Where to apply thermal paste in a laptop: a complete guide with nuances for different models

Why proper application of thermal paste is critical for a laptop

Thermal paste is not just a “lubricant” between the processor and the heatsink, but a key element of the cooling system, on which the work stability, productivity and even service life your laptop. If applied incorrectly, the temperature CPU or GPU may jump to 95–105°C, which will lead to throttling (automatic reduction of frequencies), sudden shutdowns or gradual degradation of the chip. This is especially true for gaming laptops (MSI GT77, ASUS ROG Zephyrus) and ultrabooks with compact cooling systems.

Many users mistakenly think that thermal paste needs to be applied “more” or “thicker”. In fact, too much paste is just as harmful as too little: it creates air bubbles, impairs thermal conductivity, and can leak onto the motherboard contacts, causing a short circuit. For example, in laptops Dell XPS 15 or MacBook Pro with thin heat pipes, even a minimal excess of paste leads to overheating due to a violation of tight contact.

In this article we will look at exact places to apply thermal paste in laptops of different brands, we’ll tell you about the nuances for Intel And AMD processors, and we will also show how to avoid common mistakes that even experienced users make. If you've never disassembled a laptop, don't worry: we'll give you step-by-step instructions with visual cues.

Where exactly is thermal paste applied in a laptop: main areas

Unlike desktop PCs, where thermal paste is only applied to CPU, in laptops it is used for several components. Here key areas, requiring processing:

• 🖥️ Central Processing Unit (CPU) - the main consumer of thermal paste. In laptops Intel Core i7/i9 or AMD Ryzen 7/9 heat release can reach 45–65 W under load.
• 🎮 Graphics Processing Unit (GPU) - relevant for laptops with a discrete graphics card (NVIDIA RTX 3060/4070, AMD Radeon RX 6800M). For example, in Lenovo Legion or Acer Predator The video card heats up no less than the processor.
• 🔋 Chipset (PCH) - in some models (for example, HP Omen or Gigabyte Aorus) requires cooling, but thermal paste is applied here less often.
• 📱 VRM modules (batteries) - powerful laptops may have separate radiators with thermal paste (for example, in ASUS ROG Strix Scar).

Important: not all laptops require applying paste to all listed zones. For example, in budget models (Acer Aspire 5, Lenovo IdeaPad 3) often cooled only CPU, and GPU integrated into the processor. To determine exactly which components need paste, study design of your model on the manufacturer's website or in disassembly on YouTube.

What does proper application look like: types and amounts of paste

The thickness and shape of the thermal paste layer directly affects heat transfer. The optimal layer is thin uniform film, which fills micro-irregularities between the processor cover (IHS) and the base of the radiator. Here 3 proven application methodsthat are used by professionals:

1. Pea method (recommended for most laptops): a drop of paste the size of 4–5 mm in the center CPU/GPU. With radiator pressure it will be evenly distributed.
2. Line method (for narrow processors, for example, in MacBook Air M1/M2): a thin strip in the center of the chip.
3. Cross method (for large chips, e.g. AMD Ryzen 9 6900HX): two perpendicular lines intersecting in the center.

Critical mistake - applying paste thick layer or try to smudge it with your finger/card. This leads to:

• ❌ Air bubbles (impair thermal conductivity by 20–30%).
• ❌ Leakage beyond the edges of the chip (risk of short circuit).
• ❌ Uneven radiator pressure (can deform IHS).

Processor type	Recommended Method	Paste quantity (mm)	Examples of laptops
Intel Core i3/i5 (U-series)	Pea	3–4	Lenovo ThinkPad T14, HP EliteBook 840
Intel Core i7/i9 (H-series)	Cross	4–5	ASUS TUF Gaming A15, MSI Katana GF66
AMD Ryzen 5/7 (HS-series)	Line or cross	4	Lenovo Yoga Slim 7, Acer Swift 3
Apple M1/M2	Thin line	2–3	MacBook Pro 14", MacBook Air

Step-by-step instructions: how to apply thermal paste in a laptop

Before starting work necessarily Prepare your tools and work area. You will need:

• 🔧 Set of screwdrivers (phillips, hex - depends on the model).
• 🧴 Thermal paste (we recommend Thermal Grizzly Kryonaut, Arctic MX-6 or Noctua NT-H2).
• 🧻 Lint-free wipes and isopropyl alcohol (90%+) for cleaning.
• 📸 Smartphone for photographing the process (useful for reassembly).

