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9 Best Thermal Paste in 2021 Reviews & Buying Guide

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A thermal paste acts as a highly conductive medium between the hot surface of a CPU/GPU and the heat sink which is further connected with the fans to provide necessary cooling action. Thermal paste is crucial for the working of a computer, and you cannot use a computer for more than 5 minutes without thermal paste as the CPU will overheat and shut down the computer altogether. If you want to apply fresh thermal paste on your new system, or simply reapplying it on an older one, consider the following aspects before you buy one.

  • Thermal Conductivity: The thermal conductivity of a thermal paste represents its capability to transfer heat from one surface to another. The conductivity is available in the W/mK unit where higher is always better.
  • Included Quantity: The thermal paste is packed in a syringe before shipping and it is available in a certain quantity per syringe. Generally, you will get a few grams of thermal paste per syringe that you can apply to your CPU.
  • The density of The Paste: The thermal paste is in a semi solid state which makes it kind of difficult to apply. If the density of paste is too low, it can slip past the surface and enter the CPU socket and potentially damage the CPU socket permanently.

The thermal pastes that you are going to find on our list of the best thermal paste are carefully curated on the basis of above mentioned factors and a few more essential characteristics. If you want to know more about thermal pastes, make sure you take a look at our “Buying Guide” for the best thermal paste available later in the article. Also, check out each option carefully to find the best option in your budget.

9 Best Thermal Paste in 2021

Best Thermal Paste in 2021: Reviews

1. ARCTIC MX-4 Thermal Paste

Arctic Mx4 thermal pastw

Arctic is a well-known brand for many users as they offer a variety of thermal paste within different price ranges. Their MX series thermal paste is one of the most popular options as it is highly affordable.

We are placing one of the most affordable options from our picks of the best thermal paste on the top of our list as it has been a favored choice for many users in the past. Arctic MX uses its proven formula to make the MX-4 thermal paste to offer you a standard 8.9 W/mK thermal conductivity. It has excellent temperature reduction performance which makes it an ideal choice for CPU as well as GPU applications. The MX-4 compound is completely metal free and electrically non-conductive to save your parts from electrical damage.

Because the Arctic MX-4 does not contain any metal or Silicon proportion, it tends to last longer than those that do, giving this paste a possible lifespan of over 8 years after a single application. The MX-4 thermal paste is designed in such a way that it maintains ideal consistency and makes the application part much easier for first time users.

Best Features:

  • Budget friendly thermal paste
  • The available quantity is 4 grams
  • 5 W/mK thermal conductivity
  • Operating temperature is between -50°C to 110°C
  • 8 years approximate lifespan
  • metal and Silicone free compound

Pros:

  • Designed with known and trusted Arctic formula
  • Highly popular choice
  • The expected lifespan is high

Cons:

  • Applicator is not included

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2. Noctua NT-H1 Thermal Paste

Noctua NT-H1 Thermal Paste

Noctua is a premium brand that only deals with computer cooling peripherals such as cabinet fans, CPU coolers, and also thermal pastes. The following choice from Noctua is highly premium, yet very popular amongst users.

Our 2nd pick is also coming from a well-known brand in the industry called Noctua. The Noctua NT-H1 is probably the only choice available in the market right now that you can trust without thinking too much about its specifications. This is a premium grade thermal paste that is suitable for both CPU and GPU applications. Because of its high performance, the Noctua NT-H1 has over 150 awards under its belts with a lot more recommendations.

The Noctua NT-H1 comes in a 3.5 grams syringe which makes it easy to apply over any heat sink surface. Also, it is easy to clean off the surface if the application goes wrong or if you are removing previously applied thermal paste at the time of cleaning. It does not require any alcohol to clean and can be cleaned with dry paper towels due to its high density. The Noctua NT-H1 is completely electrical resistant and non-corrosive that increases its lifespan tenfolds. If there is some thermal paste left after application, you can store it for up to 3 years and use it again to deliver the same performance.

Best Features:

  • The available quantity is 3.5 grams
  • Over 150 awards and recommendations
  • Operating temperature is between -50°C to 110°C
  • Premium grade thermal paste
  • Safe from electrical and corrosion damage
  • Can be stored for up to 3 years

Pros:

  • The suitable life cycle is 5 years
  • Multiple applications are possible
  • Does not degrade after storing

Cons:

  • Thermal conductivity is not specified

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3. Arctic Silver 5 Thermal Paste

Arctic Silver 5 AS5-3.5G Thermal Paste

We are back with yet another feature from Arctic. As we mentioned, Arctic produces multiple options for different budgets and it’s silver thermal pastes are yet another affordable choice from its lineup.

