Overheating of the processor is one of the most common reasons for slow performance and sudden shutdowns of laptops. Even in modern models ASUS ROG, MSI GS66 or budget Acer Aspire Factory thermal paste loses its properties after 2-3 years, turning into a dry crust. Proper application of a new layer can reduce the temperature by 10-20°C, extend the life of the chip and avoid costly repairs.

However, the process requires care: errors in choosing a material, cleaning the surface or dosing the paste can aggravate the problem. In this article - step-by-step instructions with photo examples, comparison of popular thermal interfaces (Arctic MX-6, Noctua NT-H2, Thermal Grizzly Kryonaut) and answers to frequently asked questions. If you have never disassembled a laptop, start with the “Preparation” section, which describes critical nuances of dismantling the cooling system of ultrabooks with soldered RAM.

Why thermal paste loses effectiveness and when to change it

The thermal interface between the processor and the heatsink degrades due to:

  • 🔥 Drying out — the silicone or metal-containing base evaporates over time, leaving microvoids that impair thermal conductivity.
  • 🌀 Bundles — with frequent heating/cooling, the paste can “drip” to the edges of the crystal, exposing the center (especially important for Intel Core i9-13900H with high TDP).
  • 🧲 Pollution — dust and microparticles from the fan are mixed with the paste, forming an abrasive mass.

Signs that it’s time to update the thermal paste:

  • 🌡️ Idle temperature exceeds 50-60°C (check in HWMonitor or Core Temp).
  • 🎮 The laptop “throttles” (resets frequencies) during games or rendering, although it could handle it before.
  • 🔊 The cooler operates at maximum speed even at low load.
  • 🔋 The battery discharges faster due to constant overheating.
📊 How often do you check your CPU temperature?
  • Once a month
  • Only when the laptop slows down
  • Never checked
  • After each cleaning

The service life of thermal paste depends on its type:

Paste typeService lifeExamples of brands
Silicone1.5–2 yearsArctic MX-4, Cooler Master MasterGel
Metal-containing (with silver/aluminum particles)3–5 yearsThermal Grizzly Kryonaut, Noctua NT-H1
Liquid metal5–7 yearsThermal Grizzly Conductonaut, Coollaboratory Liquid Ultra
Ceramic2–3 yearsArctic Ceramique, DeepCool Z5
⚠️ Attention: Liquid metal pastes (Conductonaut) conduct electricity! They cannot be used on processors with exposed pins (e.g. AMD Ryzen 7 6800H in Lenovo Legion). When they come into contact with board elements, they cause a short circuit.

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

Key parameters when choosing:

  • 📊 Thermal conductivity (measured in W/mK) - the higher the better. Optimal: 8–12 W/mK for most laptops.
  • 🕒 Drying time - cheap pastes (KPT-8) lose their properties in 6–12 months.
  • 🔧 Consistency - thick paste (Noctua NT-H2) is easier to apply to mobile processors than liquid (Arctic MX-6).
  • 💰 Price - overpay for Thermal Grizzly Kryonaut (~1500₽) for office Intel Core i3 irrational.

Rating of thermal pastes for laptops (price/quality ratio):

  1. 1st place: Arctic MX-6 (11.6 W/mK, ~800₽) is the best choice for most users. Does not conduct current, does not require “grinding in”.
  2. 2nd place: Noctua NT-H2 (8.5 W/mK, ~1000₽) - ideal for thin laptops due to its thick texture.
  3. 3rd place: Thermal Grizzly Kryonaut (12.5 W/mK, ~1500₽) - for extreme cooling (RTX 4090 in ASUS Zephyrus), but requires replacement every 2 years.
  4. Budget option: DeepCool Z9 (5.6 W/mK, ~300₽) - suitable for old laptops (Intel Core 2 Duo).
Why is cheap thermal paste dangerous?

Pastes like "KPT-8" or unnamed Chinese analogues often contain abrasive particles that scratch the processor cover. This leads to microcracks that impair heat dissipation to 15–30% even after replacing the paste. In addition, cheap compounds can “spread” when heated above 90°C, flowing under the chip and causing corrosion of the contacts.

