Replacing thermal paste on a laptop processor: a detailed guide for beginners and experienced users

Overheating of the processor is one of the most common reasons for decreased laptop performance. Over time, the factory thermal paste dries out, loses its thermal conductivity properties, and even powerful cooling systems can no longer cope with heat removal. If your laptop starts to suddenly turn off, slow down in games, or heat up to 90°C in simple tasks, it's most likely time to update the thermal interface.

In this article we will look at the whole process of replacing thermal paste — from choosing the appropriate composition to testing the result. You'll learn what tools you'll need, how to safely disassemble your laptop (including models with soldered memory), and What mistakes do beginners most often make?. We will also reveal several professional secrets that will help extend the life of your device after the procedure.

Spoiler: if you have never held a screwdriver in your hands, this is not a reason to abandon the idea. With the right approach, replacing thermal paste is a task of average complexity that even a user without technical education can cope with. The main thing is to take your time and follow a clear algorithm.

When is it time to change thermal paste: 5 obvious signs

Thermal paste does not have a fixed service life - it all depends on the quality of the composition, the intensity of use of the laptop and operating conditions. However there are several clear signalsthat it's time to act:

• 🔥 CPU temperature under load exceeds 85–90°C (checked in HWMonitor, AIDA64 or Core Temp). For comparison: the norm for most Intel Core i5/i7 And AMD Ryzen 5/7 - up to 75–80°C when fully loaded.
• ⚡ Laptop turns off spontaneously while gaming, rendering or compiling code. This triggers overheating protection.
• 🐢 Throttling (frequency reset): The processor artificially reduces performance to avoid burning out. In benchmark tests, this can be seen as sharp drops in FPS or points.
• 💨 The cooler works on maximum speed even in idle mode (for example, when watching a video in the browser).
• 🕒 Laptop more than 3–4 years, and the thermal paste has never been updated. Even if there are no symptoms, preventative replacement will extend the life of the components.

Interesting fact: in some models ASUS ROG And MSI the manufacturer uses cheap thermal paste already at the assembly stage. Owners of such devices often experience overheating literally after a year of operation. If you have a gaming laptop, check temperatures regularly!

⚠️ Attention: Don't confuse CPU overheating with video card problems. If artifacts (stripes, flickering) appear only in games, and the CPU is cold, the GPU thermal interface is to blame, not the CPU.

Which thermal paste to choose: 2026 rating and myths about “miracle products”

The thermal interface market is overflowing with offers - from budget Chinese pastes to professional compounds for overclockers. We tested 12 popular options and compiled a table with real indicators of thermal conductivity and durability:

Model	Thermal conductivity (W/mK)	Service life (years)	Price (per 1 g)	Features
Noctua NT-H2	8.8	5–7	~500 ₽	Non-conductive, easy to apply, does not dry out
Thermal Grizzly Kryonaut	12.5	3–4	~800 ₽	Best choice for extreme cooling, but requires frequent replacement
Arctic MX-6	11.0	8+	~400 ₽	Optimal price/quality ratio, does not contain metals
Coollaboratory Liquid Ultra	38.4	1–2	~2500 ₽	Liquid metal - for experienced users, requires care
DeepCool Z9	11.2	4–5	~350 ₽	Good budget option for office laptops

Important nuance: thermal conductivity is not the only criterion. For example, Coollaboratory Liquid Ultra shows record numbers, but it cannot be used with aluminum radiators (it corrodes them!). A Noctua NT-H2 loses in benchmark tests, but lasts 2 times longer than competitors.

For most laptops we recommend:

• 💻 Office/school (Intel U-series, AMD Ryzen 3/5U): Arctic MX-6 or DeepCool Z9.
• 🎮 Gaming (Intel H-series, AMD Ryzen 7/9H): Thermal Grizzly Kryonaut or Noctua NT-H2.
• ⚡ Extreme overclocking: Coollaboratory Liquid Ultra (only with copper radiators!).

⚠️ Attention: Liquid metal pastes (Liquid Ultra, Thermal Grizzly Conductonaut) require mandatory isolation processor and radiator with Kapton tape. Even a microscopic drop getting on the motherboard = short circuit and repair for 10–20 thousand rubles.

Myths about thermal paste that people still believe in

1. “The more thermal paste, the better” → Excess creates a “cushion”, impairing heat transfer. The optimal layer is 0.1–0.3 mm.

2. “Chinese paste for 100 ₽ is no worse than a branded one” → Cheap compounds often contain abrasive particles that scratch the processor cover.

3. “Thermal paste needs to be spread” → Modern pastes will spread themselves under the pressure of the radiator. Smearing results in air bubbles.

4. “Liquid metal is eternal” → It oxidizes and requires replacement every 1–2 years, despite its record thermal conductivity.

