Replacing thermal paste on a laptop: a detailed guide with nuances for different models

Thermal paste is an invisible but critical component of any laptop, on which the stability of the processor and video card depends. Over time, it dries out, loses thermal conductivity, and instead of dissipating heat, it begins to act as an insulator. Result? Overheating, sudden shutdowns, decreased performance, and even failure of expensive chips. If your laptop begins to heat up more than usual, makes loud noise or slows down under load, it’s most likely time to update the thermal interface.

In this article we will analyze the entire process from A to Z: how to understand that it’s time to change the thermal paste, what material to choose for a specific model (ASUS ROG, Lenovo Legion, MacBook Pro etc.), how to safely disassemble a laptop and apply a new layer without the risk of damaging the board. We’ll also reveal the myths about “eternal” pastes and tell you why liquid metal is not always the best choice, and we will provide a checklist to check the result after replacement. If you have never held a screwdriver in your hands, but are ready to learn, this instruction is for you.

Signs that it's time to change the thermal paste

The laptop does not produce direct signals like the "Check Engine" light, but there are indirect symptoms that eloquently indicate problems with the heat sink. The first thing you should pay attention to is CPU temperature under load. If in games or when rendering video Intel Core i7 or AMD Ryzen 7 warm up to 95–100°C and higher, and the cooler operates at maximum speed, this is a sure sign: the thermal interface has exhausted its resource.

Other alarm bells:

• 🔥Laptop turns off spontaneously during resource-intensive tasks (overheating protection).
• 🎮 FPS drops in games 10–15 minutes after startup (throttling due to high temperatures).
• 💻 The case heats up so much that it is impossible to keep your hands on the keyboard or touchpad.
• 🔊 Cooler constantly runs at high speeds, even in idle mode.
• ⚡ The battery discharges faster than usual (overheating increases energy consumption).

To accurately diagnose the problem, use monitoring programs like HWMonitor, Core Temp or MSI Afterburner. Run a stress test (for example, in Prime95 or FurMark) and monitor temperatures. If under load the values exceed 85°C for Intel or 90°C for AMD - it's time to act.

⚠️ Attention: On laptops with NVIDIA Optimus (integrated + discrete graphics) overheating may manifest itself as artifacts on the screen or sudden driver errors (nvlddmkm on Windows). This is a signal that the thermal paste on the GPU chip also needs to be replaced.

Which thermal paste to choose: comparison of types and brands

The thermal interface market is huge, and it's easy to get confused about the specifications. Main parameter - thermal conductivity (measured in W/m·K). The higher this value, the more efficiently the paste removes heat. However, not everything is so simple: some materials require special application or are not compatible with all surfaces.

Thermal paste type	Thermal conductivity	Pros	Cons	Recommendations
Silicone (For example, Arctic MX-4)	8.5 W/m·K	✅ Does not conduct current ✅ Easy to apply ✅ Long service life (5–7 years)	❌ Average efficiency for top chips	For office laptops and average gaming models.
Based on liquid metal (For example, Thermal Grizzly Conductonaut)	73 W/m·K	✅ Maximum thermal conductivity ✅ Suitable for extreme overclocking	❌ Conducts electricity ❌ Difficult to apply ❌ May damage aluminum radiators	Only for experienced users and copper radiators!
Ceramic (For example, Noctua NT-H1)	8.9 W/m·K	✅ Does not dry out for a long time ✅ Safe for aluminum	❌ Requires careful application	A universal choice for most laptops.
Carbon (For example, Coollaboratory Liquid Ultra)	37.5 W/m·K	✅ High efficiency ✅ Does not conduct current	❌ Darling ❌ May leave traces	For enthusiasts and top gaming laptops.

For most users, the optimal choice is Arctic MX-6 or Noctua NT-H2. They offer a balance between price, effectiveness and safety. But liquid metal is strictly not recommended for laptops with aluminum radiators (for example, in most MacBook or Dell XPS), as it can cause corrosion and irreversibly damage the cooling system.

