Replacing thermal paste in a laptop: a complete guide 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 “suffocate” under load if you do not pay attention to the cooling system. The reason for this is dried thermal paste, which loses its thermal conductivity properties and turns into a hard crust between the processor and the heatsink.

Replacing thermal paste in a laptop is a task that you can do yourself, saving on a service center. But accuracy is important here: one wrong move can lead to damage to the printed circuit board or connectors. In this article we will look at all about the replacement process — from choosing the right paste to testing the result, and we will also reveal myths about “eternal” thermal interfaces and dangerous mistakes of beginners.

Signs that it's time to change the thermal paste

A laptop does not always indicate problems with thermal paste with obvious “symptoms”. Sometimes overheating is disguised as other faults. Here are the key signs to look out for:

• 🔥 Sudden rise in temperature under load: if in games or rendering the CPU/GPU heats up to 95–100°C (check in HWMonitor or Core Temp), this is an alarming signal.
• 💻 Random shutdowns during resource-intensive tasks: the laptop turns off without a BSOD (blue screen), as if it had been pulled out of the socket.
• 🌀 Throttling (reduction of frequencies): The processor or graphics card is artificially slowed down to avoid overheating. B ThrottleStop This can be seen from the drop in the multiplier.
• 🔊 Constant cooler noise at maximum speed, even at minimum load.

If you notice at least two of these symptoms, the likelihood of a problem with the thermal paste or cooling system is greater than 80%. But before disassembling the laptop, check other possible reasons:

• 🧹 Radiator dustiness (cleaning may return temperatures to normal).
• 🔄 Cooler malfunction (check if it spins under load).
• 🔋 Power management problems (update BIOS and chipset drivers).

⚠️ Attention: Don't confuse overheating due to thermal paste with degradation of thermal pads on GPU memory chips. In the latter case, they may need to be replaced, and this is a more complicated procedure.

Choosing thermal paste: which is better for a laptop in 2026

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

• 🌡️ Thermal conductivity: optimal range - 8–12 W/mK. Higher values (eg. 15+ W/mK at Kingpin KPx) often require special application and do not make a noticeable difference in laptops.
• ⏳ Durability: metal-based pastes (silver, copper) last longer than silicone ones, but can be electrically conductive.
• 💧 Consistency: for laptops, thick pastes that do not spread when the device is held vertically are better.

Let's compare popular options in the table:

Model	Thermal conductivity	Type	Pros	Cons	Price (300–500 mg)
Arctic MX-6	11 W/mK	Silicone	Non-conductive, long service life (8 years)	Requires “grinding in” (200 hours for maximum effectiveness)	~800 ₽
Thermal Grizzly Kryonaut	12.5 W/mK	Nanoceramics	High efficiency, suitable for extreme overclocking	Dries in 2-3 years, dear	~1 500 ₽
Noctua NT-H2	8.9 W/mK	Hybrid	Does not require lapping, easy to apply	Average thermal conductivity	~1 000 ₽
Coollaboratory Liquid Ultra	38.4 W/mK	Liquid metal	Record thermal conductivity, does not dry out	Electrically conductive, difficult to apply, requires component protection	~2 500 ₽

For most laptops, the best choice is Arctic MX-6 or Noctua NT-H2. They are safe, durable and do not require professional skills when applied. Liquid metal pastes (Coollaboratory, Thermal Grizzly Conductonaut) are only recommended for experienced users for extreme cooling (e.g. ASUS ROG Zephyrus with RTX 4090).

⚠️ Attention: If you are using liquid metal, be sure to insulate the contacts around the processor Kapton tape or Thermal Grizzly Minus Pad 8. A drop on the board = short circuit.

Preparing for replacement: tools and safety precautions

Before you begin disassembly, prepare your work area and tools. You will need:

• ⚒️ Screwdriver set: cross (PH00, PH0) and flat for laptops as well Torx T5/T6 (for some models Dell or HP).
• 🧴 Thermal paste (selected in advance) + alcohol solution (isopropyl alcohol 90%+ or Arctic Clean).
• 🧻 Lint-free wipes or coffee filters for cleaning.
• 🔍 Magnifying glass or flashlight for inspection of small parts.
• 📦 Containers for screws (use magnetic mats or labeled bags).

Also prepare antistatic wrist strap or regularly touch the laptop's metal frame (literally "ground yourself") to avoid static discharge. Ranks in 100–200 V may damage memory chips or controllers!

Disconnected the laptop from the network and removed the battery (if removable)

I photographed the location of the screws and connectors.

