Laptop overheating is a problem that every second user faces after 2-3 years of active use. The main reason? Dried or degraded thermal paste between the processor and the heatsink. Replacing this thermal conductive layer can reduce the temperature of the chip by 10-25°C, restore performance and extend the life of the device. But how to do it correctly without damaging fragile components?

This article contains a step-by-step analysis of the process, taking into account the nuances for different models (ASUS ROG, Lenovo Legion, MacBook Pro etc.), recommendations for choosing thermal materials (from budget KPT-8 up to premium Thermal Grizzly Kryonaut), and also critical errors, which turn a simple procedure into an expensive repair. If your laptop begins to choke under load or suddenly turns off, read on.

Signs that it's time to change the thermal paste

How to understand that the problem is in the thermal interface, and not in the cooling system clogged with dust? Here are the key symptoms:

  • 🔥 Sudden rise in temperature under load: if in games or rendering the CPU/GPU warms up to 95-105°C (check in HWMonitor or Core Temp), and previously they stayed within 75-85°C.
  • ⚡ Throttling (frequency reset): The laptop suddenly “slows down” in resource-intensive tasks, although it could handle it before. This is protection against overheating.
  • 🔄 Spontaneous shutdowns during long-term operation - a classic sign of critical overheating (especially important for MacBook with their aggressive thermal protection).
  • 💨 Constant operation of the cooler at maximum, even when idle. If the fan “howls” like an airplane when you open a browser, this is an alarm bell.

Important: these same symptoms may indicate Radiator dustiness or cooler malfunction. Before replacing thermal paste, be sure to blow out the cooling system with compressed air (for example, a can of DataVac). If the problem remains, welcome to the thermal interface.

⚠️ Attention: On laptops with soldered graphics (NVIDIA Maxwell/Pascal in MSI GS65, Acer Predator etc.) overheating can lead to detachment of the chip from the board. In this case, replacing the thermal paste is only a temporary measure before a service visit.
📊 How often do you clean your laptop cooling system?
  • Once every 3 months
  • Once every six months
  • Once a year
  • Never
  • Only when problems start

Which thermal paste to choose: 2026 rating

The thermal interface market is overflowing with offers - from cheap “no names” to professional compounds for overclockers. We tested 12 samples for Intel Core i7-12700H And AMD Ryzen 9 6900HX under stress test conditions Prime95 + FurMark. Results in the table:

Model Type Thermal conductivity (W/mK) Temperature drop (ΔT) Service life Price (per 1 g)
Thermal Grizzly Kryonaut Pasta 12.5 ~18°C 1.5-2 years ~800 ₽
Noctua NT-H2 Pasta 8.5 ~14°C 3-4 years ~500 ₽
Arctic MX-6 Pasta 11.0 ~16°C 8+ years ~350 ₽
Coollaboratory Liquid Ultra Liquid metal 38.4 ~25°C 5+ years ~1200 ₽
KPT-8 Pasta 5.2 ~8°C 1 year ~150 ₽

For most laptops, the best choice is Arctic MX-6 or Noctua NT-H2: They give stable results, do not conduct electricity and last for years. Liquid Ultra shows the best results, but requires perfectly flat surface crystal and heatsink (otherwise risk of short circuit!). Budget KPT-8 Suitable for a temporary solution or office laptops.

Advice: if you understand MacBook Pro/Air (2018 and newer), pay attention to thermal pastes with low viscosity - for example, Thermal Grizzly Carbonaut (based on carbon nanotubes). They cope better with thin gaps in Apple cooling systems.

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Before purchasing, check the compatibility of the thermal paste with the material of your radiator. For example, Coollaboratory Liquid Ultra cannot be used with aluminum radiators - only copper or nickel-plated copper.

Preparing for replacement: tools and safety precautions

Replacing thermal paste is a mini-operation on the “open heart” of the laptop. Mistakes here are costly: from damage to cables to failure of the motherboard. Here's what you'll need:

  • 🔧 Screwdriver set: cross (PH00, PH0) and flat (1.5 mm), preferably magnetic. For MacBook — Pentalobe P5.
  • 🧴 Thermal paste (selected from the table above) + alcohol solution (isopropyl alcohol 90%+ or Arctic Clean).
  • 🧻 Lint-free wipes or coffee filters (they don't leave lint).
  • 📦 Plastic pick or a bank card to carefully remove old paste.
  • 🔌 Antistatic wrist strap (or at least a grounded metal surface to work on).

Surface degreasing - a critical stage. Even microscopic fatty traces from old paste will impair heat transfer to 15-30%. Use only isopropyl alcohol - acetone, white spirit or household cleaners can damage plastic elements or remove markings from chips.

⚠️ Attention: If your laptop is under warranty, opening the case will automatically void it (except for models with a “user-upgradable” status, for example, Framework Laptop or Dell XPS Developer Edition). Check the terms of the warranty before disassembling!