Unplug the laptop and remove the battery (if removable)|

Remove the back cover (carefully not to damage the latches)|

Take pictures of screw and cable locations|

Clean old thermal paste from the processor and heatsink with alcohol|

Check the integrity of the thermal pads (replace if necessary) -->

Now let's move on to the process itself:

1. Removing the cooling system: Carefully unscrew the screws holding the radiator (usually they are marked with numbers - the order of tightening is important!). On some models (Dell XPS 13, HP Spectre) the radiator is glued - use a plastic spatula.
2. Surface cleaning: Remove old paste with a lint-free cloth soaked in isopropyl alcohol. Don't use paper towels - they leave lint!
3. Applying new paste: Select a method (see table above) and apply the paste. For CPU And GPU use individual servings.
4. Assembly: Reinstall the radiator by tightening the screws criss-cross (this will ensure even pressure). Do not overtighten - this may damage the board!

What to do if thermal paste gets on the motherboard?

If the paste gets on the contacts or components of the board:

1. Immediately unplug your laptop.

2. Gently remove the paste with a cotton swab dipped in alcohol.

3. Let the board dry for 10–15 minutes.

4. Check your laptop for functionality until complete assembly (only connect the power supply, no battery).

If the laptop does not turn on, contact a service center (there may be a short circuit).

Common mistakes and how to avoid them

Even experienced users sometimes make mistakes that ruin all efforts to replace thermal paste. Here TOP-5 misses and ways to prevent them:

1. Using expired or cheap toothpaste. Thermal paste has an expiration date (usually 2–3 years in closed packaging). Cheap analogues (for example, KPT-8) lose their properties after a few months. Conclusion: Buy toothpaste from trusted brands and check the production date.
2. Uneven tightening of radiator screws. If you tighten the screws in a chaotic manner, the heatsink will press unevenly on the chip, which will lead to skewed IHS (in extreme cases - to cracks). Solution: Tighten the screws in a criss-cross pattern in 2-3 sets.
3. Ignoring Thermal Pads. Thermal pads keep laptops cool VRM, chipset And OPU. If they are dry or damaged, the temperature of these components will rise. Advice: Replace the gaskets with new ones (e.g. Thermalright 12.8 W/mK).
4. Too much pasta. Excess paste flows over the edges of the chip and may end up on SMD components. How to avoid: apply the paste with a dispenser or syringe without smearing.
5. Forgetting to check the temperature sensors. After assembly, many do not check the temperature in HWMonitor or Core Temp. If the temperature CPU under load exceeds 90°C, it means something went wrong. Action: Disassemble the laptop and repeat the procedure.

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If the temperature increases after replacing the thermal paste, most likely the heatsink is not tightly adjacent to the processor. Re-disassemble the laptop and check for uniform pressure.

⚠️ Attention: In laptops Apple (For example, MacBook Pro 2018–2023) thermal paste is applied only on CPU/GPU, and not to the power controller. Applying paste to VRM may cause motherboard failure!

Features for different laptop brands

The design of cooling systems varies depending on the manufacturer. Let's consider key nuances for popular brands:

ASUS (series ROG, TUF, ZenBook)

• 🔹 In game models (ROG Strix/Zephyrus) is often used liquid metal thermal paste (Thermal Grizzly Conductonaut). It cannot be replaced with a regular one - this will lead to overheating!
• 🔹 In ultrabooks (ZenBook 14) the radiator is glued - you need to remove it hair dryer or plastic spatula.

Lenovo (Legion, ThinkPad, Yoga)

• 🔹B ThinkPad P-series Thermal paste is also applied to CPU, and on GPU (even if it's Intel Iris Xe).
• 🔹B Legion 7 are used two heat pipes — make sure that the paste is applied evenly to both contact areas.

HP (Omen, Pavilion, EliteBook)

• 🔹B Omen 16 Thermal pads are often glued to the radiator - they need to be carefully removed before cleaning.
• 🔹B EliteBook 800-series are used copper radiators — the paste here needs to be applied thinner than on aluminum ones.

