How to apply thermal paste to a laptop: detailed instructions for beginners

Laptop overheating is one of the most common problems that users encounter after 2-3 years of active use. The main reason? Dried out or poorly applied thermal paste, which ceases to effectively remove heat from the processor and graphics chip. But don’t rush to take the device to a service center: you can replace the thermal paste yourself, saving up to 3,000–5,000 rubles.

In this article we will analyze the entire process from A to Z: from choosing the right thermal paste to testing the result. You will learn what mistakes beginners most often make (for example, applying too thick a layer of paste can reduce heat transfer by 15–20%), how to avoid damaging components and what tools are really needed. And if you have never disassembled a laptop, don’t worry: we will give step-by-step recommendations, taking into account typical designs Lenovo, ASUS, HP and other brands.

Why is it important to change the thermal paste in your laptop on time?

Thermal paste (or thermal interface) is a special compound that fills microscopic irregularities between the processor cover and the heatsink. Without it, heat transfer deteriorates significantly, which leads to:

• 🔥 Throttling - automatic reduction in performance due to overheating (for example, Intel Core i7 may lose up to 40% power).
• 💻 Spontaneous shutdowns under load (games, rendering, code compilation).
• 🔋 Accelerated battery wear — when overheated, the battery degrades 2–3 times faster.
• 🛠️ Component failure — prolonged overheating shortens the life of the motherboard and chips.

The service life of thermal paste depends on its composition:

• Silicone (For example, KPX, AlSil-3) - 2–3 years.
• Metal-containing (For example, Arctic MX-6, Thermal Grizzly Kryonaut) - 4–5 years.
• Liquid metal (For example, Thermal Grizzly Conductonaut) - up to 8 years, but require careful application.

⚠️ Attention: If your laptop Dell XPS or MacBook Pro on chips Apple M1/M2, use only dielectric pastes (for example, Noctua NT-H2). Liquid metal can cause a short circuit if it comes into contact with the contacts!

How do you know when it's time to change the thermal paste? Please note:

• 🌡️CPU temperature is higher under load 90–95°C (check in HWMonitor or Core Temp).
• 🎮 Slowdown in games or when editing videos, despite high performance.
• 🔊 Constant operation of the cooler at maximum speed.

Which thermal paste to choose for a laptop: 2026 rating

The market for thermal interfaces is huge, but not all options are suitable for laptops. Main selection criteria:

• Thermal conductivity (measured in W/mK) - the higher the better. Optimal: 8–12 W/mK.
• Viscosity — the paste should not spread when heated.
• Dielectric properties — for beginners it is better to take non-conducting compositions.
• Service life — metal-containing pastes last longer than silicone ones.

Thermal paste model	Thermal conductivity (W/mK)	Type	Pros	Cons	Price (per 1 g)
Thermal Grizzly Kryonaut	12.5	Metal-containing	High efficiency, long service life	Requires break-in (200 hours), not dielectric	~500 rub.
Arctic MX-6	11.0	Ceramic	Dielectric, easy to apply, service life 8 years	More expensive than analogues	~350 rub.
Noctua NT-H2	8.5	Hybrid	Dielectric, does not dry out, spatula included	Lower thermal conductivity than competitors	~300 rub.
DeepCool Z9	11.2	Metal-containing	Good price/quality ratio	Can dry out in 2–3 years	~250 rub.
KPX (KPT-8)	0.9	Silicone	Cheap, sold everywhere	Low efficiency, dries within a year	~50 rub.

For most laptops (ASUS ROG, MSI, Acer Predator) optimal choice - Arctic MX-6 or Noctua NT-H2. They are safe for beginners and provide stable cooling. If you are willing to take risks and want maximum performance (for example, for RTX 4090 in Lenovo Legion), take Thermal Grizzly Kryonaut, but be prepared to apply it carefully.

⚠️ Attention: Don't use thermal paste KPX or AlSil-3 for modern processors (Intel 12th–14th generation, AMD Ryzen 7/9). Their thermal conductivity is insufficient for high loads, and temperatures can exceed 100°C after just 10–15 minutes of play.

Preparing to replace thermal paste: tools and disassembling the laptop

Before you begin, make sure you have everything you need. Minimum set of tools:

• ✅ Phillips screwdriver PH00 or PH0 (for most laptops).
• ✅ Plastic card or pick for carefully prying off the lid.
• ✅ Thermal paste (selected from the table above).
• ✅ Lint-free wipes and isopropyl alcohol (90%+ for cleaning).
• ✅ Thermal pads (if you plan to replace them too).
• ✅ Antistatic bracelet (optional, but recommended for safety).

