Laptop overheating is one of the most common problems that users encounter after 2-3 years of active use. Even top models from ASUS ROG, MSI or Lenovo Legion start to “slow down”, suddenly turn off or make a loud cooler noise when thermal paste dries out and loses its thermal conductivity properties. The service center will charge from 1,500 to 3,000 rubles for a replacement, but you can carry out the procedure yourself - just follow a clear algorithm and avoid typical mistakes.

In this article we will look not only step-by-step instructions for replacing thermal paste, but also the nuances of choosing material (from budget KPX up to premium Thermal Grizzly Kryonaut), signs of wear of old paste, as well as ways to diagnose processor temperature before and after the procedure. We will pay special attention laptops with soldered chips (for example, MacBook Pro or Dell XPS), where a mistake during disassembly can result in costly repairs.

Signs that it's time to change the thermal paste

First signal - temperature increase central processing unit (CPU) and graphics chip (GPU) under load. If previously the laptop heated up to 75–80°C in games, but now it shows 95–100°C and higher, this is a direct reason to look under the lid. Other symptoms:

  • 🔥 Frequent throttling (the processor resets frequencies so as not to burn out) - noticeable by a sharp drop in FPS in games or freezing of video during rendering.
  • 💨 Cooler works at maximum even in simple tasks (for example, when watching YouTube or working in Word).
  • 🔌 Unexpected shutdowns under load - a protective mechanism against overheating (thermal shutdown).
  • 📉 Performance degradation over time: the laptop becomes “stupid” even after cleaning it from dust.

You can check the temperature using utilities like HWMonitor, Core Temp or AIDA64. Critical values for most processors:

Processor type Normal temperature (load) Critical temperature
Intel Core i3/i5/i7 (up to 12th generation) 70–85°C 100°C+
Intel Core i9 / AMD Ryzen 7/9 (H-series) 80–90°C 105°C+
AMD Ryzen 5 (U-series, low power) 65–75°C 95°C+
Apple M1/M2 50–65°C 80°C+ (throttling starts earlier)

If your laptop falls into the "red zone", replace the thermal paste and clean the cooling system will solve the problem in 90% of cases. The exception is physical wear and tear of the cooler or heat pipes (in this case, the radiator will need to be replaced).

📊 How often do you clean your laptop cooling system?
  • Once a year
  • Once every 2-3 years
  • Only when it starts to warm up
  • Never cleaned

Which thermal paste to choose: 2026 rating

The thermal interface market is huge: from cheap Chinese pastes for 100 rubles to professional compounds for 3,000+. Main selection criteria:

  • 🔥 Thermal conductivity (measured in W/m·K) - the higher the better. Minimum for gaming laptops 8–10 W/m·K.
  • ⏳ Service life: Budget pastes dry out in 1–2 years, premium pastes dry out in 4–5 years.
  • 💧 Consistency: thick paste is more difficult to apply, but does not spread; liquid - easier to work with, but can leak over the edges of the chip.
  • 🔌 Electrical conductivity: If the paste is conductive, it may cause a short circuit if it comes into contact with the contacts.

Top 5 thermal pastes for laptops in 2026:

Model Thermal conductivity Service life Price (per 1 g) Better for
Thermal Grizzly Kryonaut 12.5 W/m·K 3–4 years ~800 rub. Gaming laptops, overclocking
Noctua NT-H2 8.5 W/m·K 5+ years ~500 rub. Long term use
Arctic MX-6 11 W/m·K 4 years ~400 rub. Balance price/quality
Coollaboratory Liquid Ultra 38 W/m·K 1–2 years ~1,200 rub. Extreme overclocking (requires experience)
KPX (China) 3–5 W/m·K 6–12 months ~100 rub. Budget renovation

For most users, the optimal choice is Arctic MX-6 or Noctua NT-H2. They do not conduct current, are easy to apply and last a long time. Thermal Grizzly Kryonaut justified only for top configurations (for example, RTX 4090 on a laptop).

⚠️ Attention: Liquid metal pastes (Coollaboratory Liquid Ultra, Thermal Grizzly Conductonaut) give the best result, but require contact insulation Kapton tape. It is dangerous to use them without experience - risk of short circuit!

