Replacing thermal paste on a laptop processor: a step-by-step guide for beginners and experienced users

Overheating of the processor is one of the most common reasons for decreased performance and sudden shutdowns of a laptop. Even if your Lenovo ThinkPad, ASUS ROG or MacBook Pro It works flawlessly; over time, the factory thermal paste dries out, losing its thermal conductivity properties. Proper application of a new layer can reduce the temperature by 10–20°C, extending the life of the device and returning its former power.

In this article you will not find template advice, but specific recommendations on choosing thermal paste, disassembling a laptop (including models with a soldered radiator), application technique and diagnosing the result. We will analyze the mistakes that 90% of users make during the first replacement, and show how to avoid damage to the chip or motherboard. If you have never held a screwdriver in your hands, no problem: the instructions are adapted for beginners, but contain nuances that are also useful for experienced craftsmen.

Why thermal paste loses its properties and when to change it

Thermal paste is not just a “lubricant” between the processor and the heatsink, but composite material with microparticles of zinc oxide, silver or diamond dust, providing heat transfer. Over time it dries out due to:

• 🔥 Thermal aging — when heated above 80°C, the polymer base is destroyed, forming microcracks.
• ⚡ Electrostatic discharge — in cheap pastes, metal particles oxidize, reducing thermal conductivity.
• 💨 Solvent evaporation — the liquid fraction evaporates, leaving a dry residue that acts as an insulator.
• 🛠️ Mechanical displacement — when transporting a laptop or replacing a cooler, the paste may become “smeared”, forming air gaps.

You can determine that it’s time to change the thermal paste based on indirect signs:

• 📉 The laptop starts "throttle" (reduce processor frequency) even for light tasks - check the temperature in HWMonitor or Core Temp.
• 🔊 Cooler runs at maximum speed even in standby mode (for example, when watching YouTube).
• 💻 The laptop case heats up to 50°C and above in the keyboard area (especially for models Dell XPS or HP Pavilion with a thin body).
• 🚨 Happening spontaneous shutdowns under load (games, rendering, code compilation).

⚠️ Attention: If the processor temperature under load exceeds 95°C, and the laptop turns off 5-10 minutes after starting the game, this is critical signal. In this case, replacing the thermal paste should be accompanied by checking the cooling system for blockages and fan functionality. Ignoring the problem can lead to CPU chip detachment from the substrate!

Thermal paste life	Paste type	Signs of wear
1–2 years	Silicone (for example, KPT-8)	Drying, crust formation, temperature rises by 15–25°C
3–4 years	Metal-containing (for example, Arctic MX-6)	Particle oxidation, uneven layer, overheating by 10–15°C
5+ years	Liquid metal (for example, Thermal Grizzly Conductonaut)	Gallium decomposition, corrosion of the radiator copper substrate
6–8 years	Diamond (for example, Coollaboratory Liquid Ultra)	Crystallization, loss of plasticity, local overheating

Choosing thermal paste: what to buy for a laptop in 2026

The thermal interface market is overcrowded with products with inflated characteristics. Manufacturers often indicate thermal conductivity 10–15 W/mK, but in real conditions (taking into account radiator pressure and surface microrelief), the difference between budget and premium pastes is only 2–5°C. Here's what's really important when choosing:

• 🔬 Viscosity - liquid paste (for example, Noctua NT-H2) is easier to apply, but may “bleed” beyond the processor. Dense (for example, Gelid GC-Extreme) holds its shape, but requires more effort during application.
• ⚡ Electrical conductivity - metal-containing pastes (for example, Coollaboratory Liquid Pro) cannot be used on laptops with exposed contacts around the processor (risk of short circuit!).
• 🕒 "Exposure" time - some pastes (for example, Arctic MX-4) require 200 hours of operation to achieve maximum efficiency.
• 💰 Price/quality ratio — pastes for 1000+ rubles (for example, Thermal Grizzly Kryonaut) are justified only for extreme overclocking. Enough for office laptops DeepCool Z5 for 300 rubles.

For most laptops (including gaming laptops) MSI GE76 or Acer Predator) the optimal choice would be:

Laptop model	Recommended paste	Reason
Budget (Lenovo IdeaPad, HP 15)	Arctic MX-6 or Noctua NT-H1	Low price, easy application, does not require frequent replacement
Gaming (ASUS TUF, MSI GF63)	Thermal Grizzly Kryonaut or Coollaboratory Liquid MetalPad	High thermal conductivity (12–14 W/m K), resistance to high temperatures
Ultrabooks (MacBook Air, Xiaomi Mi Notebook)	Gelid GC-Extreme or Thermalright TFX	Thin layer, no risk of bleeding, compatible with low profile radiators
Old laptops (5+ years)	Coollaboratory Liquid Ultra (liquid metal)	Restores heat transfer on worn surfaces, but requires care

⚠️ Attention: Liquid metal pastes (for example, Thermal Grizzly Conductonaut) cannot be applied to aluminum radiators! Gallium in their composition corrodes aluminum, leading to irreversible corrosion. Use only with copper radiators (check the markings or scratch the surface - copper has a reddish tint).