Preparing for replacement: tools and safety precautions

Before you begin, make sure you have everything you need. Minimum set of tools:

• ⚒️ Screwdriver set (cross, hex, sometimes Torx T5 or T6 for MacBook).
• 🧴 Thermal paste (selected from the table above).
• 🧻 Lint-free wipes And isopropyl alcohol (90%+ for cleaning).
• 🧲 Plastic card or mediator for careful removal of the cover.
• 🔍 Magnifying glass or flashlight (for inspection of small parts).
• 📦 Container for screws (so as not to lose small details).

Also prepare your work area: the table should be clean, well lit and free of static electricity (ideally, use an antistatic mat). Unplug your laptop, remove the battery (if removable) and wear an antistatic wrist strap (or regularly touch a grounded metal object to relieve static).

⚠️ Attention: In laptops Apple MacBook (2016 and newer) the battery is often glued to the case. An attempt to remove it without experience may lead to rupture of the cables or fire! In such cases, it is better to contact the service.

If this is your first time disassembling a laptop, take photos of each stage - this will help to put everything back together correctly. Pay special attention to:

• 🔌 The location of the trains (they are fragile and break easily!).
• 🔩 Screw length - laptops often use screws of different lengths for different places.
• 🖥️ The order of disconnecting the cooler (sometimes you must first unscrew it from the radiator).

Unplugged the laptop and removed the battery |

Prepared antistatic protection|

I photographed the original arrangement of the parts|

I checked the screws with a magnet (so as not to lose them)|

Prepared isopropyl alcohol and wipes -->

Step-by-step instructions: how to remove old thermal paste

Once the laptop is disassembled and you have access to the cooling system, proceed carefully. First rule: do not touch the contacts on the motherboard - even a small static discharge can damage it.

Cleaning algorithm:

1. Remove the radiator. It is usually secured with 3-4 screws at the corners. Unscrew them diagonallyto avoid skew. If the radiator is stuck, do not yank it - gently rock it from side to side.
2. Remove old paste. Use a plastic card or wooden stick to scrape off the base layer. Next, dampen a lint-free wipe with isopropyl alcohol and wipe the surface of the CPU and GPU until all residue is removed. Don't use cotton swabs - they leave fibers!
3. Clean the radiator. Dried paste may also remain on its base. Wipe it with alcohol, then dry the surface (you can use a hair dryer in cold air).
4. Check thermal pads. If they become hard or crumble, they also need to be replaced. New gaskets can be cut from a sheet of thermal pad (for example, Fujipoly).

Pay special attention cleanliness of contacts. Even microscopic particles of dust or old paste can impair heat transfer. If there are traces of corrosion on the processor or video card (green coating), this is a sign of moisture penetration - in this case, it is better to contact a service to diagnose the board.

What to do if the radiator screws cannot be unscrewed?

If the screw is “slipped” or does not give in, do not apply force - this way you risk stripping the thread. Try:

1. Use a screwdriver with a magnetic tip.

2. Apply a little WD-40 and wait 5-10 minutes.

3. Apply a rubber band between the screwdriver and the screw for better grip.

If all else fails, contact service so as not to damage the board.

Applying new thermal paste: technique and mistakes

The most important stage is applying a fresh thermal interface. It is not the quantity that is important here, but layer uniformity. Too much paste will lead to it being squeezed out of the edges of the chip, too little will lead to air bubbles and poor heat dissipation.

Optimal application methods:

• 🟡 "Pea" (for square processors): pea-sized drop (4–5 mm) to the center of the chip. With radiator pressure, the paste will be evenly distributed.
• 🔵 "Line" (for narrow chips, e.g. M1/M2 in MacBook): a thin stripe in the center.
• ⚪ "Cross" (for large processors, e.g. Intel Core i9-13900H): two perpendicular lines.

General rules:

• ❌ Do not smear the paste with your finger or card - this creates micro air bubbles.
• ✅ For liquid metal use thin layer (literally “rub” it over the surface with a plastic card).
• ⚠️ Do not apply paste to contacts around the chip - this may cause a short circuit!

After application, carefully reinstall the radiator and tighten the screws crosswiseto ensure even pressure. Do not overtighten - this may deform the board!

Assembling the laptop and checking the result

Once the thermal paste has been applied, all that remains is to reassemble the laptop in reverse order. The main thing here is not to rush and pay attention to the little things:

• 🔌 Connect all cables until the cover is finally fixed.
• 🔩 Tighten the screws with sufficient force to secure them, but do not overtighten.
• 🖥️ Before turning on, check if there are any foreign objects (screws, napkins) left inside.