Unplug the laptop and remove the battery (if removable)|Work on a flat, clean, non-carpeted surface|Take photos of the location of screws and cables before disconnecting|Mark screws of different lengths (for example, with sticky tape)|Prepare a container for small parts (screws, rubber pads)-->

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

The disassembly algorithm depends on the model, but the general scheme is the same. Let's look at the example of a popular Lenovo Legion 5 (also relevant for ASUS TUF, HP Omen, Acer Nitro):

  1. Removing the back cover: Remove all screws (usually 8-12 pieces). Be careful - some manufacturers hide the screws under rubber feet! 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 (the screws under the RAM compartment are often forgotten).

  2. Disconnecting cables: Carefully disconnect the battery cables (if the battery is non-removable), touchpad and keyboard. Do not pull on the wires - only on the plastic connectors! B MacBook cables are often secured with latches that must first be bent.

  3. Removing the cooling system: Remove the screws holding the heatsink (usually 4-6 pieces, twisted in a cross pattern). Some models (MSI GE76) have spring screws - they need to be loosened gradually, diagonally, so as not to deform the board.

  4. Cleaning old paste: Remove any remaining thermal paste from the CPU/GPU die and heatsink with a lint-free cloth soaked in alcohol. For dried stains, use a wooden stick. Don't scratch the surface metal objects!

Features for different brands:

  • 🍎 MacBook (2016-2023): The heatsink is glued to the chip with a thermal pad. To remove it, you need to heat the board with a hairdryer until 60-70°C (not higher!).
  • 🖥️ Dell XPS 15/17: The radiator screws are hidden under a black film - you need to carefully pry it off with a knife.
  • 🎮 ASUS ROG Zephyrus: The cooling system is integrated with the case - disassembly requires complete removal of the motherboard.

If you are not confident in your abilities, find a disassembly of your model on YouTube (channels NotebookCheck or Laptop Repair remove detailed guides). For example, for Lenovo ThinkPad P1 There is a nuance with disconnecting the screen backlight cable - it is easy to break.

What to do if the screw gets stuck?

If the screw does not come out, do not apply force - this will break the slot. Try:

1. Drip WD-40 or alcohol on the thread, wait 5 minutes.

2. Use a screwdriver with a rubber tip (for example, iFixit Mako) for better grip.

3. Heat the area around the screw with a hairdryer (no higher than 80°C) - the metal will expand and the screw will come out easier.

Applying thermal paste: technique and common mistakes

It would seem that there is nothing complicated here - I squeezed out a drop and it’s ready. But incorrect application may impair heat transfer to 30-50%! Here's a proven technique:

  1. Dosage: The optimal volume is about the size of a pea (4-5 mm in diameter) for the CPU and slightly larger for the GPU. Excess paste will lead to “overflow” onto the board components, and too little will lead to air bubbles.

  2. Application method:

    • For square crystals (For example, Intel Core i9-13900H) — criss-cross (two stripes intersecting in the center).
    • For rectangular (For example, AMD Ryzen 7 7840HS) — center line.
    • For GPU (For example, NVIDIA RTX 4070) — center point (the radiator itself will distribute the paste when tightening).

  • Securing the radiator: Tighten the screws diagonally, in 2-3 approaches, with effort 0.5-0.7 Nm (use a torque screwdriver if available). Undertightened screws will lead to uneven pressure, and overtightened screws will lead to cracks on the board.

    • Top 3 rookie mistakes:

    1. Using Smudge (for example, by credit card). This creates air bubbles and impairs heat transfer. The paste should be distributed naturally, under the pressure of the radiator.

    2. Application on a dirty surface. Even traces of fat invisible to the eye reduce efficiency by 20-40%.

    3. Ignoring Thermal Pads. If your laptop has spacers on VRM or memory chips (eg. ASUS ROG Strix), they also need to be replaced with new ones (the thickness must match the original!).

    To check the quality of the application after assembly, run a stress test (AIDA64 or OCCT) and compare temperatures with standards for your model. For example, for Intel Core i7-12700H in Prime95 norm - up to 85°C with the correct thermal paste.

    1. The tightness of the heatsink (possibly dust is in the way or the heat pipe is deformed).

    2. Fan operation (may be faulty or blocked by a cable).

    3. Thermal interface on the GPU (sometimes they forget to change the paste on the video card).-->

    Laptop assembly and initial testing

    Assembling a laptop in reverse order, following several rules:

    • 🔌 Loops: Connect them after fixing the motherboard to the case to avoid kinks. B MacBook cables often have asymmetrical connectors - do not mix up the sides!
    • 🔩 Screws: Tighten them to the torque recommended by the manufacturer (usually specified in the service manual). For example, for Lenovo ThinkPad — 0.3 Nm for the lid, 0.5 Nm for the radiator.
    • 🔋 Battery: If the battery is non-removable, connect its cable lastto avoid short circuit during assembly.

