The Best Thermal Paste 2024: Explaining The Right Amount and Application

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Choosing the best thermal paste to use for only one time, which is too rare, may look like a hectic and lengthy task, but believe us, when the time comes to use it, you will need the best thermal paste for the CPU. A magnanimous number of thermal pastes are available in the online and retail markets. We understand that a person can get confused when he decides to purchase and type “thermal paste for CPU” or “CPU thermal paste” and bang, so many names appear on the screen.

We have made this effort to get our readers out of this dilemma of selecting the right thermal paste from the best thermal paste. Not only will we help you get out of this rut, but we will also guide you in the right direction. There cannot be a single best choice among every thermal paste available. There are different types and manufacturers, and although they serve the same purpose of transferring heat from CPU chips to coolers, they do it in their own unique way. This guide will help you identify the subtle price differences among other technicalities. These technicalities include questions like how to apply thermal paste, how much thermal paste is on the CPU, how to remove thermal paste, how to check the CPU temperature, and more.

What Is Thermal Paste?

Not only in computers, but in every machine be it electrical or mechanical, heat is the enemy. In computers, the CPU or GPU are the two power-hungry components, and when they work hard they generate significant heat. If these components become overheated due to excessive heat it can lead to crashes. If the heat is still ignored, it can cause some severe and permanent damage. This is where thermal paste, also known as heat sink compound or thermal interface material (TIM), comes in.

Thermal Paste Is the Silent Savior of Heat Transfer

Thermal paste, also known as thermal grease, thermal interface material (TIM), or heat sink compound, is a viscous substance with high thermal conductivity. It works as a bridge between a heat source and a heat sink to transfer the heat and simultaneously works as a wall between the heat damage and the CPU. Here’s what thermal paste does:

• Fills the Gaps: Though they appear smooth, CPUs and heat sinks have microscopic imperfections. Thermal paste fills these gaps and eliminates air pockets that would otherwise act as insulators and trap the heat.
• Improves Heat Dissipation: Thermal paste lets the heat sink absorb and dissipate heat properly. It does so by air gap elimination and proper and effective heat conduction.
• Conducts the Heat: Thermal paste boasts a much higher thermal conductivity than air. This allows it to efficiently transfer heat generated by the CPU or GPU to the heat sink.

Science Behind Thermal Paste Conduction

The heat transfers from a hot to a cold surface, body, or medium. The thermal paste’s conductivity is so high that it traps the heat by attracting towards it. Otherwise, the heat will dissipate into other areas. Do not consider it a coolant, as it is not cold enough to convert the heat. As mentioned earlier, it works as a conducive bridge like a subway going through a tube. Rest is the function of a heat sink to manage the efficient dissipation of heat.

Heat Sink Compound: Another Name for the Same Game?

There’s no real difference between thermal paste and heat sink compound. They are simply different terms for the same material. Here’s why:

• Same Function: Both thermal paste and heat sink compound serve identical purposes. They enhance thermal conductivity between a heat source and a heat sink.
• Equivalent Composition: They typically share a similar composition, often consisting of a silicone base with metallic particles like silver or aluminum oxide for improved heat transfer.
• Interchangeable Use: Manufacturers and tech enthusiasts alike use these terms interchangeably. Thus, you’ll encounter both terms when browsing product descriptions or reading tech forums.

So, Is Thermal Paste Essential?

Absolutely! Without thermal paste, the heat generated by your CPU or GPU would not go straight to the heat sink and will deviate here and there. If it attacks where it is not supposed to go, it will lead to overheating and potential damage. Be sure to choose a high-quality paste whenever you are building a computer from the ground up or replacing the thermal paste. Remember, correct application is paramount for optimal CPU and GPU temperature, performance, and component longevity.

Choosing the Best Thermal Paste

While the core functionality remains the same, the best thermal paste does come in various grades with varying thermal conductivity ratings. When selecting thermal paste, consider:

• Your Needs: Opt for a standard thermal paste if you are a basic computer user. However, overclockers or gamers pushing their hardware to the limit might require a higher-performance paste.
• Ease of Application: Some pastes are thicker and require more finesse during application.
• Budget: Thermal paste prices vary depending on performance and brand.