Preparing for replacement: tools and disassembling the laptop

Before you begin, make sure you have everything you need:

Phillips screwdriver (PH0 or PH00) and flathead|Plastic spatulas for disassembly|Thermal paste (1-2 g)|Isopropyl alcohol (90%+) and cotton swabs|Thermal pads (if replacement is required)|Antistatic wrist strap (optional)|Hair dryer or can of compressed air (for cleaning dust)-->

The most important stage is laptop disassembly. There are no universal instructions here: the design of the case depends on the model. General rules:

  • 🔧 Turn off the power and remove the battery (if it is removable). B MacBook or Dell XPS The battery is often soldered - in this case, simply disconnect the cable from the motherboard.
  • 📸 Take photos of every step, especially the location of cables and screws. B Lenovo ThinkPad or HP EliteBook screws may vary in length!
  • 🔍 Look for hidden latches. For example, in ASUS ZenBook The bottom cover is held in place not only by screws, but also by plastic clips.

Typical pitfalls during disassembly:

  • 💥 Screws under seals (found in Acer or MSI) - they can be carefully cut off with a knife, but this will void the warranty.
  • 🔌 Cables with latches (for example, on a touchpad or keyboard) - you need to pull them straight up, and not to the side.
  • 🔥 Thermal pads on memory chips — they cannot be washed off with alcohol! Only gentle cleaning with a dry cloth.

Removing the cover will reveal the cooling system. In 90% of laptops it looks like this: a radiator with heat pipes, a cooler and two main chips - CPU And GPU (in discrete video cards). In ultrabooks (for example, MacBook Air) there can only be one heatsink per processor.

How to disassemble a MacBook with soldered chips?

B MacBook Pro/Air (2016 and newer) CPU, memory and SSD are soldered to the motherboard. To replace thermal paste:

1. Disconnect the battery cable (required!).

2. Remove the radiator by unscrewing the screws in a diagonal sequence (to avoid deformation).

3. Chips are covered thermal pads, and not paste - they need to be replaced with new ones (thickness is indicated in the service manual).

4. When assembling, use a torque screwdriver (screw tightening torque is 0.6–0.8 Nm).

Step-by-step instructions: removing old paste and applying new one

Now we move on to the most important stage. An error here can lead to overheating or even failure of the chip..

1. Cleaning surfaces

The old thermal paste must be completely removed. To do this:

  1. Soak a cotton swab in isopropyl alcohol (90%+) and carefully wipe the paste off the processor cover and heatsink.
  2. For dried residues, use plastic card (not metal!).
  3. Wipe surfaces dry cloth lint-free. Important: there should be no fibers left on the chip!
⚠️ Attention: Never use acetone or thinner - they can damage the plastic parts of the radiator. Also avoid paper napkins: their fibers remain on the surface and impair thermal conductivity.

2. Applying new thermal paste

The most controversial point - how much paste to apply. Too much is just as harmful as too little:

  • 🔴 Too much → the paste will spread over the edges, get on the resistors and may cause a short circuit.
  • 🔴 Too little → air gaps remain, impairing heat dissipation.

Optimal application methods:

  • ⚪ Dot (for small chips) - a drop the size of a pea (4–5 mm) in the center of the lid.
  • ➖ Line (for long chips) - a thin strip in the middle (for example, for AMD Ryzen 9).
  • ✖️ Cross (for large chips) - two perpendicular lines (suitable for Intel Core i9 or NVIDIA RTX).

After application do not spread the paste — it will be evenly distributed when tightening the radiator. Exception: liquid metal pastes (they need to be spread with a spatula).

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For precise dosing, use silicone spatula or plastic card. The thermal paste manufacturer's website often has a quantity calculator (for example, Noctua or Arctic).

3. Assembly and testing

After applying the paste:

  1. Carefully reinstall the radiator and tighten the screws crosswise (to avoid skew).
  2. Connect the cooler and check that it rotates freely (no touching the wires).
  3. Reassemble the laptop in reverse order, referring to the photographs.

First launch - stress test:

1. Install Prime95 (for CPU) or FurMark (for GPU).

2. Run the test for 10-15 minutes and monitor the temperatures in HWMonitor.

3. If the temperature has dropped by 10–20°C compared to “before”, everything has been done correctly.

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The ideal result is a temperature under load of no higher than 80–85°C for the CPU and 75–80°C for the GPU. If the difference with previous values is less than 5°C, errors are possible: too little paste, poor cleaning or a defective radiator.

