Thermal paste in a laptop: where is it located, what does it look like and when to change it

Have you ever wondered why your laptop suddenly starts to heat up like an iron even though it was previously running quietly? Or why does the fan spin at maximum speed even during simple tasks? The reason often lies in a small but critical component - thermal paste. This gray or white compound, hidden under the heatsink, is responsible for dissipating heat from the processor and video card. Without it, the laptop will simply burn out from overheating.

Many users are not even aware of its existence until they encounter problems. Meanwhile, thermal paste is a “circulatory system” of cooling, which dries out over time, loses its properties and requires replacement. In this article we will figure out is there thermal paste in every laptop, where exactly is it located, how to check its condition and when is it time to run for a new one. Without unnecessary water - just facts, tips and step-by-step instructions.

Where is thermal paste located in a laptop and what does it look like?

Thermal paste is applied to processor chips (CPU) And graphics chip (GPU) — the “hottest” laptop components. It serves as a heat conductor between them and the metal radiator, which then dissipates the heat using a fan. Without paste, the air gap between the chip and the heatsink acts as a thermal insulator, and the temperature rises sharply.

What does she look like? This is a thick mass of gray, white or slightly yellowish color (depending on the composition). The new paste has a uniform consistency, similar to toothpaste, while the old one dries out, cracks, or turns into a hard crust. For example, in laptops ASUS ROG or MSI high-quality paste with silver particles is often used, and in budget models Acer or Lenovo IdeaPad - cheaper analogues.

• 🔍 Processor (CPU): Typically a square or rectangular chip under a large heatsink.
• 🎮 Video card (GPU): Can be a separate chip (in gaming laptops) or built into the processor.
• ⚡ Chipset or VRM modules: in some models the paste is applied to them (for example, in MacBook Pro or Dell XPS).

To see the thermal paste, you will have to disassemble the laptop and remove the cooling system. In most cases, it is hidden under a metal plate with heat pipes. In some ultrabooks (for example, Apple MacBook Air) access to it is extremely limited due to soldered components.

Signs that the thermal paste in your laptop has dried out

If your laptop begins to behave suspiciously, this may be a signal: it's time to check the thermal paste. Here are the key symptoms that should not be ignored:

• 🔥 Overheating: CPU temperature rises to 90–100°C even under light load (tested in HWMonitor or Core Temp).
• 💨 Constant fan operation: The cooler spins at maximum, even when the laptop is idle.
• ⚡ Throttling (frequency reset): The laptop suddenly slows down, although the CPU load is low (visible in Task Manager).
• 🔌 Spontaneous shutdowns: The device turns off when it gets hot (overheat protection).
• 🕳️ Hot case: The keyboard or bottom cover becomes hot (especially in the CPU area).

For example, in laptops HP Pavilion or Dell Inspiron When the paste dries, there is often a sharp drop in performance in games or when rendering videos. And in MacBook Pro (especially 2016–2019 models) this may lead to video card failure due to overheating of chips AMD Radeon - a known problem that Apple has even officially acknowledged.

⚠️ Attention: If the laptop turns off at temperatures above 105°C, this is a critical signal! Continued use without replacing the paste may result in irreversible damage to the processor.

Symptom	Probable Cause	Urgency of paste replacement
Temperature higher 90°C in idle time	The paste is completely dry	⭐⭐⭐⭐⭐ (critical)
The fan is noisy, but the temperature is normal	Dust in the radiator, the paste is still usable	⭐⭐ (you can wait)
Laptop slows down under load	Throttling due to poor heat dissipation	⭐⭐⭐⭐ (replacement recommended)
Hot spots on the body	Local chip overheating	⭐⭐⭐ (check the pasta)

How long does thermal paste last in a laptop and when to change it

The service life of thermal paste depends on its quality, operating conditions and laptop model. Here are the estimated dates:

• 💎 High quality paste (For example, Noctua NT-H2, Thermal Grizzly Kryonaut): 3–5 years.
• 🔄 Standard paste (used in most laptops from the factory): 2-3 years.
• ⚠️ Cheap pasta (in budget models): 1–2 years (may dry out earlier).