Now, let’s traverse the jungle of the best thermal paste.

Picking the Best Thermal Paste

There are several options available in the market, but to segment the choices smartly, we have provided you with the 5 best thermal pastes in their respective categories.

1. The very best thermal paste in terms of performance and efficiency.
2. The second best thermal paste in terms of price but not conductivity.
3. The mid-range best thermal paste provides quality and value for money.
4. The budget-friendly thermal paste is applicable on both desktops and laptops.
5. The least expensive provides enough value to be ignored.

Premium Thermal Paste

Prolimatech PK-3 Nano Aluminum

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Characteristics:

• Thermal Conduction: 11.2 W/mk
• Electrical Conductivity: No
• Cleanup
  • lint-free absorbent paper towels
  • alcohol pads
  • cotton swabs with alcohol
• Cost per gram: $3.60
• Usability: 4.5 (1=complex, 5=easy)
• Performance: 4.0 (1=low, 5=high)

Our tests have shown that PromilaTech PK-3 Nano Aluminium paste has a moderate viscosity and is integrated with aluminum and zinc oxide. It tends to hang close to, but not overtake, liquid metal compounds. The paste offers excellent stability, making it a breeze to apply to any surface and effortless to clean up. This paste is highly reliable and suitable for a wide range of CPU applications.

The Second-Best Thermal Paste

Thermal Grizzly Kryonaut

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Characteristics:

• Thermal Conduction: 12.5 W/mk
• Electrical Conductivity: No
• Cleanup
  • lint-free absorbent paper towels
  • alcohol pads
  • cotton swabs with alcohol
• Cost per gram: $9.90
• Usability: 4.5 (1=complex, 5=easy)
• Performance: 4.0 (1=low, 5=high)

Thermal Grizzly Kryonaut is a thermal compound with moderate viscosity and excellent stability. It is easy to handle and does not drip or run. This paste is incredibly user-friendly and hassle-free, making it a top choice for system builders.

The Mid-Range Best Thermal Paste

Arctic MX-5

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Characteristics:

• Thermal Conduction: 6 W/mk
• Electrical Conductivity: No
• Cleanup
  • lint-free absorbent paper towels
  • alcohol pads
  • cotton swabs with alcohol
• Cost per gram: $2.7
• Usability: 4.5 (1=complex, 5=easy)
• Performance: 4.0 (1=low, 5=high)

The MX-5 is a fresh compound with a different formulation than the popular MX-4. It is designed specifically for enthusiasts and made with carbon micro-particles in a base believed to be silicon or silicone. The compound is smooth and dense, with a subtle blue tint. 

It has a somewhat more fluid viscosity, similar to thin toothpaste, which makes it easier to apply and clean up. It spreads quickly and smoothly under mild stress, but beware, as it can drip and run if put on vertical surfaces. This paste will only be available until stocks run out because Arctic is retiring it to make room for their new MX-6.

The Best All-Rounder Thermal Paste

Noctua NT-H1

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Characteristics:

• Thermal Conduction: Unspecified
• Electrical Conductivity: No
• Cleanup
  • lint-free absorbent paper towels
  • alcohol pads
  • cotton swabs with alcohol
• Cost per gram: $2.3
• Usability: 4.5 (1=complex, 5=easy)
• Performance: 4.0 (1=low, 5=high)

The NH-H1 compound from Noctua is known for its viscosity and stability, making it easy to apply and clean up. This syringe with a screw-on cap ensures that the compound stays fresh and doesn’t dry out. It is also affordable, making it an excellent option for those on a budget. This paste is incredibly versatile and will work well for most builds.

The Best All-Rounder Thermal Paste

SYY 157

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Characteristics:

• Thermal Conduction: 15.7 W/mk
• Electrical Conductivity: No
• Cleanup
  • lint-free absorbent paper towels
  • alcohol pads
  • cotton swabs with alcohol
• Cost per gram: $3
• UUsability 3 (1=complex, 5=easy)
• Performance: 3 (1=low, 5=high)

This paste is thick and has a unique texture that allows it to spread slowly. Therefore, paying extra attention during the heatsink installation is crucial to ensure that even tension is applied for proper spread. The compound’s composition includes carbon particles.