Also prepare your workplace:

• 📍 Work on a table with good lighting.
• 📸 Take pictures of the location of screws and components before disassembling.
• ⚡ Disconnect the laptop from the network and remove the battery (if it is removable).
• 🧲 Keep a magnetic cup handy for screws - they get lost easily!

Now let's move on to disassembly. The algorithm of actions depends on the laptop model, but the general scheme is as follows:

1. Turn the laptop over and remove all the screws on the bottom cover. Please note: Some screws may be hidden under feet or stickers.
2. Carefully pry the lid open with a plastic card, starting from the corner. Be careful - the latches may break!
3. Disconnect the cables (if they interfere with access to the cooling system). To do this, gently pull the black tab of the connector.
4. Unscrew the screws securing the radiator and remove it. On some models (HP Omen, Dell G-series) it may be necessary to remove the entire cooling system.

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

If the screw is stuck or has a non-standard head (for example, Torx T5), use a rubber band for better grip or a specialized screwdriver with a magnetic tip. Do not use excessive force - a stripped screw head may block disassembly!

After removing the heatsink you will see the old thermal paste on the processor (CPU) and graphics chip (GPU). It may be dry, leaky, or even missing in places. This is what tired pasta looks like:

• 🟤 Yellow-brown color (oxidation).
• 🧊 Solid consistency (does not smear when touched).
• 🕳️ Voids between the chip and the radiator.

Make sure the laptop is unplugged|Remove the battery (if possible)|Take a photo of the location of the screws|Get wipes and alcohol ready|Wear an antistatic wrist strap (optional)-->

How to properly clean old thermal paste from a processor and heatsink

Cleaning is one of the most critical stages. If you leave the remnants of the old paste, the new one will lie unevenly and heat transfer will worsen. Use only isopropyl alcohol (not vodka or cologne!) and lint-free wipes (glasses wipes or microfiber will do).

Step by step instructions:

1. Moisten a cloth with alcohol and gently wipe the surface of the processor and graphics chip. Do not press too hard - the crystals are fragile!
2. For dried residues, use plastic spatula (not metal!). As a last resort, use a wooden toothpick.
3. Wipe the radiator on both sides. Pay attention to the microchannels - dust often accumulates there.
4. Allow all surfaces to dry completely (5-10 minutes). Check to make sure there are no lint or debris left behind.

What to do it's impossible:

• ❌ Use acetone or solvents - they can damage plastic parts.
• ❌ Rub the surface of the chip with metal objects (knife, screwdriver).
• ❌ Blow on the processor to dry - saliva contains fats that remain on the surface.

If there are traces of thermal pads (gray or black stripes) left on the radiator, they also need to be removed. To do this:

1. Warm up the gasket with a hairdryer (temperature 50–60°C) - it will become softer.
2. Carefully pry it with a plastic card.
3. Clean the residue with alcohol.

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

Now let's move on to the most important thing - applying new thermal paste. It is critical here to observe layer thickness And uniformity. Too little paste - there will be air gaps, too much - excess will come out over the edges and can short-circuit the contacts.

There are several application methods:

• 🟢 point - suitable for small chips (for example, Intel Core i3/i5).
• 🟣 Line - optimal for long processors (AMD Ryzen 9, Intel Core i9).
• ⚪ Cross - a universal method for most laptops.
• 🔴 Smudging — used for liquid metal pastes (requires experience).

For 90% of laptops we recommend the method "cross". Here's how to do it:

1. Place thermal paste on the tip of a plastic spatula (or use the syringe included).
2. Apply a small drop (3–5 mm in diameter) to the center of the processor.
3. Draw two perpendicular lines with a spatula, forming a cross. The layer thickness should be 0.2–0.5 mm.
4. For the graphics chip, repeat the process (if it is separate).
5. Reinstall the radiator and secure with screws. Tighten them up criss-crossso that the pressure is distributed evenly.

Visually, the correct layer of thermal paste should look like this:

• 👍 The paste protrudes slightly along the edges when tightening the radiator (but does not flow beyond the chip).
• 👍 No bubbles or tears.
• 👍 The color is uniform (without streaks of old paste).

⚠️ Attention: If you are using liquid metal paste (Thermal Grizzly Conductonaut), apply it only for chip, and not on the radiator! When tightening the screws, the metal may spread and short out the contacts on the motherboard. Also be sure to insulate surrounding components Kapton tape.

Assembling the laptop and checking the result

After applying thermal paste, all that remains is to assemble the laptop and test its operation. Follow these steps:

1. Make sure all thermal pads are in place (if removed).
2. Reconnect the cables (pay attention to the correct orientation of the connectors!).
3. Install the radiator and tighten the screws diagonallyto avoid skew.
4. Close the bottom cover and tighten all screws.
5. Connect the battery (if removed) and power supply.

