
Too much pasta Extrusion onto the board, risk of short circuit Remove excess with alcohol and reapply
The paste is applied off-center Uneven heat dissipation, local overheating Rework, maintaining alignment
Radiator not tightened evenly Curvature of the processor cover, poor contact Loosen the screws and tighten them crosswise
Expired paste used Low thermal conductivity, rapid degradation Replace with a fresh one
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Liquid metal pastes (Coollaboratory, Thermal Grizzly Conductonaut) require mandatory coating of surrounding components insulating tape (For example, Kapton tape) to avoid short circuits!

Testing the result: how to check the effectiveness of the replacement

After assembling the laptop, you need to make sure that the paste replacement was successful. To do this:

  1. Turn on the laptop and check that it loads without errors. If the message appears CPU Fan Error or Thermal ThrottlingThe radiator may not be installed correctly.

  2. Install temperature monitoring programs: AIDA64, HWMonitor or Core Temp.

  3. Run stress test (For example, Prime95 or Cinebench R23) for 10–15 minutes and record the maximum temperatures.

📊 Normal temperatures after replacing paste:

  • 🖥️ Office tasks (browser, documents) - 40–55°C.
  • 🎮 Games (Cyberpunk 2077, GTA V) — 70–85°C.
  • ⚡ Stress test — up to 90°C (but without throttling!).

If temperatures have not changed or increased, possible reasons:

  • 🔄 The paste was applied incorrectly (too little/too much).
  • 🔧 The radiator is not pressed well (check the screws).
  • 💨 The cooler is clogged with dust (needs cleaning).
  • 🔥 Thermal pads on memory/VRM chips are worn out (needs replacement).
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For an objective comparison, record the temperatures to And after replacing paste under the same load (for example, in a game Fortnite at maximum settings).

Common problems after replacing thermal paste and their solutions

Even if you did everything according to the instructions, unexpected difficulties may arise. Let's look at the most common ones:

1. The laptop does not turn on after assembly

  • 🔌 Check your connection battery And power cable.
  • 🔧 Make sure that all heatsink screws are tightened (sometimes the board is not in contact with the case).
  • 💻 Reset BIOS (remove the battery CMOS for 10 minutes).

2. Temperatures increased after replacing the paste

  • 🧴Perhaps pasta poor quality or expired. Try a different brand.
  • 🔄 Check if not skewed whether the radiator. Tighten the screws in a crisscross pattern.
  • 💨 Cleaning the cooler and radiator from dust can have a greater effect than replacing the paste.

3. The paste has squeezed out onto the board.

  • ⚠️ If pasta non-conductive (For example, Arctic MX-6) - carefully remove excess with alcohol.
  • ⚡ If pasta liquid metal — immediately turn off the power and contact service!

⚠️ Attention: If after replacing the paste the laptop starts turn off on its own after 5–10 minutes of work, this is a sign cooling system malfunction (for example, the cooler or heat pipe has failed). In this case, diagnostics are required at a service center.

FAQ: answers to frequently asked questions

Can I use thermal paste from a computer for a laptop?

Yes, but with reservations. PC pastes (for example, Thermal Grizzly Kryonaut) often have higher thermal conductivity, but may be too thick for thin gaps in laptops. The optimal choice is pastes with a viscosity of 200–300 Pa s (indicated on the package).

How often should you change the thermal paste in your laptop?

Depends on the quality of the paste and operating conditions:

  • 💻 Office laptops - once every 3–4 years.
  • 🎮 Gaming laptops - once every 1.5–2 years.
  • 🔥 Laptops in hot climates - annually.

When using liquid metal pastes, the interval increases to 5–8 years.

How can I replace thermal paste in an emergency?

If you urgently need a replacement, but there is no paste, you can temporarily use:

  • 🧴 Toothpaste (not gel!) - for 1–2 days (thermal conductivity ~0.5 W/m K).
  • 🧈 Vaseline - up to a week (1–2 W/m K).
  • 🧊 Melted paraffin - only for aluminum radiators.

⚠️ Warning: These options unacceptable for long term use! They can damage laptop components.

Do I need to change the thermal paste on my laptop's video card?

Yes, if your laptop has discrete video card (NVIDIA GTX/RTX or AMD Radeon). The process is similar, but:

  • Pastes required less (pea 3–4 mm).
  • Often it is necessary to replace and thermal pads on GPU memory chips.
  • Temperatures after replacement should drop by 10–15°C (in games from 85°C to 70–75°C).

In laptops with integrated graphics (For example, Intel Iris Xe) separate replacement of the paste is not required - it is combined with the processor.

Can thermal paste be applied to thermal pads?

No! Thermal pads and thermal paste perform different functions:

  • 🟦 Thermal pads — fill large gaps (1–3 mm) between the radiator and memory/VRM chips.
  • 🟠 Thermal paste - used for microscopic gaps (less than 0.1 mm) between the processor and the radiator.

If the gaskets are dry, they need to be replace for new ones (for example, Arctic Thermal Pad), rather than smearing with paste.