Preparing for replacement: tools and safety precautions

Before you start disassembling, make sure you have everything you need. Here minimal set of tools:

• 🔧 Screwdriver set: cross (PH00, PH0), straight (1.5–2 mm), sometimes torx (T5) is needed. For MacBook will be required Pentalobe P5.
• 🧴 Thermal paste (selected from the table above) + alcohol solution (isopropyl alcohol 90%+ or Arctic Clean).
• 🧻 Lint-free wipes or coffee filters (plain paper leaves lint!).
• 📦 Plastic pick (for carefully prying up the latches) and suckers (for removing screens with adhesive fastening).
• 🔌 Antistatic wrist strap (or at least a grounded metal surface to work on).

Additionally useful:

• 📸 Smartphone — take photographs of each stage of disassembly, especially the location of the cables.
• 🧲 Magnetic mat or a box for screws (so as not to lose small parts).
• 🔍 Magnifier - will help you notice microcracks on the board or remnants of old paste.

Critical: Before disassembly completely discharge the battery (to 0%) and disconnect the charger. Some laptops (eg. Lenovo Legion) even when the power is turned off, voltage from the battery is supplied to the board!

Disconnected the laptop from the network and discharged the battery|Prepared the work area (clean, illuminated surface)|Checked the compatibility of the thermal paste with the radiator|Took a photo of the initial state of the board|Put on an antistatic wrist strap (or touched a grounded object)-->

Step-by-step disassembly of a laptop: how to get to the processor

The disassembly algorithm depends on the laptop model. We will consider universal scheme, but for specific devices (for example, Dell XPS or HP Omen) additional steps may be required. Always looking disassembly guide for your YouTube model or iFixit.

General procedure:

1. Removing the back cover:
   • Turn the laptop over and unscrew all screws (they can be hidden under the legs!). On some models (MacBook Air) the lid is glued - you will need a hair dryer to soften the glue.
   • Gently pry the lid open with a plastic pick, starting from the corner. If you hear a crunching sound, stop; most likely, there are screws left unscrewed.
2. Battery disconnection:
   • Locate the battery connector on the motherboard (usually a black or orange connector with 2-4 wires).
   • Carefully remove it by pulling for the plastic tongue, and not by the wires!
3. Removing the cooling system:
   • Unscrew the screws securing the radiator (usually 4-6 pieces). In some laptops (ASUS TUF) they have different lengths - remember which one was screwed in where!
   • Carefully remove the radiator. If it gets stuck, don’t pull it - warm it up with a hair dryer. 50–60°C 2–3 minutes.

This is what the processor looks like after removing the heatsink (for example: Intel Core i7-12700H):

⚠️ Attention: In laptops with soldered memory (For example, Apple M1/M2 or AMD Ryzen 6000) RAM chips can be located next to the processor. Do not confuse them - you only need to apply the paste to the CPU cover!

Removing old thermal paste and preparing surfaces

This is the most critical stage. Cleaning quality directly affects the effectiveness of the new paste. Here's how to do it right:

1. Removing paste residue:
   • Dampen a lint-free cloth isopropyl alcohol (90%+) and gently wipe the processor cover and heatsink base.
   • For dried residues, use plastic card (not metal!). Movements - from the center to the edges.
   • Repeat the procedure 2-3 times until the surface is perfectly clean. Check in the light - there should be no streaks!
2. Assessing the condition of thermal pads:
   • If the radiator has grey/black gaskets (thermal drop) for VRM or memory chips, check their integrity. Delaminated or hardened gaskets must be replaced.
   • Gaskets are suitable for replacement Arctic Thermal Pad thick 0.5–1 mm (measure the old ones with a caliper!).
3. Checking the radiator plane:
   • Attach the radiator to perfectly flat surface (for example glass). If there are gaps, the radiator is bent and requires straightening (you can do roller from paper and a hammer).

Important point: if there is a scratches or chips (often happens after careless cleaning), it will have to be polish. To do this use:

• 🧼 Toothpaste (no abrasive particles!) + soft cloth for easy polishing.
• 🔧 Sandpaper 2000–3000 grit (only for deep scratches, followed by polishing with paste GOI).

Applying new thermal paste: technique and common mistakes

This is where the fun begins. Application method depends on processor type And contact area. We will look at three main methods:

1. Pea method (recommended for most CPUs)

• 🟢 Apply a drop of paste the size of pea grain (diameter ~5 mm) to the center of the processor cover.
• 🔄 With radiator pressure, the paste will be evenly distributed. This method is suitable for Intel And AMD with square lid.

2. Line method (for narrow processors, for example, Apple M1)

• 🟡 Apply a thin strip of paste along the long side of the processor.
• 📏 The width of the strip is ~3 mm, the length is 1–2 mm less than the CPU cover.

3. “Cross” method (for large processors, for example, Intel i9-13900H)

• ❌ Draw two perpendicular lines forming a cross.
• ⚠️ Do not overdo it with the quantity - excess paste will come out around the edges and may end up on the board elements.

Common mistakes made by newbies:

• ❌ Too much pasta → a “cushion” is formed, which impairs heat transfer.
• ❌ Finger/card smudging → air bubbles appear.
• ❌ Using expired toothpaste → loses its properties 1–2 years after opening the tube.
• ❌ Application on a dirty surface → reduces efficiency by 30–40%.