For laptops with two-chamber cooling system (For example, MSI Titan GT77 with separate heatsinks for CPU and GPU) recommended:

  • 🖥️ On processor — Noctua NT-H2 (thick, does not spread when the laptop is held vertically).
  • 🎮 On video card — Arctic MX-6 (better fills micro-irregularities in the chip NVIDIA RTX 40xx).

Preparing the laptop: disassembling and cleaning

Before applying thermal paste, you must completely dismantle the cooling system. The process differs depending on the model:

  • 🔧 Service laptops (Dell Latitude, HP EliteBook) — the cooling cover is secured with 4–6 screws, access to the processor is easy.
  • 🔨 Gaming/ultrabooks (Razer Blade, MacBook Pro) - complete disassembly is required (disconnecting the battery, removing the keyboard).
  • ⚠️ Laptops with soldered RAM (Apple M1/M2, Framework Laptop) - risk of damage if the radiator is removed carelessly.

Disconnect the laptop from the network and remove the battery (if removable)

Take photos of the location of screws and cables

Prepare an antistatic mat or gloves

Heat the laptop for 10–15 minutes (the thermal paste will become softer)

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Step by step cleaning:

  1. Removing old paste: Use isopropyl alcohol (90%+) And lint-free cloth. Cotton pads leave fibers! Suitable for dried pasta Arctic ArctiClean.
  2. Radiator cleaning: Remove dust from the fins with a brush or compressed air. Wipe copper surfaces with alcohol.
  3. Checking thermal pads: If they crumble or lose elasticity (for example, on VRM chips), replace them with new ones (Thermalright 12.8 W/mK).
⚠️ Attention: In laptops Apple MacBook (2018–2023) The processor and heatsink are often glued together with thermal paste Apple TIM, which hardens like cement. To remove the radiator you will need heating with a hairdryer to 60–80°C and a plastic pick. Do not use metal tools - they will scratch the chip cover!

Check status heat pipes:

  • ✅ A working tube heats up evenly along its entire length 10 seconds after switching on.
  • ❌ Faulty - remains cold or heats up only at the base. Needs replacement.

How to apply thermal paste: step-by-step instructions

The volume of paste is critical: excess is as harmful as deficiency. Optimal layer - 0.1–0.3 mm after installing the radiator. For most mobile processors (Intel Core i7-12700H, AMD Ryzen 9 7940HS) enough peas with a diameter of 4–5 mm.

Application methods:

MethodFor which processorsProsCons
DotMobile CPUs (up to 45W TDP)Simplicity, minimal risk of overflowMay not cover the edges of large chips
LineProcessors with an elongated shape (AMD Ryzen 9 6900HX)Uniform distribution under pressureDifficult to dose
CrossLarge chips (Intel Core i9-13980HX)Good corner coverageRisk of bubbles in the center
SmudgingFor advanced users onlyMaximum contactMay get on SMD elements

Instructions for the “Point” method (recommended for 90% of laptops):

  1. Apply a drop of paste to CPU center. For Intel — closer to the IHS cover, for AMD (where the crystal is displaced) - closer to the top edge.
  2. Install the radiator no shifts — the paste will distribute itself under the pressure of the fasteners.
  3. Screw the screws crosswise into 3–4 approachesto avoid skew. Tightening torque: 0.5–0.8 Nm (use a torque screwdriver for accuracy).
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To check even application, use transparent film (for example, from packaging). After removing the heatsink, press it against the processor - the fingerprint will show which areas are not covered with paste.

Features for different brands:

  • 🍎 MacBook (M1/M2): The paste is applied only on the GPU part of the chip (left side Apple Silicon). The CPU cores are located under the substrate and do not require additional cooling.
  • 🎮 ASUS ROG/MSI: To the video card (RTX 4070) the paste is applied cross, since the chip is square and large.
  • 💼 Dell XPS/HP Spectre: Due to the thin body, use paste with low viscosity (Arctic MX-6) to avoid being squeezed out of the edges.

Assembling the laptop and checking the result

After applying thermal paste:

  1. Make sure all cables are connected (especially display and touchpad cables).
  2. Check fan operation - they should start when turned on (in BIOS or through fan test in HWiNFO).
  3. Assemble the body without tightening the screws all the way - this may deform the board.