However, these terms are provisional. If you:

• Use the laptop for gaming or rendering (constant high load),
• You work in a dusty room (the radiator is clogged),
• Carry the device frequently (vibrations speed up drying),

then the paste should be checked once every 1–2 years, even if there are no symptoms of overheating.

In laptops Apple MacBook (especially with chips M1/M2) thermal paste lasts longer thanks to an optimized cooling system, but even there its condition should be monitored after 3–4 years of use. And in gaming laptops (ASUS TUF, Lenovo Legion) Due to high temperatures, replacement may be required within a year.

How to check the thermal paste in a laptop yourself

If you suspect that the paste has dried out, you can check it without completely disassembling it. Here are the step-by-step instructions:

1. Remove the back cover (in most laptops it is secured with Phillips screws). On some models (MacBook, Dell XPS) you will need a special screwdriver P5 or T5.
2. Find the cooling system — metal radiator with heat pipes and fan.
3. Carefully remove the radiator (after disconnecting the fan cable and unscrewing the screws). Be careful - there may be cables under the heatsink!
4. Inspect the paste on the processor and video card:
   • ✅ Normal: soft, evenly distributed mass.
   • ❌ Problem: dry spots, cracks, hard crust.

Here's what dried paste looks like using a processor as an example: Intel Core i7:

Photo of dried thermal paste (description)

There are gray spots with cracks on the chip; the paste is not sticky, but crumbles when touched. In some places the bare metal of the crystal is visible.

If the paste is fine, but the laptop is heating up, the problem may be:

• 🧹 Dust in the radiator (needs cleaning)
• 🔧 Poor radiator contact (screws are not tightened evenly),
• 🔋 Faulty fan (check the rotation of the blades).

⚠️ Attention: If, when removing the radiator, the paste trails behind it in “threads,” this is a sign that it is still liquid and does not require replacement. And if it remains on the chip as a hard layer, change it urgently!

Which thermal paste to choose for replacement?

Not all thermal pastes are created equal. For laptops, it is important to choose a composition with high thermal conductivity and a long service life. Here are the best options for 2026:

Model	Thermal conductivity (W/mK)	Pros	Cons	Price (per 1 g)
Thermal Grizzly Kryonaut	12.5	Better thermal conductivity, long service life	Darling, it needs breaking in	~500 rub.
Noctua NT-H2	8.9	Easy to apply, does not conduct electricity	Average thermal conductivity	~300 rub.
Arctic MX-6	11.0	Good price/quality balance, does not dry out	Thick, difficult to apply	~250 rub.
Coollaboratory Liquid Ultra	38.4	Record thermal conductivity (liquid metal)	Conducts electricity! Only for experienced	~1000 rub.

For most laptops, the best choice is Arctic MX-6 or Noctua NT-H2. They do not require running-in, do not conduct current and last 3–5 years. But Coollaboratory Liquid Ultra (liquid metal) is best not used by beginners - if applied carelessly, it can short-circuit the contacts on the motherboard.

In gaming laptops (MSI GE76, Alienware m15) two cooling systems are often installed - separately for the CPU and GPU. In this case, it is better to take two different pastes: a more viscous one (for example, Kryonaut) for the processor and less dense (for example, MX-6) for a video card.

Step-by-step instructions for replacing thermal paste

If you decide to replace the paste yourself, follow this algorithm. Important: work on a clean surface, free of lint and dust.

1. Turn off the laptop and disconnect the battery (if it is removable). In models with a non-removable battery (MacBook, Xiaomi Mi Notebook) just turn off the power and wait 10 minutes.
2. Remove the back cover and disconnect the fan cable. In some laptops (ASUS ZenBook) you may need to remove the keyboard.
3. Unscrew the radiator (screws are usually marked with numbers - tighten them in reverse order!). Be careful: there may be power cables under the heatsink.
4. Remove old paste lint-free cloth and alcohol (isopropyl, 90%+). Don't use cotton swabs - they leave lint!
5. Apply new paste:
   • For CPU: a pea-sized drop (≈5 mm) in the center of the chip.
   • For GPU: a thin strip along the entire length of the crystal.