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes. Here are the most common:

  • 🔧 Retightening radiator screws → deformation of heat pipes or cracks on the chip. Solution: Use a torque screwdriver (tightening torque 0.5–0.8 Nm).
  • 💧 Paste getting on contacts → short circuit. Solution: Before applying, tape the contacts around the chip Kapton tape.
  • 🔥 Using expired toothpaste → deterioration of thermal conductivity. Solution: Check the production date on the tube (shelf life is 2-3 years).
  • 📱 Forgot to disconnect the battery → risk of damage to the motherboard due to static electricity. Solution: work for grounded table or use an antistatic wrist strap.

Special attention - laptops with soldered chips (MacBook, Dell XPS, HP Spectre). This is where mistakes are costly:

  • 🔨 Damage to thermal pads → overheating of memory chips or power controller.
  • 🔌 Broken battery cable → the laptop will not turn on without repair.

If you doubt your abilities, it is better to contact the service. For example, replacing thermal paste in MacBook Pro 16" with soldering it will cost 3,000–5,000 rubles, but this is cheaper than repairs after unsuccessful disassembly.

Alternative Cooling Methods

Replacing thermal paste is not the only way to combat overheating. If your temperature remains high after the procedure, consider additional measures:

  • 💨 Cooling pad with fans - reduces the temperature by 5–10°C. Effective for gaming laptops (ASUS TUF, MSI GF63).
  • ⚙️ Undervolting (CPU/GPU voltage reduction) - reduces heat dissipation without loss of performance. For Intel use ThrottleStop, for AMD — Ryzen Controller.
  • 🔄 Replacing thermal pads on memory chips and VRM - relevant for laptops with soldering (for example, MacBook or Dell Precision).
  • 🧊 Liquid metal paste — gives a temperature reduction of 10–15°C, but requires experience (risk of short circuit).

For owners MacBook with chips Apple M1/M2 there is a nuance: these processors heat up less than Intel/AMD, but sensitive to uneven radiator pressure. When replacing the paste, be sure to check the tightness of the heat pipes.

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If after replacing the paste the cooler becomes louder, check fan curve in BIOS. Some laptops (eg. Lenovo Legion) After disassembly, the cooling settings are reset.

FAQ: answers to frequently asked questions

❓ Is it possible to use thermal paste from a computer for a laptop?

Yes, but with reservations. PC pastes (for example, Arctic MX-4) are also suitable for laptops, but:

  • In laptops the thickness of the paste layer is thinner (0.1–0.3 mm versus 0.5 mm in PC), so thick pastes are more difficult to apply.
  • For ultrabooks (MacBook Air, Dell XPS 13) it is better to choose pastes with low viscosity (For example, Noctua NT-H1).
❓ How often should you change the thermal paste in your laptop?

The service life depends on the quality of the paste and operating conditions:

  • Budget pastes (KPX, DeepCool Z5) - once every 1–1.5 years.
  • Middle segment (Arctic MX-6, Noctua NT-H2) - once every 3–4 years.
  • Premium pastes (Thermal Grizzly Kryonaut) - once every 4–5 years.

If the laptop is used in a dusty environment or frequently overheats, the interval will be reduced.

❓ What to do if the temperature rises after replacing the pasta?

Possible causes and solutions:

  • Poor cleaning — the remains of the old paste create air gaps. Solution: Disassemble the laptop again and clean again.
  • Too much/too little paste → redo the application (see section above).
  • Damaged thermal pads on memory chips. Solution: Replace them with new ones (the thickness must match!).
  • Radiator defect (clogged heat pipes). Solution: Blow out the pipes with compressed air or replace the radiator.
❓ Do I need to change thermal paste in a new laptop?

In 90% of cases - no. Manufacturers (eg ASUS, MSI) use high-quality thermal interfaces that last 2–3 years. Exceptions:

  • Laptops with soldering chips (MacBook, Dell XPS) - sometimes thermal pads are applied with defects.
  • Budget models (Acer Aspire, Lenovo IdeaPad) - can save on pasta.

If the temperature in your new laptop is higher than normal (see table above), first check dust in the radiator And fan settings in BIOS.

❓ Is it possible to use other materials instead of thermal paste?

Theoretically yes, but in practice it is risky:

  • Toothpaste - conducts heat worse than air. After 10 minutes of operation, the laptop will overheat.
  • Vaseline, oil — do not dry out, but have extremely low thermal conductivity (~0.2 W/m K).
  • Liquid metal (gallium) - effective, but corrodes aluminum radiators. For use with copper surfaces only.

The only alternative is thermal pads (for memory chips), but they will not replace the paste on the CPU/GPU.