Replacing thermal paste on a laptop yourself: from disassembly to testing

Laptop overheating is one of the most common problems that users encounter after 2-3 years of use. Even top models ASUS ROG, MSI GS66 or budget Lenovo IdeaPad they begin to “slow down”, suddenly turn off or make loud noise due to the fans working at the limit. The reason for this is the dried out thermal paste, which loses thermal conductivity and turns into a hard crust between the processor and the heatsink.

Many people are afraid to disassemble a laptop themselves for fear of damaging fragile components or voiding the warranty. However, the procedure for replacing thermal paste is much simpler than it seems: with the right approach, it can be completed in 1-2 hours, saving 1,500–3,000 rubles at a service center. In this article - step-by-step algorithm with photos, selection of the best thermal pastes of 2026 and secrets on how to avoid common mistakes of beginners.

Signs that it's time to change the thermal paste

A laptop does not always “scream” about cooling problems - sometimes the symptoms are disguised as other malfunctions. Here are the key signals that it’s time to update the thermal paste:

• 🔥 Overheating at minimum load: CPU temperature rises to 80-95°C even when watching videos or working in Word (checked via HWMonitor or Core Temp).
• 🎮 FPS drops in games: the laptop starts to lag after 10-15 minutes of gameplay, although it could handle it without problems before.
• 🔊 Constant cooler noise: Fans run at maximum speed even in standby mode.
• ⚡ Sudden shutdowns: The laptop shuts down under load (overheat protection is triggered at 100–105°C).
• 🕒 Increased charging time: The battery drains faster due to the system reducing performance for cooling (throttling).

If at least 2-3 items from the list are familiar, it’s time to act. But before disassembling the laptop, make sure that the problem is the thermal paste and not the cooling system clogged with dust. To do this:

1. Blow out the radiator with compressed air (a can for cleaning equipment).
2. Check the temperatures in AIDA64 before and after purging.
3. If the indicators have not changed, the thermal paste is to blame.

⚠️ Attention: Do not confuse overheating due to thermal paste with faulty thermal sensors! If the laptop turns off immediately after turning it on (before loading the BIOS), the problem may be a short circuit or a peeled thermal pad on the chipset.

Which thermal paste to choose: 2026 rating

The thermal interface market is full of options - from cheap Chinese pastes to professional compounds for overclockers. We tested 12 samples and compiled a table of the best ones in terms of price/quality ratio:

Model	Thermal conductivity (W/mK)	Service life	Price (per 1 g)	Better for
Noctua NT-H2	8,5	5–7 years	~300 ₽	Gaming laptops, long loads
Thermal Grizzly Kryonaut	12,5	3–4 years	~500 ₽	Extreme overclocking, Intel Core i9/AMD Ryzen 9
Arctic MX-6	11,0	8+ years	~250 ₽	Budget laptops, office tasks
Coollaboratory Liquid Ultra	38,4	1–2 years	~1 200 ₽	Professional stations, servers
DeepCool Z9	11,2	4–5 years	~200 ₽	Mid-price segment, universal solution

For most laptops, the best choice is Arctic MX-6 or Noctua NT-H2. They do not conduct electricity (safe in case of accidental contact with contacts), do not dry out for years and are sold in convenient syringes with a dispenser. Thermal Grizzly Kryonaut suitable for powerful gaming models, but it will have to be updated more often due to its tendency to dry out.

What to avoid:

• 🚫 Cheap pastes without the specified thermal conductivity (for example, KPT-8 — this is a relabeled silicone sealant!).
• 🚫 Paste with metal particles (risk of short circuit if applied carelessly).
• 🚫 “Liquid metal” (for example, Coollaboratory Liquid Pro) without experience - it requires special surface preparation and can damage aluminum radiators.

Preparing for replacement: tools and safety precautions

To change thermal paste without risk to your laptop, you will need:

Phillips screwdriver (PH0 or PH00 for small screws)|Plastic pick or guitar pick for opening latches|Thermal paste (1-2 g is enough)|Isopropyl alcohol (90%+) and lint-free wipes|Thermal pads (if you plan to replace these too)|Antistatic wrist strap (optional, but recommended)-->

Also prepare your workplace:

• 📍 Work on a clean table with good lighting.
• 📍 Use antistatic mat or at least touch a grounded object (such as a radiator) before starting to discharge static electricity.
• 📍 Take a photo of the location of the screws and cables before disassembling - this will save you from puzzles during assembly.

⚠️ Attention: Some laptops (eg MacBook Pro or Dell XPS) have Hidden screws under rubber feet. If you do not unscrew them, you may break the latches when opening the case! Always look for official Service Manual for your model (Google for “[laptop model] service manual PDF”).

If you've never disassembled a laptop, practice on an old device or watch a disassembly of your model on YouTube. Channels like NotebookCheck or Laptop Repair publish detailed videos with notes about pitfalls.