After assembly, turn on the laptop and immediately check:

1. Idle temperatures. For Intel norm - 35–50°C, for AMD — 40–55°C.
2. Temperatures under load. Run a stress test (Prime95 or Cinebench) and monitor the indicators. It is optimal if they do not exceed 75–85°C.
3. Cooler noise. It should become quieter and the speed should be lower than before the replacement.

If temperatures remain high, possible reasons:

• 🔴 Not enough thermal paste (re-disassemble and apply a new layer).
• 🔴 Poor contact between the radiator and the chip (check the evenness of the surfaces).
• 🔴 Cooling system clogged with dust (clean the cooler and radiator with compressed air).

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes that ruin all the work. Here are the most common:

1. Using low-quality thermal paste.

   Cheap pastes (for example, KPT-8) dry out quickly and can make the situation worse. Invest in proven brands.

2. Uneven tightening of radiator screws.

   This leads to misalignment and poor contact. Always tighten the screws diagonally, in 2–3 approaches.

3. Thermal paste gets on the contacts.

   It is especially dangerous for liquid metal - it conducts current and can short-circuit the board. Always clean up excess with alcohol.

4. Ignoring thermal pads.

   If the gaskets on the memory chips or VRM are dry, they also need to be replaced. Otherwise, these components will overheat.

5. Assembly with unconnected cables.

   Check all connectors twice - especially the keyboard and touchpad cables.

Another common mistake is underestimation of dust. If the radiator is clogged with dust, even new thermal paste will not save you from overheating. Clean it up compressed air (spray) or a soft brush, and then wipe with alcohol.

⚠️ Attention: In laptops with soldered graphics (For example, NVIDIA GTX/RTX in gaming laptops) overheating of the GPU can lead to the chip detaching from the board. If after replacing the paste the GPU temperatures remain higher 90°C, this is a reason for diagnostics in the service - it may require re-soldering.

FAQ: answers to popular questions

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

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

• 💻 Office laptops (light load): once every 3–4 years.
• 🎮 Gaming laptops (intense load): once every 1–2 years.
• 🔥 Laptops with liquid metal: once every 5+ years (if applied correctly).

Signs for early replacement: temperature rise by 10°C+ compared to the "new" state.

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

Yes, but with reservations:

• ✅ Pastes for PC (for example, Arctic MX-6) are also suitable for laptops.
• ❌ Avoid too thick pastes (for example, Coollaboratory Liquid Pro) - they may not be distributed evenly under weak pressure from the laptop's heat sink.
• ⚠️ For MacBook Do not use pastes with metal particles - they can damage the aluminum housing.

❓ 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: disassemble the laptop and reapply it (see section on application techniques).
2. Poor radiator contact: check that it fits evenly to the chip. New thermal pads may be needed.
3. Forgot to connect the cooler: Make sure the fan spins when turned on.
4. Dust in the radiator: Clean it with compressed air.

If the problem persists, check the temperatures all chips (CPU, GPU, chipset) using AIDA64.

❓ Do I need to change thermal paste in a new laptop?

Usually no, but there are exceptions:

• ✅ Budget models (For example, Lenovo IdeaPad, Acer Aspire) often save on the thermal interface - replacement can reduce temperatures by 5–10°C.
• ✅ Gaming laptops with powerful chips (for example, ASUS ROG Strix with RTX 4080) are sometimes supplied with sub-optimal paste application.
• ❌ MacBook and premium ultrabooks (for example, Dell XPS) usually do not require replacement at first 2–3 years.

If you are not sure, check the temperatures under load. If they are normal, you should not touch the factory paste.

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

Technically yes, but with caution:

• 🧈 Toothpaste, honey, Vaseline: absolutely not! They do not conduct heat and can damage electronics.
• 🧊 Hot melt adhesive: Only suitable for permanent fixation heatsinks (for example, in consoles), but not for processors.
• 🪨 Powdered diamond or graphite: Experimental solutions requiring special surface preparation.

It's better not to take risks and use certified thermal interfaces.