Preparing for replacement: tools and disassembling the laptop

Before you begin, make sure you have everything you need. Don't improvise with improvised means - this can result in damage to the components. Minimum set:

• ⚒️ Screwdriver set - cross PH00 (for most laptops), hexagon 1.5 mm (for MacBook), torx T5 (for Lenovo Legion).
• 🧴 Isopropyl alcohol 90%+ - for cleaning the processor and radiator. Regular rubbing alcohol or acetone will not work!
• 🧻 Lint-free wipes or coffee filters - to remove old toothpaste without scratching.
• 📏 Plastic card or spatula — for uniform distribution of the paste (metal objects are prohibited!).
• 🔍 Magnifying glass or flashlight - to see microcracks on the processor or paste residues in the corners.

Disassembling a laptop is the most critical step. There is no universal instruction, since the design depends on the model. However, general principles:

1. Disconnect the laptop from the network, remove the battery (if it is removable).
2. Remove the bottom cover by unscrewing all screws. Inspect them carefully—manufacturers often hide screws under legs or stickers.
3. Disconnect the cables (battery, touchpad, keyboard). Do not pull on the wires - only on the connectors!
4. Remove the cooling system. In some models (for example, ASUS Zephyrus) the radiator is secured with latches, in others (for example, MSI GS66) - screws with springs.

What if the screws do not come off?

If the screw is stuck or has a non-standard head (for example, Y00 in MacBook), do not apply force - this will rip off the spline. Use:

• 🔧 Screw extractor (sold in hardware stores).
• 🔥 Heating with a hairdryer (up to 60°C) - will expand the metal and weaken the thread.
• 💧 WD-40 - apply to the thread, wait 10 minutes, then try to unscrew again.

If all else fails, contact the service center.

Pay special attention radiator mounting. In laptops it is often fixed spring screws (screws with springs) that need to be unscrewed diagonallyto avoid skew. For example, the unscrewing order for 4 screws: 1 → 3 → 2 → 4.

Disconnect the laptop from the network and remove the battery|Take photographs of the location of the cables and screws|Prepare the work area (clean surface, good lighting)|Check the compatibility of the thermal paste with the radiator material|Have thermal paste, alcohol and wipes on hand-->

Step-by-step instructions: how to apply thermal paste to the processor

Now we move on to the most important stage. Mistakes here are costly: a layer of paste that is too thick impairs heat transfer, and a layer that is too thin leads to local overheating. Follow the algorithm:

1. Surface cleaning

   Remove old thermal paste from the processor and heatsink with a lint-free cloth soaked in isopropyl alcohol. Don't use cotton swabs - they leave lint! For dried residues you can use plastic spatula, but without pressure. The surface must be absolutely clean and dry (check at an angle to see if there are any streaks left).

2. Laptop CPU Features

   Processors in laptops (for example, Intel Core i7-12700H or AMD Ryzen 9 6900HS) have non-flat surface — the crystal (die) can be recessed by 0.1–0.3 mm relative to the edges. Apply the paste only on crystal, and not on the entire metal cover! Otherwise, the excess will be squeezed out onto the motherboard.

3. Application technique

   The best method for laptops is - "drop" (pea-sized dot). The droplet size depends on the processor:

   • For 2-core CPUs (for example, Intel Celeron) — 3–4 mm.
   • For 4-6 cores (for example, Intel i5-1135G7) — 4–5 mm.
   • For 8+ cores (e.g. AMD Ryzen 9 5900HX) — 5–6 mm.

Do not smear the paste with your finger or card - the pressure of the radiator will distribute it evenly when tightening the screws.

Radiator installation

Carefully lower the heatsink onto the processor, aligning the fasteners. Tighten the screws diagonally in 2-3 approaches to avoid distortion. Tightening force - 0.5–0.8 Nm (for spring propellers, “light force” is sufficient). Tightening can damage the processor crystal!

For clarity, a comparison of application methods and their effectiveness:

Method	Pros	Cons	Suitable for
Drop (pea-sized dot)	Minimal risk of excess, even distribution	Requires accurate calculation of droplet size	All laptops
Line method	Good for elongated processors (eg. AMD Ryzen 7 4800H)	There may be an air gap around the edges.	Gaming laptops with large chips
Cross (X method)	Suitable for square processors	Difficult to control layer thickness	Old laptops (before 2015)
Map smearing	Visual control of layer thickness	High risk of air bubbles	For advanced users only

⚠️ Attention: If you are using liquid metal paste, apply it only for processor, and on the radiator - a thin layer KPT-8 or other silicone paste. This will prevent corrosion of the copper/aluminium. After applying liquid metal do not turn on the laptop for 12 hours - let the paste polymerize.

Assembling the laptop and checking the result

After applying thermal paste, reassemble the laptop in reverse order. Triple check:

• 🔌 All cables are connected (especially the keyboard and touchpad cable!).
• 🔩 All screws are tightened (but not tightened).
• 💨 The fan spins freely (blow it with compressed air if there is dust).