Best Way to Apply the Right Amount of Thermal Paste

As promised earlier, we are determined to empower you with all the necessary information from knowing, buying, and applying the best thermal paste correctly. The proper and correct application of the thermal paste is absolutely essential.

The thermal paste is applied at the top of the processor chip, where the manufacturer’s and model information is printed. The top of the processor chip is metallic and smooth, making it easy to apply and spread the paste. Beware and remember: You should not, under any circumstances, apply the paste at the bottom or inside the CPU socket. Also, the pins at the bottom of the CPU should be kept free of the paste.

The right amount to apply can vary because of the size of the chip, but the right option is to go for a pea-sized amount. For the correct application, place the paste precisely at the center of the chip. More paste is not necessary for efficient heat transfer; the efficient application makes it possible. Secondly, when you attach the cooler by pressing it, the paste spreads evenly due to the pressure. We advise you not to do it with your hand. Lastly, an excess paste can spill over the edges of the chip and go inside the socket, causing thermal problems and leading to serious damage.

Replacing the Existing Thermal Paste

We know many people have this question in mind: How do I remove thermal paste? Also, it is necessary to remove the old paste and apply new paste when utilizing a new cooler or when replacing an old CPU. To do this, you will have to clean the previous one and apply the new one. Isopropyl alcohol is the superior cleaning agent for that purpose. Furthermore, many CPU coolers come with thermal paste already installed. In this instance, you won’t need to apply the paste again. 

The Difference Between Laptop and Desktop Thermal Paste

Also, many people need clarification on the laptop thermal paste and computer thermal paste. Both are the same and have similar purposes. Moreover, the applicant can use them interchangeably. A slight difference between them can be:

• Viscosity: Laptop paste might be thinner for tighter spaces, but most work well on both laptops and desktops.
• Quantity: Less paste is typically expected with laptop thermal paste as they accommodate less space than desktop.

FAQs

How long does thermal paste last?

Thermal paste may last anywhere from 2 to 10 years. The age depends on quality, usage, and factors like temperature. A usual recommendation is to replace it every 3-5 years for optimal performance.

Do CPU coolers come with thermal paste?

It depends on the CPU cooler:

Stock Coolers: Most CPUs, bundled with a stock cooler, will have thermal paste pre-applied to the cooler’s base. This paste is usually decent for basic use but might not be the best for overclocking.

Aftermarket Coolers:  Aftermarket coolers, which are purchased separately from the CPU, can come in two ways:

• Pre-applied: Some higher-end aftermarket coolers might have thermal paste pre-applied for convenience.
• Included Tube/Packet: Most aftermarket coolers will include a separate tube or packet of thermal paste for you to apply yourself.

How to remove the CPU cooler?

Removing a CPU cooler requires care. Here’s the gist:

1. Power down, unplug, and prep your workspace.
2. Locate the mounting mechanism (screws or levers) and disconnect any fan cables.
3. Unscrew (diagonal pattern) or unlock the retention mechanism according to your motherboard/cooler manual.
4. Gently twist and lift the cooler straight up to break the thermal paste seal.
5. Clean CPU and cooler base (optional) with isopropyl alcohol for reapplication.

Proceed with caution and consult your motherboard manual or cooler instructions for specifics. Consider video tutorials for visual guidance if needed.

How often should you change your thermal paste?

You typically don’t need to change thermal paste unless your computer shows signs of overheating or you remove the CPU cooler. However, for optimal performance, consider replacing it every 3-5 years.

Where to buy thermal paste?

You can find thermal paste at various stores:

• Computer stores: Both online and physical stores specializing in computer parts often carry thermal paste.
• Electronics retailers: Major electronics retailers might sell thermal paste alongside other PC components.
• Online marketplaces: Look for reputable sellers on online marketplaces like eBay, Amazon, Direct Macro, or Newegg.

Final Words

We hope this guide was helpful enough to magnify the importance of the correct amount and application of the best thermal paste. Neglecting the signs of overheating can lead to serious damage, and the replacement of thermal paste is of paramount importance. Remember, less is always better because the consequences of spilling are far more dangerous. If you need more information on any other computer products and components, please visit Direct Macro.