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 begin to “suffocate” under load if you do not pay attention to the cooling system. The main culprit is dried thermal paste between the processor and the heatsink. It loses thermal conductivity, turning into a solid layer that not only does not remove heat, but can also damage the CPU crystal if overheated for a long time.

Replacing thermal paste at a service center will cost 1,500–3,000 rubles, but the procedure is easy to carry out yourself, saving time and money. In this article you will find step-by-step instructions with photos, tips for choosing a thermal interface, as well as unique life hacks for laptops with soldering chips (for example, MacBook Pro or Dell XPS). We will figure out how to avoid common mistakes that lead to even greater overheating or equipment failure.

Signs that it's time to change the thermal paste

A laptop doesn't always scream about cooling problems in obvious ways. Sometimes symptoms are disguised as viruses or OS glitches. Here are the key signals that indicate degraded thermal interface:

  • 🔥 Sudden rise in temperature under load: if in games or rendering the CPU heats up to 95–105°C (checked in HWMonitor or Core Temp), and the cooler is running at maximum - this is a clear signal.
  • 💻 Random shutdowns during resource-intensive tasks: the laptop suddenly turns off, although the battery charge is normal. This triggers overheating protection.
  • ⚡ CPU throttling: in Task Manager it is clear that the CPU frequency drops to 0.8–1.2 GHz instead of nominal 3.5–5.0 GHz, although the load is 100%.
  • 🔊 Constant cooler noise even during idle time: if the fan “howls” at full speed with the browser open, the thermal paste can no longer cope.

It is especially critical to monitor the temperature in laptops with low-end cooling systems (for example, Acer Aspire 5 or HP Pavilion), where the radiators are small and the heat pipes are thin. In such models, even minimal deterioration in the thermal conductivity of the paste leads to overheating.

⚠️ Attention: If the laptop turns off immediately after turning it on (within 1-3 seconds), this may indicate short circuit due to thermal paste getting on the motherboard contacts. In this case, self-repair is dangerous - contact service!

Which thermal paste to choose for a laptop: rating 2026

The thermal interface market is overflowing with offers - from budget KPT-8 up to bonus Thermal Grizzly Kryonaut. But not every paste is suitable for a laptop. Main selection criteria:

  • 📊 Thermal conductivity (> 10 W/mK for gaming laptops, > 5 W/mK for office).
  • ⏳ Durability: liquid metal pastes (Coollaboratory Liquid Ultra) last 5+ years, but require careful application.
  • 💧 Consistency: thick pastes (Noctua NT-H2) do not spread, but are more difficult to apply; liquid (Arctic MX-6) are easier to distribute, but may leak if overheated.
Thermal paste model Thermal conductivity (W/mK) Service life Price (3 g) Better for
Thermal Grizzly Kryonaut 12.5 2–3 years ~800 ₽ Gaming laptops (ASUS TUF, Lenovo Legion)
Noctua NT-H2 8.9 5+ years ~600 ₽ Office laptops (Dell Latitude, HP EliteBook)
Arctic MX-6 11.0 8 years ~500 ₽ Universal option
Coollaboratory Liquid Ultra 38.4 10+ years ~1 200 ₽ Extreme overclocking (requires experience!)

For most users, the optimal choice is Arctic MX-6 or Noctua NT-H2. They do not conduct electricity (safe if they come into contact with the board), are easy to apply and last a long time. Liquid metal pastes (Coollaboratory) give the best result, but their cannot be used on aluminum radiators (copper only!) and requires protection of contacts with Kapton tape.

📊 What thermal paste do you use?
  • Thermal Grizzly Kryonaut
  • Noctua NT-H2
  • Arctic MX-6
  • Another (write in the comments)
  • I don't know which one I have

Preparing for replacement: tools and safety precautions

Before disassembling your laptop, prepare your work area and tools. You will need:

  • ⚒️ Screwdriver set: cross (PH00, PH0) and flat for plastic latches.
  • 🧴 Thermal paste (selected from the table above) + alcohol solution (isopropyl alcohol 90%+ or Arctic Clean).
  • 🧻 Lint-free wipes or coffee filters (plain paper leaves lint!).
  • 📦 Plastic pick (to release the case latches without scratching).
  • 🔌 Antistatic wrist strap (optional, but recommended to protect the motherboard).

