Replacing thermal paste in a laptop: step by step from preparation to testing

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 “choke” the processor, issuing 100°C in games or rendering. The culprit is dried thermal paste, which loses thermal conductivity and turns into a hard crust between the CPU/GPU crystal and the heatsink.

Replacing thermal paste is a procedure that you can do yourself, saving on the cost of a service center. But accuracy is important here: incorrect application or choosing a low-quality material can aggravate the problem. In this article we will analyze what thermal paste to choose, how to disassemble a laptop without damage, and what to do if the temperature does not drop after replacement. We’ll also reveal the myths about “eternal” pastes and show you how to check the result without special programs.

Signs that it's time to change the thermal paste

A laptop doesn't always signal overheating in obvious ways. Sometimes symptoms are disguised as other problems. Here are the key “bells” that are worth paying attention to:

• 🔥 Random shutdowns under load (especially in games or when rendering video). It works thermal shutdown - emergency shutdown to protect the chip from damage.
• 💨 Constantly running cooler at maximum, even for simple tasks (for example, in Word or browser). Normal paste reduces the load on the fans.
• 📉 Throttling (frequency drop): in HWMonitor or Core Temp it is clear that the processor reduces the frequency from 4.0 GHz to 0.8 GHz when heated.
• 🖥️ Hot case in the keyboard area (on the left - CPU, on the right - GPU). If the hand does not tolerate touch, this is a direct signal.

If at least 2-3 signs from the list appear, it’s time to act. But before disassembling the laptop be sure to check the temperatures in a stress test (for example, in AIDA64 or Prime95). The norm for modern processors under load: 70-85°C. If the values are higher 90°C — The thermal paste definitely needs replacing.

⚠️ Attention: On laptops with NVIDIA Optimus (hybrid graphics) overheating may manifest itself as artifacts on the screen - stripes, flickering or “snow”. This is a sign of problems with the thermal paste on video chip, not the processor.

Which thermal paste to choose: 2026 rating

The thermal interface market is flooded with offers - from cheap “no-name” pastes to premium compositions with diamond dust. We tested 15 samples and selected the best options for different budgets and tasks:

Model	Type	Thermal conductivity (W/mK)	Service life	Price (per 1 g)	Better for
Thermal Grizzly Kryonaut	Based on microparticles	12.5	2-3 years	~800 ₽	Gaming laptops, overclocking
Noctua NT-H2	Hybrid	8.9	5+ years	~500 ₽	Long term use
Arctic MX-6	Metal oxide	11.0	8 years	~400 ₽	Budget option
Coollaboratory Liquid Ultra	Liquid metal	38.4	10+ years	~1500 ₽	Extreme overclocking
Deepcool Z9	Ceramic	5.6	3 years	~200 ₽	Office laptops

For most users, the optimal choice is Arctic MX-6 or Noctua NT-H2. They combine high thermal conductivity, long service life and ease of application. Liquid metal pastes (for example, Coollaboratory) require experience: if applied incorrectly, they can short out the contacts on the motherboard!

Pay special attention thermal pads for memory chips and VRM modules. They should also be replaced if they become hard or crumble. Good option - Thermalright Extreme Odyssey (1.5 mm thick).

Preparing for replacement: tools and safety precautions

Disassembling a laptop is not reassembling it LEGO. Accuracy and the right tools are important here. Here's what you'll need:

• 🔧 Screwdriver set: cross PH00 (for most screws), hex 1.5 mm (for some models Dell), a plastic mediator for releasing the latches.
• 🧴 Thermal paste (selected from the table above) + alcohol solution (isopropyl alcohol 90%+ or Arctic Clean).
• 🧻 Lint-free wipes or coffee filters (plain paper may leave lint).
• 📦 Screw organizer (or magnetic substrate). The loss of even one screw can lead to uneven pressure on the radiator!

Important: Before disassembly completely unplug the laptop And remove the battery (if it is removable). On models with a non-removable battery (for example, MacBook Pro or Xiaomi Mi Notebook) disconnect the power cable from the motherboard.

⚠️ Attention: Some laptops (eg. Lenovo Yoga or HP Spectre) have hidden screws under the rubber feet. If you do not unscrew them, you may break the case latches during disassembly!

Work for clean, illuminated surface no carpets (static electricity!). If you have long hair, tie it up to prevent it from getting caught in the cooler. And most importantly: don't use force when separating parts. If something doesn’t give in, look for hidden latches or screws.

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

There is no universal disassembly guide - the design of laptops is very different. But the general algorithm looks like this:

1. Remove the bottom cover. On most models it is secured with screws around the perimeter. Start by unscrewing all visible screws (usually marked with arrows). On MacBook you will need a special screwdriver Pentalobe P5.
2. Disconnect the cables. Carefully pry the latches on the connectors SATA, M.2, touchpad and keyboard. Do not pull on the wires - only on the plastic connectors!
3. Remove the cooling system. The radiator is secured with 3-6 screws (sometimes with springs). Unscrew them diagonallyso as not to deform the board. On some models (MSI GS66) you will have to remove the video card first.

Now you will see the processor and video card chip. They will be covered with a layer of old thermal paste (possibly already hardened). Do not touch the crystals with your fingers — oil from the skin impairs thermal conductivity.

If this is your first time disassembling a laptop, take photos of each stage to the phone. This will help put everything back together without errors. Pay special attention to:

• 🔌 Location of the cables (they often look the same, but connect to different connectors).
• 🔩 Screw length - laptops use screws of different lengths for different parts of the case.