Prepared the work surface (clean table, good lighting)

Checked the presence of all tools and consumables

I downloaded the disassembly manual for my model (on iFixit or YouTube)

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If this is your first time disassembling a laptop, find a video guide specifically for your model. For example, disassembly MacBook Pro And Acer Nitro 5 are radically different: in the first case you will have to deal with glue and special latches, and in the second you just need to unscrew the screws.

Where can I download official service manuals?

Official disassembly guides are often hidden behind paid subscriptions, but can be found for free:

1. On the website iFixit (there are step-by-step instructions with photos for most models).

2. In the archives ManualsLib (search by exact model name, for example, “Lenovo ThinkPad T14 Gen 2 Service Manual»).

3. On enthusiast forums (for example, NotebookReview or Reddit/r/laptops).

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

The disassembly process varies depending on the model, but the general sequence of actions is as follows:

1. Turn off the power and remove the battery (if it is removable). B MacBook or HP Spectre The battery is often stuck - in this case, disconnect the battery cable from the motherboard first of all.
2. Remove the bottom cover. In most laptops it is secured with screws, but in ultrabooks (for example, Dell XPS 13) there may be hidden latches. Use plastic spatulato avoid scratches.
3. Disconnect the cables (touchpad, keyboard, speakers). Carefully lift up the connector clamps with a flathead screwdriver - do not pull on the wires!
4. Remove the cooling system. It is usually secured with 3-6 screws to the motherboard. After unscrewing, gently rock the radiator from side to side - the thermal paste could “stick.”

At this stage you will see the processor and video card chip (if it is discrete). Don't touch the contacts on the motherboard and do not drop screws on them! Pay attention to the condition of the old thermal paste:

• 🟤 Yellow or gray color - the paste has dried out and lost its properties.
• 🖤 Black spots — overheating is possible due to poor contact.
• 💨 Dust between the radiator fins - additional cleaning required.

Now you can start cleaning. Use lint-free cloth, soaked in isopropyl alcohol to remove old paste from the processor and heatsink. Don’t skimp on alcohol—remnants of the old paste will reduce the effectiveness of the new one. For hard-to-reach places (for example, between chips VRM) use cotton swabs.

Applying thermal paste: technique and common mistakes

It would seem that what could go wrong when applying the paste? In practice, even here, many make critical mistakes that nullify all efforts. Basic rules:

• 🎨 Paste quantity: optimal volume - s pea (4–5 mm). Excess will lead to extrusion onto the board, too little will lead to air gaps.
• 🖌️ Application method:

  - For CPU (square/rectangular crystals) - center point or cross.

  - For GPU (chips with several small crystals) - thin layer over the entire surface (use a plastic card).

• ⚠️ Do not spread the paste with your finger or cloth - this creates micro-bubbles of air.

Let's take a closer look application methods for different processors:

Processor type	Recommended Method	Example (models)	Photo/diagram
Intel (up to 12th generation)	Center point	i7-10750H, i5-9300H	⬤
Intel 13th–14th generation (Raptor Lake)	Two points (per cluster)	i9-13900HX, i7-13700H	⬤ ⬤
AMD Ryzen (Zen 2/3/4)	Cross (thin lines)	Ryzen 9 5900HX, Ryzen 7 6800H	✖️
Apple M1/M2	Thin, uniform layer	MacBook Air M2, MacBook Pro 14" M1 Pro	▭

After applying the paste don't rush to assemble your laptop. Make sure that:

• The paste did not get on the resistors or capacitors around the processor.
• The radiator sits evenly, without distortions (otherwise the pressure will be distributed unevenly).
• All cooling system screws are tightened criss-cross (like the wheels of a car) to avoid deformation of the board.

⚠️ Attention: If you are using liquid metal, wait after applying 1–2 hours before turning on the laptop. This will allow the paste to be evenly distributed under the pressure of the radiator.

Assembling a laptop and testing the result

Assembly must take place in reverse order. Here are the key points to pay attention to:

• 🔌 Loops: Make sure all connectors are fully latched. An insufficiently inserted touchpad or keyboard cable can lead to their inoperability.
• 🔩 Screws: Don't overtighten them! Laptops often have plastic inserts that can crack.
• 🔋 Battery: if you disconnected its cable, connect it last, before closing the lid.