Important: Work on a table with a flat surface, preferably on an antistatic mat. If there is none, touch your hand to a radiator or a metal object before picking up the motherboard - this will relieve static electricity.

⚠️ Attention: Some laptops (eg. MacBook Air M1/M2 or Microsoft Surface) have disposable screws with three-point slot (Y00). They cannot be unscrewed with a regular screwdriver - you will need a specialized set (iFixit Pro Tech Toolkit).

Disconnect the laptop from the network and remove the battery (if removable)

Take photos of the location of screws and cables

Prepare containers for small parts (screws, washers)

Check that the thermal paste is not expired (expiration date on the package) -->

Step-by-step instructions: how to disassemble a laptop and get to the processor

The disassembly algorithm depends on the laptop model, but the general scheme is the same. We will consider a universal method suitable for 80% of devices (with the exception of ultrabooks with soldered components).

Step 1: Turn off the power and remove the back cover

  1. Turn off the laptop, unplug the charger and remove the battery (if it is removable). In models with a soldered battery (MacBook Pro, Xiaomi Mi Notebook) just disconnect the power cable from the motherboard.
  2. Turn the laptop over and unscrew all screws on the back cover. Please note: Some screws may be hidden under feet or stickers.
  3. Gently pry the lid open with a plastic pick, starting from the corner. If the cover does not budge, check that all the screws are unscrewed (sometimes they are hidden under rubber plugs).

Step 2: Disconnecting the Cooling System

  1. Find a heatsink (a metal structure with heat pipes). Usually it covers the processor and video card.
  2. Unscrew the screws securing the radiator, diagonallyto avoid skew. In some laptops (HP Omen, Alienware) the screws have spring washers - don't lose them!
  3. Carefully remove the radiator. If it gets stuck, don’t pull it - gently rock it from side to side. If there is resistance, check that all screws are unscrewed.

Step 3: Cleaning Old Thermal Paste

  1. Dampen a lint-free cloth with isopropyl alcohol and with gentle circular movements remove old paste from the processor and heatsink. Do not rub with force - the CPU crystal is fragile!
  2. For dried paste, use Arctic Clean or a wooden stick (not metal!).
  3. Allow surfaces to dry completely (5-10 minutes). Check that there are no paste particles left on the edges of the socket.
What to do if the radiator screws cannot be unscrewed?

If the screw is “lost” or does not budge, try:

1. Use a screwdriver with a magnetic tip.

2. Drip WD-40 and wait 10 minutes.

3. Heat the screw with a hairdryer (not higher than 60°C) - the metal will expand and the thread will weaken.

If all else fails, contact service so as not to tear off the spline.

Applying new thermal paste: technique and mistakes

The most critical stage is applying the thermal interface. Here, many make critical mistakes that nullify the entire procedure. Let's sort it out right and wrong ways.

How NOT to apply thermal paste:

  • ❌ Too much (“a drop the size of a pea” is a myth! Enough for laptops 0.1–0.2 g).
  • ❌ Finger smearing - There is fat on the skin, which impairs thermal conductivity.
  • ❌ Application on a dirty surface (dust, remnants of old paste).

Correct technique (cross method):

  1. Place the laptop on a flat surface. Take thermal paste (for example, Arctic MX-6) and squeeze out a drop the size of a grain of rice (diameter ~3–4 mm) to the center of the processor.
  2. Take a plastic card (or a special spatula) and spread the paste thin layer (thickness ~0.1 mm) over the entire surface of the crystal. The movements should be cross-shaped: first vertically, then horizontally.
  3. Make sure the paste covers the entire processor area, but does not go beyond the edges. Remove excess with a napkin.
  4. Repeat the procedure for video chip (if your model has it).

For liquid metal pastes (Coollaboratory Liquid Ultra) other technology:

  • Apply only for copper radiators (aluminum corrodes!).
  • Use 2 times less quantities than regular paste.
  • Be sure to tape the contacts around the socket Kapton tape - liquid metal conducts electricity!
💡

If you have a laptop with BGA processor (soldered to the board, as in MacBook or Dell XPS), apply thermal paste only for the radiator, not on the chip. This will prevent paste from getting under the chip during assembly.

Laptop assembly and testing

After applying thermal paste, all that remains is to assemble the laptop and check the result. It is important to take your time here and follow the reverse order of disassembly.

