Replacing thermal paste on a laptop: when is it needed, how to do it correctly and not break the equipment

Laptop overheating is one of the most common causes of slow performance, sudden shutdowns, and even component failure. Most often the culprit is dried out or poor quality thermal paste - a special composition that removes heat from the processor and graphics chip to the radiator. Over time, it loses its properties: it becomes hard, cracks, or simply evaporates, leaving microgaps between surfaces.

Many users are afraid to change thermal paste themselves for fear of damaging fragile parts or violating the warranty. However, with the right approach, the procedure is no more complicated than cleaning the keyboard - the main thing is to know what pasta to choose, how to carefully disassemble the body and evenly apply a new layer. In this article we will analyze the entire process from A to Z: from diagnosing overheating to final testing, and also reveal myths about “eternal” thermal pastes and the dangers of liquid metal for beginners.

Signs that it's time to change the thermal paste

A laptop doesn't always signal cooling problems in obvious ways. Sometimes symptoms are disguised as viruses, outdated software, or battery wear. Here are the key signs that directly indicate the need to replace thermal paste:

• 🔥 Sudden shutdowns while gaming, rendering or working with "heavy" programs (for example, Adobe Premiere, AutoCAD). This triggers overheating protection.
• 💨 Constantly running fan at maximum speed, even with minimal load (for example, when watching a video in a browser).
• 📉 CPU throttling - when the CPU frequency is artificially reduced due to high temperature (checked in HWMonitor or Core Temp).
• 🖥️ Hot case in the keyboard area (especially on the left, where the processor is usually located) or below, near the ventilation grilles.

If you observe at least 2-3 items from the list, the probability of a problem with thermal paste is 80%. But before disassembling the laptop, it is worth ruling out other reasons:

• 🧹 Dusty radiators — sometimes it is enough to clean the cooling system with compressed air.
• 🔋 Dried thermal pad on memory chips or VRM (less common, but also affects the temperature).
• 🔄 Cooler malfunction — check whether the fan is spinning under load (you can listen or hold a sheet of paper to the grille).

⚠️ Attention: On laptops Apple MacBook (especially 2016–2020 models) overheating is often associated not with thermal paste, but with defective thermal interface between the chip and the heatsink. In this case, re-soldering is required rather than replacing the paste.

For accurate diagnostics, use monitoring utilities:

Program	What does it show	Normal values (under load)
HWMonitor	CPU/GPU temperature, voltage, cooler speed	CPU: up to 85°C, GPU: up to 90°C
Core Temp	Temperature of each processor core	The difference between the cores is no more than 10°C
ThrottleStop	Throttling and power limits	No frequency drops under load
GPU-Z	Temperature and video card load	Maximum 85–90°C in games

If the temperature under load exceeds the norm by 15–20°C, and the fan is running low, it’s time to act. But first you need to choose the right thermal paste.

Which thermal paste to choose: 2026 rating

The thermal interface market has changed greatly in recent years: new compositions with nanoparticles, liquid metals for extreme cooling, and even pastes with a “memory effect” have appeared. However, not all of them are suitable for laptops. Here are the key selection criteria:

• 🔬 Thermal conductivity - minimum 8 W/mK for modern processors (Intel Core i7/i9, AMD Ryzen 7/9).
• ⏳ Service life — a high-quality paste should last 3–5 years without losing its properties.
• 💧 Consistency - not too liquid (so as not to spread) and not too thick (so as to be easy to apply).
• ⚡ Electrical conductivity — for beginners it is better to avoid liquid metal (Thermal Grizzly Conductonaut), since it can short-circuit the contacts if applied inaccurately.

Here are the top 5 thermal pastes for laptops for 2026, tested in practice:

Model	Thermal conductivity	Pros	Cons	Price (per 1 g)
Thermal Grizzly Kryonaut	12.5 W/mK	Best performance, long service life	Requires running-in (200 hours), high price	~800 ₽
Noctua NT-H2	8.9 W/mK	Universal, non-conductive, easy to apply	Average thermal conductivity	~500 ₽
Arctic MX-6	11.0 W/mK	No break-in required, safe for aluminum	May dry out a little after 2 years	~400 ₽
Coollaboratory Liquid Ultra	38.4 W/mK	Record thermal conductivity, suitable for extreme cooling	Liquid metal is dangerous for beginners!	~1200 ₽
DeepCool Z9	11.2 W/mK	Budget alternative to Kryonaut, good stability	Difficult to find in stores	~350 ₽

For most laptops, the best choice is Arctic MX-6 or Noctua NT-H2. They are safe, easy to apply and do not require special skills. Liquid metal (Coollaboratory or Thermal Grizzly Conductonaut) should be used only if you are confident in your abilities and are prepared to risk a short circuit if applied carelessly.

⚠️ Attention: On laptops with aluminum radiators (For example, MacBook Pro or some ASUS ZenBook) liquid metal can cause corrosion! In this case, use only silicone-based pastes.

Also note thermal pads - they often forget to change them, although they also dry out. For laptops, thick pads are suitable 0.5–1.5 mm with thermal conductivity not lower 6 W/mK (For example, Thermalright Odin or Arctic Thermal Pad).