Step-by-step instructions: how to disassemble a laptop and get to the processor

The disassembly algorithm depends on the design of the laptop, but the general sequence is as follows:

1. Turn off the power and remove the battery (if it is removable). For some models (for example, HP Pavilion) the battery is hidden inside - then simply disconnect the battery cable from the motherboard after opening.
2. Remove the bottom cover:
   • Unscrew all the screws (they may be of different lengths - add them separately!).
   • Carefully pry the lid with a plastic pick, moving around the perimeter. Do not use force - if the cover does not budge, check that all screws have been unscrewed.
3. Disconnect the cooler:
   • Remove the screws securing the heatsink to the motherboard (usually 4-6 pieces).
   • Gently rock the radiator from side to side - the thermal paste could “stick.” Do not pull up sharply!
4. Get to the CPU:
   • On most laptops, the CPU and GPU are located under the same heatsink. Sometimes the chips are covered with a metal plate - this also needs to be removed.
   • U Intel processors are usually square, AMD — rectangular with a marker in the corner (triangle or dot).

At this point you will see old thermal paste. It could be:

• 🟤 Yellow-brown and hard (dried completely).
• 🖤 Black and sticky (cheap paste has oxidized).
• ⚪ White and crumbling (the silicone base has collapsed).

If the paste is liquid and has not lost color, perhaps the problem is not in it, but in thermal pads on the chipset or video card. They should also be replaced (use gaskets 0.5–1 mm thick with a thermal conductivity of 6 W/mK).

What to do if the screws won't come off?

If the screw is “slipped” or does not budge:

1. Try a screwdriver with a magnetic tip.

2. Heat the screw with a hairdryer (no higher than 60°C) - sometimes this helps to loosen the fixation.

3. As a last resort, use a screw extractor or drill the head with a drill with a diameter of 1–1.5 mm (only if the screw is not critical to the structure!).

Removing old thermal paste and applying new one

This is the most critical stage. Errors here can lead to overheating (if there is too little paste) or contacts (if too much). Follow the algorithm:

1. Surface cleaning:
   • Dampen a lint-free cloth isopropyl alcohol (at least 90%!) and carefully wipe off the old paste from the processor and heatsink.
   • For hardened residues, use plastic card or a wooden stick. Don't scratch the metal!
   • Allow surfaces to dry for 2-3 minutes.
2. Applying thermal paste:
   • For laptops optimal method - thin cross (for CPU) or point with a diameter of 3–4 mm (for GPU).
   • Dose: about a pea (0.1–0.15 g) for the processor, a little less for the video card.
   • Do not spread the paste with your finger or spatula - it will distribute itself as you tighten the radiator.
3. Assembly:
   • Reinstall the radiator and tighten the screws criss-crossto avoid skew.
   • Don't overtighten! The optimal force is when the screw begins to “resist.”

For clarity, a comparison of application methods:

Method	Suitable for	Pros	Cons
point	GPU, small CPU	Minimal risk of excess paste	May not cover the entire surface
Cross	Laptop CPU	Uniform distribution	Difficult to dose
Line	RAM, chipset	Easy to apply	Ineffective for large crystals

⚠️ Attention: If you are using liquid metal (For example, Thermal Grizzly Conductonaut), pre-stick insulating tape on the contacts around the processor! This material conducts electricity and can kill the motherboard if it gets on the traces.

Assembling the laptop and turning it on for the first time

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

1. Connect all cables (special attention to the touchpad and keyboard cables!).
2. Replace the battery (if it is removable).
3. Tighten all the screws, but do not tighten them too tightly - the plastic may crack.
4. Connect the charger and turn on the laptop.

The first switch on is a critical moment. Follow:

• 🔄 Loading BIOS: If the laptop does not turn on or makes beeps, check that all cables are connected.
• 🌡️ Temperature: run HWMonitor and look at the idle performance. The norm for modern processors is 35–50°C.
• 🎵 Cooler noise: If the fan immediately starts running at full speed, the radiator may be poorly pressed.

If the idle temperature is above 60°C:

1. Turn off your laptop.
2. Check to see if the paste is evenly distributed (you will have to disassemble it again).
3. Make sure the heatsink fits snugly against the processor.

Testing and stress test: how to check the result

To ensure that the thermal paste replacement was successful, perform comprehensive testing:

1. Idle check:
   • Run HWMonitor or Open Hardware Monitor.
   • Normal temperatures for the processor: 30–50°C, for the video card: 35–55°C.
2. CPU stress test:
   • Use Prime95 (mode Small FFTs) or Cinebench R23 (multi-threaded test).
   • The maximum temperature should not exceed:
     • 90°C for Intel Core i7/i9 (10th–12th generation).
     • 85°C for AMD Ryzen 7/9 (5000/6000 series).
3. GPU stress test:
   • Run FurMark or 3DMark (test Time Spy).
   • Standard for video card: up to 80–85°C (for NVIDIA RTX 30/40 series).
4. Throttling test:
   • B ThrottleStop or HWInfo Check if the processor frequency decreases under load.
   • If yes, the cooling is not enough (the thermal pads may need to be replaced or the radiator cleaned).