Apple (MacBook Pro/Air)

• 🔹 In models with M1/M2 thermal paste is applied only for processor (no separate GPU).
• 🔹B MacBook Pro 16" (2019–2021) in use double layer cooling system — the paste must be applied to both layers.

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For laptops Apple with chips M1/M2 use thermal paste with low viscosity (for example, Arctic MX-6), since the gap between the chip and the heatsink is minimal.

How to check the result: temperature testing

After assembling the laptop necessarily Check the effectiveness of the new layer of thermal paste. To do this:

1. Install monitoring programs:
   • 📊 HWMonitor (for Windows).
   • 📊 Intel Power Gadget (for MacOS).
   • 📊 Core Temp or GPU-Z (for detailed information on kernels).
2. Run the stress test:
   • 🔥 Prime95 (for CPU).
   • 🔥 FurMark (for GPU).
   • 🔥 Cinebench R23 (complex load).

Compare temperatures with standards:

Component	Normal temperature (load)	Critical temperature
Intel Core i7/i9 (H-series)	75–85°C	95°C+ (throttling)
AMD Ryzen 7/9 (HS-series)	80–90°C	100°C+ (shutdown)
NVIDIA RTX 30/40-series	70–80°C	89°C+ (throttling)
Apple M1/M2	60–75°C	90°C+ (rarely)

If temperatures remain high (90°C+), possible reasons:

• ❌ The radiator does not fit tightly (check the screws).
• ❌ Air bubbles in thermal paste (redo application).
• ❌ Dried thermal pads (replace them).
• ❌ Dusty fans (clean coolers).

⚠️ Attention: In laptops with vapor chamber (steam chamber, for example, Razer Blade 15 or ASUS ROG Zephyrus G14) thermal paste must be applied thinner than usual — excess paste will block the microchannels in the chamber, impairing heat dissipation.

FAQ: Frequently asked questions about thermal paste in laptops

❓ Do I need to apply thermal paste to the chipset or VRM?

Most laptops have a chipset and VRM cooled through thermal pads, not paste. The exception is game models (MSI GT76, Alienware m17), where on VRM there may be a separate radiator with paste. Check the design of your model before applying!

❓ Is it possible to use liquid metal instead of thermal paste?

Liquid metal (Thermal Grizzly Conductonaut) gives better heat dissipation, but not recommended for beginners, because:

• Conducts electricity (risk of short circuit if contacted with the board).
• Requires a perfectly flat surface (otherwise efficiency decreases).
• Difficult to remove when replacing again.

Only use it if you are confident in your skills and in laptops with copper heatsinks (e.g. ASUS ROG Strix).

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

The service life of thermal paste depends on its type and operating conditions:

• Regular pasta (Arctic MX-4, Noctua NT-H1): once every 1.5–2 years.
• High quality (Thermal Grizzly Kryonaut): once every 3–4 years.
• Liquid metal: once every 5+ years (if there were no leaks).

Signs that it's time to change toothpaste:

• The laptop has become overheat more often under the same loads.
• Fans work at maximum even in simple tasks.
• The idle temperature increased by 10–15°C compared to the "new" state.

❓ What to do if after replacing the thermal paste the laptop began to heat up more?

Probable reasons:

1. Radiator does not fit tightly to the processor (check the screws).
2. Thermal paste applied to a dirty surface (remains of old paste or fat impair thermal conductivity).
3. you used too much pasta, and it flowed over the edges of the chip.
4. Thermal pads not replaced or installed crookedly.

Solution: Disassemble the laptop, clean all surfaces with alcohol and repeat the procedure.

❓ Is it possible to apply thermal paste to a laptop with a guarantee?

Replacing thermal paste yourself voids the warranty from most manufacturers (ASUS, Lenovo, HP). Exceptions:

• Laptops with removable back cover and officially authorized user replacement of components (for example, Framework Laptop).
• Devices purchased on AliExpress or from unofficial sellers (often no guarantee).

If the laptop is under warranty, but is heating up, contact the service center with a request free replacement of thermal paste (this is stated in the warranty statements of many brands).