Preparing for replacement: tools and disassembling the laptop

Before you start replacing thermal paste, you need to prepare your work area and tools. Here's what you'll need:

• ⚒️ Screwdriver set (cross PH00, straight SL1.5, sometimes hexagon for Dell XPS or HP Spectre).
• 🧴 Thermal paste (selected from the table above) + thermal pads (if replacement is required).
• 🧻 Isopropyl alcohol (90% or higher) and lint-free cleaning wipes.
• 📦 Plastic spatulas (mediator) for carefully prying up the latches.
• 🔍 Magnifying glass or flashlight — many screws on laptops are tiny and hard to see.
• 📱 Phone for filming — take photographs of each stage of disassembly so as not to forget what was connected where.

Now about the most difficult part - disassembling the laptop. Each manufacturer has its own characteristics:

• 🍎 MacBook - a special screwdriver is required P5 Pentalobe for the bottom cover. The battery is glued, you need to carefully pry it off with a plastic spatula.
• 🖥️ Lenovo ThinkPad - There are often hidden screws under rubber feet or labels.
• 💻 ASUS ROG - You may need to remove the keyboard to access the cooling system.
• 📄 HP Pavilion/Omen — the bottom cover is usually held on by latches, which are easy to break if opened carelessly.

General disassembly algorithm:

1. Turn off the laptop, unplug the charger and remove the battery (if possible without disassembly).
2. Turn the device over and remove all screws on the bottom cover. Please note: they may vary in length!
3. Using a plastic spatula, carefully pry the lid off, starting at the corner. If it does not give in, check that all the screws are unscrewed.
4. Disconnect the cables (battery, touchpad, keyboard) - pull the connector, not the wires!
5. Remove the cooling system (radiator + cooler). It can be secured with screws or latches.

⚠️ Attention: On some laptops (eg MSI GS66 or Acer Predator) the heatsink is glued to the GPU with a thermal pad. Do not try to tear it off by force - warm it up with a hair dryer 60–70°C for 2-3 minutes until the glue softens.

After removing the heatsink, you will see the processor and video card (if it is discrete). Old thermal paste will most likely be dry and tattered - it needs to be completely removed.

Removing old thermal paste and cleaning surfaces

This is the most critical stage - the quality of cleaning determines how well the heat will be removed after replacement. Here are the step-by-step instructions:

1. Remove any remaining old paste from the processor, video card and radiator. Use plastic spatula or soft brush — metal objects can scratch the surface.
2. Wipe surfaces with a cloth soaked in isopropyl alcohol. Work from the center to the edges to avoid smearing the dirt.
3. For stubborn stains (for example, dried pasta Kryonaut) use cotton swab, soaked in alcohol. Don't press too hard!
4. Allow surfaces to dry completely (5–10 minutes). There should be no moisture - it impairs thermal conductivity.

Pay special attention to the following points:

• 🔍 Microcracks on the processor chip - if they are present, this may indicate previous overheating. In this case, it is worth checking the laptop for stability after replacing the paste.
• 🧲 Magnetic dust — if a lot of metal shavings have accumulated on the radiator, this is a sign of wear on the cooler. It should also be cleaned or replaced.
• 📏 Surface evenness — attach a ruler to the processor crystal and heatsink. If there are gaps more 0.1 mm, grinding may be required (but this is a task for the service center).

For cleaning thermal pads (if they are in good condition and not cracked) you can use the same alcohol. However, if the gaskets have lost their elasticity or have delaminated, it is better to replace them with new ones. Match the thickness of the new gaskets to the old ones or measure them with a caliper.

After cleaning, do not touch the surfaces of the processor and heatsink with your hands - oil from the skin impairs heat transfer. If you accidentally touch it, wipe it with alcohol again.

What to do if thermal paste gets on the contacts?

If thermal paste (especially electrically conductive, like liquid metal) gets on the contacts around the processor:

1. Immediately unplug your laptop and remove the battery.

2. Wipe contacts with alcohol and let dry for 10–15 minutes.

3. Check the resistance between the contacts with a multimeter (should be infinite).

4. If the paste has managed to close the circuits, the laptop may not turn on. In this case, professional cleaning of the board is required.

Applying new thermal paste: technique and mistakes

Now let's move on to the most important thing - applying new thermal paste. Here, many make critical mistakes that ruin all efforts. Here correct technique:

1. Dosage — enough for a laptop processor peas with a diameter of 4–5 mm (about 0.1 g). For a video card - a little more (5–6 mm).
2. Application method:
   • For round crystals (For example, Intel Core i5/i7) — point to center.
   • For rectangular chips (AMD Ryzen, NVIDIA GPU) — thin stripe in the middle.

Leveling — no need to spread the paste with your finger or spatula! It will be evenly distributed when tightening the radiator.

Securing the radiator - tighten the screws criss-cross in 2-3 approaches to avoid distortion. Tightening torque - 0.5–0.8 Nm (do not overtighten!).