For testing:

1. Turn on your laptop and check that it boots without errors.
2. Run a stress test (eg Prime95 or Cinebench R23) and monitor temperatures in HWInfo:
   • 🟢 Norm: up to 85°C under load (for gaming processors - up to 90°C).
   • 🟡 Warning: 85–95°C - check the quality of paste application or clean the cooler.
   • 🔴 Critical: above 95°C - disassemble the laptop and repeat the procedure.

Listen to the cooler: if it constantly working at maximum or makes a grinding noise - perhaps the radiator is not seated tightly.

If temperatures remain high, the reasons may be:

Problem	Reason	Solution
The temperature has not changed	The old paste is not completely removed or the new layer is too thin	Disassemble the laptop, repeat cleaning and application
The temperature has risen	Paste layer too thick or air bubbles	Apply the paste in a drop, without smearing.
Laptop turns off after 5–10 minutes	Short circuit due to paste getting on the contacts	Clean the motherboard with alcohol, check the circuits with a multimeter
Cooler won't turn on	The fan connector is not connected or the cable is damaged	Check the connection of the cooler to the motherboard

Common mistakes and how to avoid them

Even experienced users make mistakes when replacing thermal paste. Here TOP-5 missesthat lead to damage to the laptop:

1. Using inappropriate tools

   Metal spatulas, knives or screwdrivers scratch the surface of the processor, creating microcracks. Use only plastic cards or special spatulas!

2. Applying paste to a dirty surface

   Remains of old paste or dust reduce thermal conductivity by 30–40%. Always clean the CPU and heatsink two napkins: first remove the bulk, second (dry) polish until shiny.

3. Incorrectly tightened radiator

   Distortions lead to uneven pressure and local overheating. Tighten the screws in a criss-cross patternlike the wheels of a car. For spring screws, the force required is enough to compress the spring by 50%.

4. Ignoring Thermal Pads

   In laptops, thermal paste is applied not only to the CPU, but also to chipset (For example, Intel PCH) and video memory (in discrete video cards). If you do not replace the thermal pads on these elements, they will overheat, which will lead to artifacts on the screen or errors in the USB ports.

5. Saving on thermal paste

   Cheap pastes (for example, KPT-8) after 6 months they lose their properties, and the procedure has to be repeated. Invest in quality material - it will save time and nerves.

Special attention - laptops with heatsink soldering (For example, Apple MacBook Pro 2016–2020 or Dell XPS 15). In them, the thermal paste is integrated into the heat pipes, and replacement requires:

• 🔥 Infrared station for heating and removing the radiator.
• 🛠️ Special stencil for applying paste (since the chip and radiator are one-piece).
• 💸 Spare thermal pads for chipset and RAM.

⚠️ Attention: If you are not confident in your skills, it is better to send laptops with soldered radiators to a service center. Incorrect heating will lead to detachment of the chip from the board (the so-called “chip-off”), which will cost 50–70% of the cost of the device.

Alternative solutions: when thermal paste does not help

If temperatures remain high after replacing the thermal paste, the problem may not lie in the thermal interface. Let's consider alternative cooling methods:

• 💨 Cleaning the Cooling System

  Dust in the radiator reduces cooling efficiency by 40–60%. Use compressed air (a can) or a vacuum cleaner with reverse draft. Do not blow the fan at maximum speed - this may damage the bearing!

• ⚙️ Undervolting

  Using utilities ThrottleStop (for Intel) or Ryzen Controller (for AMD) you can reduce the voltage on the cores, reducing heat dissipation by 10–15°C without losing performance. For example, for Intel i7-10750H optimal undervolt - -100 mV.

• 🖥️ Replacing thermal pads

  In laptops, thermal pads become dull over time and stop transferring heat from VRM modules and the chipset. Replace them with Fujipoly or Arctic Thermal Pad 1–1.5 mm thick.

• 🧊 Using a Cooling Pad

  Fan stands (eg Cooler Master NotePal X3) reduce the temperature by 5–8°C. However, they are useless if the problem is thermal paste or a clogged heatsink.

• 🔧 Replacing thermal paste with liquid metal

  Liquid metal pastes (for example, Thermal Grizzly Conductonaut) give an increase of 10–15°C, but require perfectly smooth surfaces and accuracy. Not suitable for aluminum radiators!

If none of the methods helped, the reason may be:

• 🔋 Battery degradation — a swollen battery puts pressure on the motherboard, disrupting the contact of the heatsink with the processor.
• 🖥️ Chipset faults - overheating Intel PCH or AMD FCH leads to throttling of the entire system.
• 💻 Problems with BIOS - some firmware (for example, in Lenovo Legion 5) artificially lower frequencies due to bugs.

FAQ: answers to frequently asked questions

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

Yes, but with reservations. Pastes for desktops (for example, Arctic MX-4) are also suitable for laptops, however:

• In laptops less radiator pressure, so the paste should be more viscous (for example, Noctua NT-H2