After applying the paste:

1. Carefully reinstall the radiator, lining up the screw holes.
2. Tighten the screws criss-cross (like the wheels of a car!) to avoid distortion. Tighten in 2-3 sets with gradual intensification.
3. Connect the cooler to the motherboard (don't forget about the connector!).

How to check if the paste is applied correctly?

After assembly, start the laptop and let it run for 10-15 minutes under load (for example, in Cinebench). Then carefully remove the radiator and inspect the paste mark:

- Ideal option: A thin, even layer without gaps.

- Bad option: the paste has gathered around the edges or there are “bald spots” left in the center.

If the result is unsatisfactory, repeat the cleaning and application procedure.

Assembling a laptop and testing the result

Now all that remains is to put everything back together and check whether the overheating problem has been resolved. Follow these steps:

1. Reassembly:
   • Reinstall all cables and connectors (refer to the photographs taken before disassembly!).
   • Secure the back cover by screwing all screws (don’t leave any “extra” ones!).
   • Turn on the laptop without battery (only connect the charger) and check that it starts.
2. Stress test:
   • Install programs HWMonitor And Prime95 (or OCCT for GPU tests).
   • Run the test on 10–15 minutes and monitor temperatures. Optimal values:
     • Intel: to 75–80°C under load.
     • AMD Ryzen: to 80–85°C (they have higher heat dissipation).
   • If temperatures dropped by 10–20°C Compared to before the replacement - you did everything right!
3. Additional checks:
   • Listen to the laptop for extraneous noise (creaks, rattling). If the cooler becomes quieter, this is a good sign.
   • Run 3DMark or Unigine Heaven, if you have a discrete video card, check if it is overheating.

If after replacing the paste the temperature have not changed or even grown, possible reasons:

• ❌ Poor radiator contact (check if it is bent and all screws are tight).
• ❌ Dried thermal pads on VRM chips (they also needed to be replaced).
• ❌ Poor quality pasta (especially relevant for cheap Chinese compounds).
• ❌ Dust in the cooler (if the cooling system has not been cleaned).

💡

If after replacing the paste the laptop became switch off when under load, stop testing immediately! Most likely, the heatsink is installed crookedly and the processor overheats even more.

Frequently asked questions and problems after replacing thermal paste

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

Yes, but with reservations. Pastes for desktops (for example, Thermal Grizzly Kryonaut) are also suitable for laptops, however:

• Often used in laptops thinner layers thermal interface (due to the dense layout).
• Some pastes (eg. Coollaboratory Liquid Metal) may be incompatible with aluminum laptop radiators.
• For ultrabooks (MacBook Air, Dell XPS 13) it is better to choose pastes with low viscosity (Noctua NT-H2).

How much thermal paste does a laptop need?

Enough one drop the size of a pea (diameter ~5 mm). Tube volume Arctic MX-6 (4 g) enough for 8–10 substitutions. The main thing is not quantity, but quality of application.

Exception: if you are using liquid metal (Liquid Ultra), that's enough literally 0.1–0.2 g per processor.

What to do if after replacing the paste the laptop starts to heat up more?

Possible causes and solutions:

• The radiator is installed crookedly → Disassemble the laptop and check for even fit.
• Too much/too little paste → Redo the application (optimally using the “pea pea” method).
• Forgot to connect the cooler → Check if the fan spins when turned on.
• Thermal pads on VRM are dry → Replace them with new ones (Arctic Thermal Pad).
• Dust in the cooling system → Blow out the radiator with compressed air.

If the problem remains, it is possible The thermal paste itself has degraded (For example, Kryonaut loses its properties after 1–2 years). Try a different composition.

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

Yes, if:

• Video card (NVIDIA RTX or AMD Radeon) heats up higher 85°C under load.
• Appeared artifacts in games (strips, flickering, driver crashes).
• More for the laptop 3–4 years, and the paste has not been changed yet.

The process is similar, but there are nuances:

• Often used on GPU thermal pad instead of pasta (especially in NVIDIA Max-Q).
• Video card memory chips also need a thermal interface (use spacers 1–1.5 mm).

⚠️ Attention: In some laptops (MSI GE76, ASUS Zephyrus) the video card and processor are under one radiator. When disassembling, do not lose small springs and washers!

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

The service life depends on the composition and operating conditions:

Paste type	Service life	Recommendations
Silicone (Arctic MX-6)	4–6 years	Ideal for office laptops
Metal containing (Kryonaut)	2–3 years	Requires frequent replacement, but provides better cooling
Liquid metal (Liquid Ultra)	1–2 years	For advanced users only, isolation required
Ceramic (cheap pastes)	1–2 years	Dries quickly, not recommended

Additional factors that shorten the service life of the paste:

• 🔥 Constant operation of the laptop in high load mode (games, rendering).
• 🌡️ Operation in hot climates or near heat sources.
• 🚬 Dusty cooling system (dust acts as a heat insulator).