Typical errors that spoil the result:

• 🎨 Too much pasta — the excess will be squeezed out around the edges and may get on the contacts.
• 🧊 Too little pasta - air gaps will remain, and heat transfer will deteriorate.
• 🔄 Uneven tightening of screws - leads to skew of the radiator and incomplete fit.
• 🧴 Using expired toothpaste — over time, it loses its properties even in closed packaging.

For liquid metal (Coollaboratory Liquid Ultra) the rules are different:

• Apply thin layer (literally a drop smeared on the surface).
• Requires mandatory isolation contacts around the chip (for example, Kapton tape).
• Not compatible with aluminum radiators (copper only!).

After applying the paste and assembling the heatsink, do not turn on the laptop immediately. Let the paste sit for a while 1–2 hours (this is especially important for Kryonaut and liquid metal).

Laptop assembly and testing

Assembly is the reverse process of disassembly, but with some nuances. Here's what you should pay attention to:

• 🔩 Screws - tighten them in the same order as you unscrewed them. Don't overtighten! Be especially careful with plastic stands (e.g. MacBook Air).
• 🔌 Loops — check that they are connected until they click. A skewed cable can lead to artifacts on the screen or a non-functional touchpad.
• 🔋 Battery — if you disconnected it, make sure that the connector is seated tightly. Sometimes it takes a little pressure.
• 💨 Cooler — after assembly, check that the fan rotates freely (you can blow lightly into the grille).

After assembly, do not immediately plug the laptop into a power outlet. First check:

1. Connect the charger and see if the power indicator lights up.
2. Press the power button - if the laptop starts, but the screen does not turn on, check the connection of the matrix cable.
3. If everything works, run a stress test (more on this below).

To test temperatures, use the same utilities as for diagnostics (HWMonitor, Prime95, FurMark). This is what is considered normal after replacing the paste:

Component	Load	Normal temperature	Critical temperature
Processor (Intel/AMD)	Stress test (Prime95)	70–85°C	>95°C
Video card (NVIDIA/AMD)	Games (Cyberpunk 2077)	75–85°C	>95°C
Processor	Simple (desktop)	40–55°C	>65°C
Video card	Simple	35–50°C	>60°C

If temperatures remain high (for example, the processor heats up to 90°C+ in a stress test), the following problems are possible:

• 🔄 Poor fit of the radiator — check that the screws are tightened evenly.
• 🧴 Poor quality pasta - some cheap compounds can have the opposite effect.
• 💨 Radiator clogged with dust — even after replacing the paste, a layer of dust interferes with the heat sink.
• 🔧 Wear of thermal pads - If they have not been replaced, heat from the memory chips or VRM can heat up the processor.

If the laptop does not turn on after assembly:

• Check your connection battery and charging.
• Make sure RAM inserted until it clicks.
• Try resetting BIOS (remove the battery for 30 seconds if it is removable).

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes when replacing thermal paste. Here are the most common ones and how to prevent them:

• 🔧 Lost screws - Always put them in separate containers or take photographs of the arrangement. Screws from Lenovo ThinkPad And Dell Latitude often look the same but are different lengths!
• 💥 Broken latches — plastic clips on the radiator or case are fragile. Don't push them too hard.
• 🔥 Overheating after replacement — if temperatures have not dropped, check:
  • Evenness of the radiator fit (can be checked by the imprint of the paste on a napkin after removal).
  • Quality of thermal pads on VRM and memory chips.
  • Cooler operation (may be clogged with dust or faulty).
• 🔌 Short circuit — if you used liquid metal, make sure that it did not get on the contacts. Signs of a short circuit: the laptop does not turn on, or turns on and immediately turns off.
• 📱 Damaged cable — if the screen or touchpad does not work after assembly, check the connections of the cables. Do not pull on the wires, only the connector!

Pay special attention to laptops with soldered memory (For example, MacBook Pro 2018+ or ASUS Zephyrus). They often have the following problems:

• 🔥 Overheating of memory chips — if thermal pads are not replaced, they can heat up to 100°C+, which leads to throttling.
• 🔧 Difficulty in disassembling - some models require special tools to remove the screen (for example, iFixit Jimmy).
• 💻 Resetting BIOS Settings - may reset after disconnecting the battery TDP processor, causing it to run slower. Restore settings in BIOS.

If you doubt your abilities, it is better to contact the service. However, most laptops (except MacBook and some ultrabooks) can be serviced yourself if you act carefully.

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 2–3 years.
• Metal-containing pastes (Kryonaut, Thermal Grizzly) - once every 3–5 years.
• Liquid metal - once every 5–7 years (but requires careful application).

If the laptop is used in a dusty room or often works under load (games, rendering), replacement should be done more often.

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

Yes, but with reservations:

• Thermal paste for PCs and laptops does not differ in composition, but in laptops it’s more important dosage - you need less of it.
• For laptops it is better to choose pastes with low viscosityso that they are evenly distributed at low radiator pressure.
• Avoid pastes that are too thick (eg. Cooler Master MasterGel) - they may not "spread" properly.

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

Possible causes and solutions:

1. Plo