Assembly order:

  1. Reinstall the radiator and tighten the screws crosswiseto avoid skew. Tighten them gradually, 1-2 turns at a time.
  2. Connect all cables (especially carefully - battery and keyboard cables). In laptops Lenovo ThinkPad Fragile connectors are common - do not force!
  3. Install the back cover and tighten the screws. Check that there are no gaps anywhere.

Testing:

  • Turn on your laptop and check that it boots without errors.
  • Run a stress test (Prime95 for CPU, FurMark for GPU) and monitor temperatures in HWMonitor:
    • 🟢 Norm: to 85°C under load (for gaming laptops - up to 90°C).
    • 🟡 Warning: 90–95°C — check whether the radiator is installed level.
    • 🔴 Dangerous: higher 95°C — disassemble the laptop and reapply the paste.
⚠️ Attention: If after replacing the thermal paste the temperature grew up (for example, instead of 80°C became 88°C), most likely you applied too much paste or installed the radiator incorrectly. Also check if you forgot to connect the cooler to power!
💡

The ideal result after replacing thermal paste is a decrease in temperature by 10–20°C under load and reducing cooler noise when idle.

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes that lead to poor cooling or damage to the laptop. Here are the most common of them:

  • 🔧 Retightening the radiator screws → deformation of heat pipes or cracks on the board. Solution: tighten the screws with a force of no more than 0.5–0.7 Nm (use a torque screwdriver if available).
  • 🧴 Using expired thermal paste → loss of thermal conductivity. Solution: check the expiration date on the tube (usually 2-3 years).
  • 🔌 They forget to connect the cooler → laptop overheating and shutting down. Solution: After assembly, always check that the fan spins when turned on.
  • 💻 Paste getting on contacts → short circuit. Solution: For liquid metal pastes, use Kapton tape; for regular pastes, apply carefully.

Another typical problem is incorrect choice of thermal paste for a specific model. For example, in thin ultrabooks (MacBook Air, Huawei MateBook) radiators are small, and thick paste (Noctua NT-H1) may not have time to spread over the surface. In such cases, it is better to use liquid pastes (Arctic MX-6).

FAQ: answers to popular questions

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

The service life of thermal paste depends on its type and operating conditions:

  • Budget pastes (KPT-8, AlSil-3): once every 1–1.5 years.
  • Middle segment (Arctic MX-4/6, Noctua NT-H2): once every 2–3 years.
  • Premium and liquid metal (Thermal Grizzly, Coollaboratory): once every 4–5 years.

If the laptop is used in a dusty room or often works under load (games, rendering), the interval is reduced by 30%.

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

Yes, but with reservations:

  • 🟢 Suitable: Arctic MX-6, Noctua NT-H2, Thermal Grizzly Kryonaut - they are universal.
  • 🔴 Not suitable: cheap pastes with abrasive particles (Titanium, some DeepCool) - can scratch the processor crystal.

The main difference is quantity: A laptop needs 2–3 times less paste than a PC.

❓ What to do if after replacing the thermal paste the laptop began to heat up more?

Causes and solutions:

  1. Incorrect amount of paste → disassemble the laptop, remove excess and reapply (a drop the size of a grain of rice).
  2. Poor contact between the heatsink and the processor → check whether the radiator fits evenly and whether the screws are misaligned.
  3. Forgot to connect the cooler → disassemble the laptop and check the fan cable.
  4. Paste getting on contacts → clean the board with alcohol (if the paste is not conductive) or contact service.
❓ Do I need to change thermal pads on memory chips when replacing thermal paste?

Thermal pads (soft gray or black pads on RAM or VRM chips) also lose elasticity and thermal conductivity over time. Their it is recommended to replace, if:

  • They have become hard or crumble.
  • The laptop is used for mining or rendering (high memory load).

Gaskets are suitable for replacement Arctic Thermal Pad thick 0.5–1.5 mm (measure the old ones with a caliper).

❓ Is it possible to use other materials (for example, toothpaste) instead of thermal paste?

❌ Absolutely not! Toothpaste, Vaseline, glue and other “folk” remedies:

  • They do not conduct heat (their thermal conductivity < 1 W/mK).
  • May damage contacts (for example, peppermint toothpaste contains abrasives).
  • They dry out in a few days, after which overheating will intensify.

The only alternative in case of emergency is medical Vaseline (thermal conductivity ~0.2 W/mK), but it will last no more than a week.