Testing:

  • 🌡️ Idle temperature: There must be 35–50°C (depending on the model). If higher 60°C — the radiator may be skewed.
  • 🎮 Load (Cinebench R23, FurMark): Maximum for Intel i7-13700H — 90–95°C, for AMD Ryzen 9 7940HS — 85–90°C.
  • 🔊 Cooler noise: If the fan is constantly running 100%, check heatsink contact with processor (perhaps the paste was squeezed out).
⚠️ Attention: In the first 2-3 heating/cooling cycles, the temperature may be higher than normal - this is normal, as the paste is “grinding in”. If the results have not improved after a day, disassemble the laptop and check the uniformity of the layer.

If the temperature remains high:

  • 🔍 Check it out radiator tightness — there should be no gap between it and the processor.
  • 🧴Perhaps pasta dried out during storage (check the production date on the tube).
  • 🌀 Make sure ventilation holes not clogged with dust (even after cleaning, residues can block airflow).
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The ideal result is a decrease in temperature by 10–15°C under load and no throttling. If the difference is less 5°CMost likely, the problem is not in the thermal paste, but in the cooling system (worn out heat pipes, weak cooler).

Common mistakes and how to avoid them

Even experienced users make mistakes that negate the effect of replacing the paste:

  • 💧 Too much paste: The excess is squeezed out over the edges and ends up on SMD resistors and may cause a short circuit. Especially dangerous for laptops with inverter power supply circuit (For example, Lenovo Yoga).
  • 🧴 Using expired toothpaste: The shelf life of most thermal interfaces is 2–3 years in a closed tube. After opening - 6–12 months.
  • 🔧 Uneven tightening of the radiator: Leads to skewed and incomplete contact. The screws must be tightened in 3 stages according to the “criss-cross” pattern.
  • 🧼 Cleaning with acetone: It dissolves plastic elements (for example, connectors on MacBook). Use only isopropyl alcohol.

How to fix errors:

ProblemReasonSolution
Temperature increased after replacementPaste with air (bubbles)Disassemble, apply a new layer using the “smearing” method
Laptop won't turn onThe paste got on the RAM/chipset contactsClean with alcohol, dry for 24 hours
Cooler works at maximumFan connector not connectedCheck the cooler cable in BIOS
Artifacts on the screenGPU overheating due to incorrect applicationRemake a layer on the video card

If you are using liquid metal paste:

  • 🛡️ Apply only on the processor cover, avoiding edges.
  • 🧤 Work in nitrile gloves — the paste is aggressive for the skin.
  • 🔌 Do not turn on the laptop 24 hours After application, let the paste polymerize.

FAQ: Answers to popular questions

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

Yes, but keep in mind viscosity. Pastes for desktops (Cooler Master MasterGel) are often more liquid and can spread into a thin laptop case. For mobile devices, it is better to choose thick formulations (Noctua NT-H2).

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

Depends on operating conditions:

  • 🏠 Office use: Once every 2–3 years.
  • 🎮 Games/Rendering: Once every 1–1.5 years.
  • 🌡️ Extreme conditions: (dust, high humidity) - once every 6–12 months.
What to do if thermal paste gets on the motherboard?

Urgent:

  1. Unplug the laptop and remove the battery.
  2. Wipe the stain cotton swab with isopropyl alcohol (no less 90%).
  3. Dry the board 24 hours in a warm, dry place (do not use a hair dryer!).
  4. Use a multimeter to check for short circuits power contacts.

If Conductonaut paste or similar - don't turn on the laptopuntil you are sure it is completely clean!

Do I need to change thermal pads when replacing paste?

Yes, if they:

  • Lost elasticity (fall apart when bent).
  • Have cracks or signs of extrusion.
  • Used over 3 years.

Gaskets are suitable for replacement Thermalright 12.8 W/mK (thickness 1–2 mm).

Can thermal paste be applied to a MacBook with an M1/M2 chip?

Yes, but only on the GPU part of the chip (left side). CPU cores in Apple Silicon located under the substrate and do not require additional cooling. Use thin layer (0.1 mm) pastes Arctic MX-6 or Noctua NT-H2.

⚠️ In models MacBook Pro 14"/16" (2021–2023) The heatsink is glued to the chip with thermal paste Apple TIM. To remove it you will need heating up to 80°C and plastic spatulas.