After assembly, turn on the laptop and check:

1. Idle temperatures: must be on 5–10°C lower than before replacement.
2. Temperatures under load: run Cinebench R23 or FurMark (for GPU). If the CPU temperature does not exceed 85°C, and GPU - 80°C, the replacement was successful.
3. Operation stability: No sudden shutdowns or throttling.

If temperatures remain high, possible reasons:

• 🔄 Poor contact between the heatsink and the processor (check if you forgot to remove the protective film from the thermal pads).
• 🌀 Not enough paste or air gaps.
• 💨 Radiator clogged with dust (if cleaning was not done, repeat the procedure).

Common mistakes and how to avoid them

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

• 🧴 Using expired or low-quality toothpaste. For example, Arctic MX-4 Once the tube is opened, it can be stored for no more than a year. Check the production date!
• 🔧 The radiator screws are tightened in the wrong order. This leads to uneven pressure and poor heat dissipation.
• 💦 Contacts with alcohol or paste. It is especially dangerous for laptops with open resistors (for example, MSI GS66).
• 🔥 Ignoring Thermal Pads. If they delaminate or harden, they also need to be replaced (suitable Thermal Grizzly Minus Pad 8 thick 1–1.5 mm).

Another common mistake is misdiagnosis. For example, a user changes thermal paste, but overheating remains, because the real reason was:

• 🔌 Faulty cooler (check if it spins at maximum speed under load).
• 🔋 Degraded battery, which heats up and warms the entire body.
• 🖥️ Poor contact in the power connector (relevant for laptops with external power supplies).

If after replacing the thermal paste the laptop becomes turn off immediately after turning on, possible reasons:

• Short circuit due to paste getting on the board.
• Unconnected power cable or battery.
• Damage to contacts during disassembly (for example, with a screwdriver).

FAQ: answers to frequently asked 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:

• Silicone pastes (Arctic MX-6, Noctua NT-H2) - once every 3–4 years.
• Metal-containing (Kryonaut, Kingpin KPx) - once every 2–3 years (dry faster).
• Liquid metal (Conductonaut) - once every 5–7 years, but requires caution.

If the laptop is used in dusty conditions or often works under high load (games, rendering), the interval is reduced by 30–50%.

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

Yes, but with reservations:

• 🔹 Pastes for PC (for example, Cooler Master MasterGel) often have a thinner consistency, which can lead to spreading when the laptop is held upright.
• 🔹 Critical in laptops durability - pastes with a short service life (1–2 years) will have to be changed more often.
• 🔹 For ultrabooks (Dell XPS, MacBook Air) it is better to choose pastes with low electrical conductivity, since the components are located very tightly.

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

Possible causes and solutions:

1. Incorrect application of paste:

   - Too little → add more (layer should be 0.1–0.3 mm after compression).

   - Too much → remove excess and reapply.

2. Poor radiator contact:

   - Check if there is any old thermal paste or protective film left on the thermal pads.

   - Make sure that the screws are tightened evenly (use a torque screwdriver with force 0.5–0.8 Nm).

3. Damage to thermal pads:

   - If they delaminate, replace them with new ones (Thermalright Odin or Fujipoly).

4. Forgot to connect the cooler:

   - Check if the fan rotates under load (you can hear or feel the air flow).

If the problem persists, return the old thermal paste and check the temperatures - it may not be the cause.

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

Yes, if:

• 🔹 GPU is loaded in games or rendering and reaches temperatures 90°C+.
• 🔹 The video card has separate radiator (relevant for RTX 30/40 series in gaming laptops).
• 🔹 The thermal pads on the GPU memory chips have dried out (this can be seen from the white coating).

To replace the paste on the GPU:

1. Remove the radiator (you may need to unsolder the tubes on some models).
2. Clean the video card chip and apply paste thin layer (method of “smearing” with a plastic card).
3. Replace thermal pads on memory chips (thickness 1–1.5 mm).

⚠️ In laptops with Max-Q design (for example RTX 3060 Max-Q) the video card is often soldered to the radiator via heat pipes - disassembling such systems requires experience.

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

Theoretically yes, but in practice this is fraught with problems:

• 🔹 Toothpaste: Contains abrasives that will scratch the surface of the processor. In a week it will dry out and turn into an insulator.
• 🔹 Vaseline, cream: do not conduct heat, oxidize quickly.
• 🔹 Aluminum foil: may close the contacts.
• 🔹 Hot melt adhesive: Not intended for processors (used for gluing heatsinks to memory chips).

The only alternative is thermal pads (For example, Thermalright TFX), but they are inferior to paste in terms of thermal conductivity and require precise selection of thickness.