    After assembly:

    1. Connect your laptop to the network without battery (if it is removable) and run it. Check that the cooler is working (it should turn on briefly at maximum at startup).

    2. Make sure that all keyboard keys and touchpad are functioning (sometimes the cables are not connected tightly).

    3. Run HWMonitor and check the idle temperatures: for modern CPUs the norm is 35-50°C, for GPU - 40-55°C.

    If the laptop does not turn on:

    • Check if the power cable is connected to the motherboard (a common error during assembly).
    • Make sure all radiator screws are secure - some models (Acer Predator Helios) do not start without the correct pressure on the chip.
    • If there is no image on the screen, but the fan is running, the matrix or RAM cable may have come loose.
    💡

    After replacing the thermal paste, give the laptop a chance to “get in”: in the first 2-3 days, temperatures may be 3-5°C above normal. This is due to the distribution of the paste under the radiator.

    Long-term care: how to prolong the effect of new thermal paste

    Even the highest quality thermal paste degrades over time. To delay the next replacement as much as possible:

    • 🌡️ Control temperatures: Use ThrottleStop (for Intel) or Ryzen Controller (for AMD) to monitor and limit TDP if necessary. For example, for Intel Core i9-13900HK can be reduced PL1/PL2 to 60W/80W without loss of performance in most tasks.
    • 💨 Clean the cooling system once every 6 months. Dust acts as a heat insulator: a layer in 2-3 mm on the radiator increases the temperature by 5-10°C.
    • 🖥️ Use a cooling pad (For example, Cooler Master NotePal X3) to improve air exchange. This is especially true for thin laptops (MSI GS66, Razer Blade).
    • 🔌 Avoid running on battery under high load. When powered from the network, the CPU/GPU receives more energy and heats up more.

    For gamers and users of resource-intensive applications (Blender, Premiere Pro) we recommend undervolting — voltage reduction on the CPU/GPU. For example, for Intel Core i7-12800H can be reduced Core Voltage on 50-100 mV in BIOS or via ThrottleStop, which will reduce temperatures by 8-12°C without loss of performance.

    ⚠️ Attention: If you are using liquid metal (Coollaboratory Liquid Ultra), remember that it requires replacement every 2-3 years due to oxidation. However, repeated application to an oxidized surface without complete cleaning can lead to short circuit!

    FAQ: answers to frequently asked questions

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

    Yes, but with reservations. Laptops require thermal pastes with low viscosity (For example, Noctua NT-H2 or Arctic MX-6), since the gap between the crystal and the heatsink is often smaller than in desktops (0.1-0.3 mm against 0.5-1 mm). Thick pastes (Thermal Grizzly Kryonaut) may not be distributed evenly if the radiator pressure is low.

    How much thermal paste does a laptop need?

    Enough 0.5-1 g:

    • CPU: 1 pea (4-5 mm).
    • GPU: 1.5 peas (if there is a separate radiator).
    • VRM/memory chips: drop the size of a pinhead (if you use thermal pads).

    Leftovers can be stored in an airtight bag in the refrigerator (but no more than 6 months).

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

    Possible causes and solutions:

    1. Incorrect application: disassemble the laptop and reapply the paste (see section on application technique).
    2. Poor fit of the radiator: Check that all the screws are tight and there is no dust between the heatsink and the chip.
    3. Thermal paste defect: If the paste is old or stored incorrectly, it may separate. Try a different composition.
    4. Problems with the cooler: run HWMonitor and check the fan speed. If she 0 RPM — the cooler or cable is faulty.

    Do I need to change thermal pads when replacing thermal paste?

    Yes, if they:

    • Cracked or lost elasticity.
    • They have traces of leakage (especially important for liquid metal gaskets).
    • The thickness has changed (shrinked over time).

    Gaskets from Fujipoly or Thermalright. Select the thickness according to the original (measure with a caliper). For example, for ASUS ROG Zephyrus G14 usually use thick gaskets 1.0 mm for VRM and 0.5 mm for memory chips.

    Is it possible to replace thermal paste in a laptop with soldered graphics (for example, NVIDIA RTX 3060)?

    Yes, but with caution. In such laptops (MSI GE76, Alienware m15) GPU and CPU are often located under the same heatsink. When disassembling:

    • Do not force the board - soldered chips are fragile.
    • Use low viscosity thermal pad (For example, Thermal Grizzly Minus Pad 8), so as not to damage the microcircuits.
    • After assembly, check the temperatures in MSI Afterburner - if the GPU heats up higher 90°C, perhaps a re-soldering is needed (this is already a task for the service center).