Made with a 99.9% pure micronized silver composition, our 3rd pick for the best thermal paste brings a lot of performance and reliability to the table. The Arctic Silver 5 has a standard thermal conductivity of 8.5 W/mK available with 3.5 grams of paste present in every package. The paste is also completely electrically non-conductive, which is an important factor if you are going to apply the thermal paste on a computer. Also, the thermal paste has a thick composition and high density that avoid problems like bleeding and over deposition.

The string itself, that holds the thermal paste, is designed in such a way that you can apply the thermal paste from the syringe directly without needing an applicator. You can then store the excess thermal paste in the same syringe and store it until it’s required again. Arctic suggests -50°C to 130°C temperature range for Arctic Silver 5 thermal paste. Also, The Arctic Silver 5 does not contain any Silicon in the composition, which has many advantages.

Best Features:

  • One of the most affordable thermal pastes
  • The available quantity is 3.5 grams
  • 5 W/mK thermal conductivity
  • Operating temperature is between -50°C to 130°C
  • Completely electrically non-conductive
  • Completely Silicon free

Pros:

  • Easy to apply and store
  • Suitable temperature range is great
  • Standard thermal conductivity

Cons:

  • Quantity should have been more

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4. Nabob Deals Thermal Paste

Nabob Deals Thermal Paste

Nabob deals is rather a different type of brand compared to other options present on our list today as it manufactured many different types of products along with a thermal paste. But still, it has sold many products in the past with a highly positive response from its users.

The Arctic Silver 5 Thermal Cooling Compound offered by  Nabob Deals has nearly 88% thermally conductive filler present in its composition for every unit weight. Along with micronized silver, there are other compounds present such as zinc oxide, aluminum oxide, and boron nitride which extends its thermal conductivity further ahead. Nabob Deals also includes a dedicated thermal paste applicator with 3.5 grams syringe of this thermal paste so that this unique, high-density product can be applied easily over critical surfaces.

Once properly installed, the Nabob Deals Arctic Silver 5 offers a high level of performance thanks to its standard thermal conductivity level that brings the CPU temperature down and allows it to perform faster. And with the lowered temperature levels, the performance seems to stabilize completely. If you make the application layer up to 0.003 inches thick for every application, you can get a lot of installations done with the same syringe. After application, you will see an effective drop in the temperature of your CPU up to 3 to 12 degrees.

Best Features:

  • The available quantity is 3.5 grams
  • Performance is great
  • Comes with a dedicated applicator
  • 88% thermally conductive filler
  • Up to 3 to 12 degrees temperature drop for CPUs
  • ZInc oxide, aluminum oxide, and boron nitride present with silver

Pros:

  • Chemical composition is great
  • Suitable for a number of applications
  • Can be used with CPUs as well as GPUs

Cons:

  • Suitable temperature range is not mentioned

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5. Thermal Grizzly Thermal Paste

Thermal Grizzly Thermal Paste

Up next, we have the best thermal paste money can buy coming from a premium brand called Thermal Grizzly. This brand has a high reputation for providing great products such as the thermal paste mentioned here.

If your primary requirements are the sheer quantity of thermal paste as well as the thermal conductivity, then look no further. The Thermal Grizzly Kryonaut Thermal Paste is going to be the best option for you, considering it’s over the top 12.5 W/mK thermal conductivity paired with 5.55 grams quantity available on every syringe. Such high thermal conductivity offers a suitable temperature range of -250°C to 350°C which is perfectly suitable for all types of applications.

As the suitable temperature range is high, you should prefer this option if you have a high performance graphics card or CPU that you are going to overclock after your build is finished. The Thermal Grizzly Kryonaut Thermal Paste is specially designed to provide a stable performance after overclocking as it manages to keep the temperature levels in control even when the components are operating at a faster clock rate. The Thermal Grizzly Kryonaut Thermal Paste does not have any cure time and offers long term stability that allows users to store it for years before using it again.

Best Features:

  • Most premium thermal paste
  • Designed for overclocked systems
  • The available quantity is 5.55 grams
  • 5 W/mK thermal conductivity
  • Operating temperature is between -250°C to 350°C
  • Best choice for 24*7 running systems

Pros:

  • One of the best thermal conductivity available
  • Included quantity is highest in comparison
  • Suitable for long term applications

Cons:

  • Very expensive thermal paste

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6. Flux Thermal Paste

Flux Thermal Paste

For casual applications, you should not need to spend a lot of money on premium thermal paste. Instead, you can go with brands like FLUX for an affordable choice.

Now that you have looked at the most premium thermal paste let us introduce you to the most affordable thermal paste available on our picks. The FLUX Thermal Paste comes at a fraction of the price compared to the premium options available today. On top of that, FlUX has included 5 syringes in every package so that you can use them for up to 5 different applications without worrying about storage. The thermal conductivity for this thermal paste is around 3.2 W/mK, whereas each syringe consists of 1.5 grams of thermal paste.