What to do if the screw breaks?

If the screw breaks off while unscrewing, don't panic. Take a thin drill (1-1.5 mm) and carefully drill out the remaining parts. Then tap the new threads or use a screw with a rubber washer (such as one from a phone repair kit).

Removing old thermal paste and applying new one

This is the most critical stage. Even the best thermal paste will not save you from overheating if applied incorrectly. Follow this algorithm:

1. Surface cleaning. Dampen a lint-free cloth with isopropyl alcohol and gently wipe off any old paste from the processor, graphics card, and heatsink. For hardened residues, use plastic scraper (for example, a credit card). Don't scratch the metal!
2. Degreasing. After removing the paste, wipe the surfaces dry cloth, then again with alcohol. Wait for it to dry completely (1-2 minutes).
3. Applying new paste. The optimal method is pea method:
   • For CPU: a drop the size of 4-5 mm (about the size of half a pea).
   • For GPU: drop 3-4 mm (video chips are usually smaller than processors).

When pressed with a radiator, the paste will be evenly distributed.

What NOT to do:

• ❌ Applying paste with your finger or brush creates air bubbles.
• ❌ Use too much paste - the excess will be squeezed onto the board and can short-circuit the contacts.
• ❌ Smearing paste on the surface disrupts its structure.

For liquid metal pastes (for example, Coollaboratory Liquid Ultra) the rules are different:

• 🔹 Apply thin layer (paper thickness) using a brush or spatula.
• 🔹 Required preliminary protection contacts around the chip (for example, with tape Kapton).
• 🔹 Not compatible with aluminum radiators (copper only!).

Assembling a laptop and turning it on for the first time: what to check

After applying thermal paste, reassemble the laptop in reverse order. Here are the key points:

• 🔩Tighten the cooling system screws criss-crossso that the radiator sits evenly. Do not overtighten - this may deform the board!
• 🔌 Connect cables before fixation - this makes it easier to correct them if the connector is not seated completely.
• 📋 Check if there are any left extra screws - everyone should be in their place.

When you turn it on for the first time:

1. Start your laptop and check immediately Are the fans spinning?. If not, turn it off immediately and check the cooler connection.
2. Install HWMonitor or ThrottleStop and run a stress test (eg Prime95 for CPU or FurMark for GPU).
3. Compare the temperatures with the initial ones (before replacement). Good result - reduction by 10-20°C under load.

⚠️ Attention: If after replacing the thermal paste the temperatures increased or the laptop became switch off more oftenThe heatsink probably doesn't fit tightly to the chip. Disassemble the device and check:

• Isn't it excess paste along the edges (they may interfere with the pressure).
• Isn't it deformed? heat pipe radiator
• Is it correct thermal pads installed on memory chips.

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes that ruin all the work. Here are the top 5 mistakes and how to prevent them:

1. Using low-quality alcohol.

   Regular vodka or medical alcohol 70% leave greasy marks. Use only isopropyl alcohol 90%+ or specialized cleaners (Arctic Clean).

2. Uneven tightening of radiator screws.

   This leads to skewed and bad pressure. Tighten the screws in a crisscross pattern in 2-3 sets, gradually increasing the force.

3. Ignoring thermal pads.

   If the gaskets on the memory chips or VRM are dry, they necessarily needs to be replaced. Otherwise, these elements will overheat and throttle the processor.

4. Too much pasta.

   Excess is squeezed out beyond the edges of the chip and may close contacts on the board. For most CPUs, a drop with the diameter of 4-5 mm.

5. Work without an antistatic wrist strap.

   Static electricity can damage sensitive chips. If there is no bracelet, regularly touch a grounded object (for example, radiators).

If the laptop does not turn on after assembly, don't panic. In 90% of cases the problem is:

• 🔌 Unconnected power cable or power button.
• 🔋 Incorrectly installed RAM (check if it is completely seated in the slot).
• 🔩 Warped radiator (disassemble and tighten the screws again).

FAQ: answers to frequently asked questions

❓ How much thermal paste do you need for a laptop?

Sufficient for most laptops 1 gram thermal paste. This is enough for:

• Processor (CPU) - 0.1-0.2 g.
• Video chip (GPU) — 0.1-0.15 g.
• The rest goes to memory chips (if required).

Don’t skimp on quantity, but don’t apply “too much” either - excess will only do harm.

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

Technically yes, but not recommended. Thermal pastes for smartphones (for example, Arctic Silver 5) have lower thermal conductivity (5-7 W/mK) and dry faster. For laptops, it is better to choose compounds with an indicator 8+ W/mK.

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

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

• Silicone pastes (For example, Deepcool Z9) - once every 1.5-2 years.
• Metal oxide (Arctic MX-6) - once every 3-4 years.
• Liquid metal (Coollaboratory) - once every 5-7 years.

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

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

Possible causes and solutions:

1. Poor radiator pressure — disassemble the laptop and check that the screws are evenly tightened.
2. Excess paste — remove residues from the edges of the chip with a dry cloth.
3. Dried thermal pads - replace them with new ones (thickness 1-1.5 mm).
4. Dust in the radiator — clean it with compressed air or rinse it under running water (after complete disassembly).

❓ Is it possible to apply thermal paste to a used laptop if I don’t know what was there before?

Yes, but with caution:

• First completely remove the old paste alcohol.
• Check if there are traces on the chip liquid metal (grey shiny coating). If available, reuse only liquid metal paste.
• If the previous paste was silicone, you can apply any new one (except liquid metal).