Now turn on the laptop and check the temperatures:

• 🌡️ In idle time (Google Chrome, Word) — 35–50°C.
• 🎮 Under load (Cinebench R23, FurMark) — 70–85°C (maximum 90°C).

If the temperature is higher, it means:

• ❌ Too little or too much pasta.
• ❌ The radiator is not pressed well (check the screws).
• ❌ Air layers due to uneven application.

For an accurate test use:

• 📊 HWMonitor — shows the temperatures of all cores.
• 📈 ThrottleStop — checks throttling (make sure the value PL1/PL2 does not fall under load).
• 🎮 MSI Afterburner — for monitoring GPU.

If the temperatures are normal, but the cooler is still noisy, try:

• 🧹 Clean the radiator from dust (you can blow it with compressed air).
• 🔧 Replace thermal pads (they also wear out).
• 🔄 Update BIOS - sometimes the firmware optimizes fan control.

💡

Ideal CPU temperature under load: 70–80°C. If after replacing the paste it decreased by 15–20°C, you did everything right!

Common mistakes when replacing thermal paste and how to avoid them

Even experienced users sometimes make mistakes that ruin all their efforts. Here are the most common:

Error	Consequences	How to avoid
Too thick layer of paste	Deterioration of heat transfer, risk of contact with contacts	Apply a layer 0.2–0.5 mm, use the "cross" method
Using expired toothpaste	The paste loses its properties and dries quickly	Check the expiration date (usually 2-3 years)
Uneven tightening of radiator screws	Misalignment, incomplete fit, high temperatures	Tighten the screws in a crisscross pattern in 2-3 increments.
Cleaning with acetone or gasoline	Damage to plastic parts, grease residues	Use only isopropyl alcohol 90%+
Forgot to remove the protective film from the new paste	There is practically no heat exchange	Check the packaging before applying

A few more nuances that are often forgotten:

• 🔌 Do not turn on the laptop with the cover removed - this disrupts cooling and can lead to overheating.
• 🧲 Do not use magnetic screwdrivers near the hard drive (HDD) - this may corrupt the data.
• 🕳️ Do not leave screws “hanging” - they can fall on the motherboard and short-circuit the contacts.

If after replacing the paste the temperatures have not changed or even increased, check:

• 🔍 Correct assembly (are all cables connected, is the radiator not skewed).
• 🧪 Quality of paste (possibly fake - buy from official dealers).
• 💨 Cooler operation (may require lubrication or replacement).

What should I do if the laptop does not turn on after assembly?

1. Check the connections of the battery and power supply.

2. Make sure that all cables (especially power and power buttons) are connected correctly.

3. Inspect the motherboard for foreign objects (screws, pieces of plastic).

4. If the laptop turns on, but there is no image, check the connection of the matrix cable.

FAQ: answers to frequently asked questions about replacing thermal paste

🔹 Is it possible to use thermal paste from a computer for a laptop?

Yes, but keep in mind that laptops have limited space, so the paste should not spread. It is optimal to choose compounds with high viscosity (for example, Arctic MX-6 or Noctua NT-H2). Pastes for PC like Coollaboratory Liquid Ultra (liquid metal) require experience and component isolation.

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

Depends on the paste and operating conditions:

• Silicone (KPX) - once every 1–2 years.
• Metal containing (Thermal Grizzly Kryonaut) - once every 3–4 years.
• Liquid metal - once every 5-8 years (but require care).

If the laptop is used for gaming or rendering, check the paste annually.

🔹 Is it possible to apply thermal paste to an integrated video card?

Yes, but only if it has a separate radiator. Most laptops have integrated graphics (Intel UHD, AMD Radeon Vega) is cooled through the same heatsink as the processor. In this case, apply the paste only to central processing unit, and for the graphics core use thermal pads.

🔹 What to do if thermal paste gets on the motherboard?

Urgently disconnect the laptop from the power supply and carefully remove the paste:

1. Soak a cotton swab in isopropyl alcohol.
2. Wipe the dirty area without rubbing the paste further.
3. Let the board dry for 10-15 minutes.

If the paste is conductive (e.g. liquid metal), don't turn on the laptopuntil you make sure the contacts are clean! In difficult cases, contact service.

🔹 Do I need to change thermal pads when replacing thermal paste?

Preferably. Thermal pads shrink over time and lose elasticity, which impairs heat transfer from memory chips and VRMs. If the gaskets look flattened or frayed, replace them with new ones (eg Thermalright Extreme Odyssey thick 1–1.5 mm).