There is no need to spread the paste - it will flatten evenly when tightening the radiator.

Reassemble the laptop in reverse order, making sure all cables are connected.

After assembly, turn on the laptop and check the temperatures in HWMonitor. If everything is done correctly, the idle temperature should be 40–50°C, and under load - no higher 80–85°C.

⚠️ Attention: If the temperature increases after replacing the paste, check:

• The tightness of the radiator (perhaps the screws are not tightened evenly),
• Quality of paste application (too much or too little),
• Fan connection (may not spin due to a disconnected cable).

Common mistakes when replacing thermal paste and how to avoid them

Even experienced users sometimes make mistakes that lead to even greater overheating. Here are the most common:

• 🔧 Too much pasta - excess can leak onto the motherboard and short-circuit the contacts. Optimal layer: 0.1–0.3 mm after tightening the radiator.
• 🧴 Uneven distribution — if you spread the paste only on part of the chip, the remaining zones will overheat.
• 🔩 Overtightened radiator screws - this can lead to chip deformation or cracks on the board. Tighten the screws crosswise, firmly 0.5–0.8 Nm (use a torque screwdriver if available).
• 🧼 Using unsuitable cleaning products - acetone or vodka leaves a film. Isopropyl alcohol only!
• ⚡ Forgot to disconnect the battery — even when the laptop is turned off, voltage remains on some components. Risk of short circuit!

In laptops with soldered memory (For example, MacBook Pro 2018+ or Dell XPS 15) errors when replacing paste can lead to chip failure VRAM. If you are not confident in your abilities, it is better to contact the service.

Another typical problem is Using expired thermal paste. Yes, it also has a shelf life! For example, Arctic MX-4 Once the tube is opened, it can be stored for no more than 2 years. Expired paste loses its properties and can worsen overheating.

1) Dust in the radiator (needs cleaning with compressed air),

2) The condition of the thermal pads (they also harden over time),

3) Fan operation (may be jammed or faulty).-->

FAQ: Frequently asked questions about thermal paste in a laptop

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

Yes, but with reservations. Paste for PCs and laptops differs in viscosity: in laptops it should be less fluid so as not to spread when moving the device. It is optimal to choose pastes marked "for laptops" or "low bleed" (for example, Noctua NT-H1).

What happens if you don't change the thermal paste at all?

Over time, the paste dries out and an air gap forms between the chip and the heatsink. This leads to:

• Constant throttling (resetting processor frequencies),
• Accelerated wear of the chip due to overheating,
• Possible video card failure (in gaming laptops),
• Reduced battery life (due to increased power consumption due to overheating).

In extreme cases, the laptop may fail beyond repair.

Is it possible to apply thermal paste to memory chips (RAM) in a laptop?

No, if we are talking about RAM strips. They do not need thermal paste as they do not heat up as much as CPU/GPU. However, in some laptops (for example, MSI GT76 with RTX 3080) chips VRAM (video memory) can overheat, and are used for thermal pads, not pasta.

How often should you change thermal paste on a MacBook?

B MacBook (especially with chips M1/M2) Thermal paste lasts longer due to optimized cooling. However:

• In models up to 2020 (from Intel) - once every 2–3 years,
• B MacBook Pro 16" (2019) s AMD Radeon — once every 1–2 years (due to problems with GPU overheating),
• B MacBook Air (without fan) - no replacement required, as passive cooling is used.

Apple uses proprietary paste, but it can be replaced with Thermal Grizzly Kryonaut for better results.

Can I use other materials (for example, toothpaste) instead of thermal paste?

Absolutely not! Toothpaste, glue, Vaseline or other “folk” remedies will not only not help, but will also worsen the situation:

• They do not conduct heat, but insulate it,
• May damage contacts on the motherboard,
• They dry out in a few days, leaving a sticky layer.

The only alternative is liquid metal (For example, Coollaboratory Liquid Ultra), but it requires experience in application.