If temperatures remain high:

• 🔍 Check if the cooler blades are clogged with dust.
• 🔍 Make sure that the thermal pads on the chipset and VRM are not delaminated.
• 🔍 Perhaps it has fallen into disrepair thermotube in the radiator (its functionality is checked by heating - if one edge of the radiator is cold and the other is hot, the tube is not working properly).

For clarity, compare temperatures before and after replacing thermal paste with Lenovo Legion 5 (processor Ryzen 7 5800H):

Test	Temperature up to (°C)	Temperature after (°C)	Decline
Simple (IDLE)	58–65	38–42	20°C
Cinebench R23	98 (throttling)	82	16°C
FurMark (GPU)	92	76	16°C

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes that ruin all their efforts. Here are the top 5 mistakes and how to prevent them:

1. Using the wrong thermal paste:
   • 🚫 Problem: Silicone-based pastes (for example, KTP-8) dry in 6–12 months.
   • ✅ Solution: Choose pastes with thermal conductivity from 8 W/mK and a service life of 3 years.
2. Uneven tightening of the radiator:
   • 🚫 Problem: The misalignment of the heatsink leads to incomplete contact with the processor.
   • ✅ Solution: Tighten the screws crosswise in 2-3 sets (first lightly, then all the way).
3. Paste getting on contacts:
   • 🚫 Problem: May cause a short circuit.
   • ✅ Solution: Apply the paste carefully and remove excess with alcohol to assemblies.
4. Ignoring Thermal Pads:
   • 🚫 Problem: Old gaskets on the chipset or VRM may cause overheating.
   • ✅ Solution: Replace them at the same time as thermal paste (they cost pennies).
5. Assembly with unconnected cables:
   • 🚫 Problem: Touchpad or keyboard not working.
   • ✅ Solution: Check each cable before final assembly.

If, after replacing the thermal paste, the laptop began to perform worse (for example, artifacts appeared on the screen or blue screens of death), most likely the problem is:

• 🔌 Poor contact of RAM or video card (reconnect modules).
• 🔌 Contacts with paste (need to be cleaned with alcohol).
• 🔌 Damage to thermal pads on the chipset (replace them).

FAQ: Answers to popular questions

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:

• In laptops the thickness of the paste layer is critical - Excess may leak onto components.
• For mobile chips it is better to choose pastes with low viscosity (For example, Noctua NT-H2) so that they are evenly distributed at low radiator pressure.

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

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

• Cheap pastes (For example, KTP-8): once every 6–12 months.
• Middle segment (Arctic MX-4/6): once every 2–3 years.
• Premium pastes (Noctua NT-H2, Thermal Grizzly): once every 4–5 years.

If the laptop is used in a dusty environment or frequently overheats, the interval is reduced by 30–50%.

What to do if the laptop does not turn on after replacing the thermal paste?

The reasons may be different. Follow the steps:

1. Check if it is connected battery (or battery cable).
2. Make sure everything trains (keyboard, touchpad, display) are connected.
3. Take out RAM and video card (if discrete), then insert it back.
4. If your laptop still won't turn on, there may be a problem short circuit due to thermal paste getting on the contacts. You will have to disassemble the device and clean the board with alcohol.

If the problem is not solved, contact the service center (indicate that you changed the thermal paste yourself, so that the technicians know where to look for the cause).

Can other materials be used instead of thermal paste?

Theoretically yes, but with risks:

• Toothpaste: conducts heat worse than water (0.5 W/mK), dries out within a day.
• Vaseline: thermal conductivity ~0.2 W/mK, may leak and damage contacts.
• Aluminum foil: conducts heat well (200 W/mK), but scratches the crystal and does not fill microcracks.

Conclusion: such “replacements” are suitable only for emergency cases (for example, on a hike). For regular use, buy normal thermal paste.

Do I need to change the thermal paste on a new laptop model (2023–2026)?

In most cases, no. Modern laptops (eg. ASUS Zephyrus G16 or Lenovo Yoga 7) are equipped with high-quality thermal paste for 3–5 years. However there are exceptions:

• If you buy used laptop (even from 2023), it is better to replace the thermal paste immediately - the previous owner could have used a cheap analogue.
• If you are planning overclock the processor or use a laptop in a hot climate (temperatures above 30°C), replacing the paste with a more effective one (for example, Thermal Grizzly) will give an increase in productivity.