The Flux Thermal Paste is very easy to use, considering all you have to do is open one of the syringes and apply the paste directly on the heatsink without any additional step. The paste is made up of polysynthetic grease for enhanced performance. It is a great choice for CPUs and GPUs, especially if you own multiple systems in your home or office.

Best Features:

  • Most affordable thermal paste
  • The available quantity is 1.5 grams per syringe
  • 2 W/mK thermal conductivity
  • 5 different syringes are included in every package
  • Silver poly synthetic grease paste
  • Easy to use for multiple applications

Pros:

  • Thermal paste is already separated for easy applications
  • Easy to store
  • Composition is good

Cons:

  • Thermal conductivity is very low

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7. GELID GC-Extreme Thermal Paste

GELID GC-Extreme Thermal Paste

Gelid is not as popular a brand as other choices mentioned on our picks today. But, it is a great brand for those who need a commercial level thermal paste under an affordable price tag.

The GELID GC-Extreme thermal paste is specially designed for extreme application where you would require higher thermal conductivity than standard thermal pastes. This paste will offer you a thermal conductivity of 8.5 W/mK over a total quantity of 3.5 grams available per package. With such high conductivity, GELID GC-Extreme promises the best performance in this budget range. It will also grant much needed stability to your CPU at the time of overclocking.

There is a dedicated GELID applicator present in the package that you can use to apply the thermal paste easily over any surface. Due to its high thermal conductivity, GELID GC-Extreme offers suitable temperature limits from -45°C to 180°C. Keep in mind that this thermal paste is offering the highest temperature range compared to any other option in the present market right now.

Best Features:

  • Extreme application thermal paste
  • Suitable for server computers and crypto mining rigs
  • The available quantity is 3.5 grams
  • 5 W/mK thermal conductivity
  • -45°C to 180°C suitable temperature range
  • Easier to apply with the applicator

Pros:

  • Suitable for special purpose systems
  • Suitable temperature range is best in this class
  • 73g/cm³ paste density for easier installation

Cons:

  • Quantity should have been more

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8. LANSH Arctic Silver Thermal Paste

LANSH Arctic Silver Thermal Paste

We have yet another thermal paste offered by Arctic present on our list. Here, we are including the most heavy duty thermal paste designed by Arctic for heavy applications.

The Arctic Silver thermal paste mentioned here is one of the best thermal paste you can find in the market in terms of thermal conductivity and ease of usage. The Arctic Silver thermal paste comes with high thermal conductivity of 9 W/mK that could easily be used for personal as well as commercial applications without any second thought. As for the temperature range, Arctic has specified the range from -50°C to 130°C  so it should not be a problem for most applications.

The Arctic Silver thermal paste is made up of high density micronized silver with conductive ceramic particles introduced in the paste to provide heightened thermal conductivity while avoiding electrical conductivity altogether. This paste has a managed triple phase viscosity which makes it much easier to install. Thus, giving your system perfect stability even when working under heavy load for a longer duration.

Best Features:

  • Most powerful thermal paste from Arctic
  • The available quantity is 3.5 grams
  • 9 W/mK thermal conductivity
  • Operating temperature is between -50°C to 130°C
  • Micronized silver paste with ceramic particles
  • Triple phase Viscosity

Pros:

  • System stability will be balanced
  • Completely electrically non-conductive
  • Thermal conductivity is high

Cons:

  • Very limited quantity is provided

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9. SYY Thermal Paste

SYY Thermal Paste

Not all thermal pastes are manufactured for gaming and working computers. There are a handful of brands like the SYY which specifically manufacturers heavy duty thermal pastes for special purpose systems that require extensive cooling performance.

In the end, we have reserved the best thermal paste from our list in terms of thermal conductivity. Coming from SYY, the SYY thermal paste offers a very high thermal conductivity of up 15.7 W/mK that introduces many more applications for this paste. For starters, it can be used with a high temperature range starting from -30°C all the way up to 280°C which is not possible with standard thermal pastes. On top of that, it is also a completely metal free and electrically non-conductive thermal paste which avoids short circuits and similar hazards.

With such high thermal conductivity, SYY thermal paste turns out to be a much better option even than liquid metal, which is considered perfect for heavy duty applications. Also, it is available at less than half the cost of a premium thermal paste which is a great advantage for its buyers. Along with the 2 gram syringe, you will find a dedicated paste applicator from SYY which makes the whole process faster and doable for freshers that are handling the thermal paste for the first time.

Best Features:

  • Special purpose thermal paste
  • Metal free and electrically non-conductive
  • Comes with a paste applicator
  • The available quantity is 2 grams
  • 7 W/mK thermal conductivity
  • Operating temperature is between -30°C to 280°C

Pros:

  • Highest thermal conductivity in comparison
  • Delivers high performance and stability
  • Suitable temperature range is great

Cons:

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Buying Guide For The Best Thermal Paste

Your computer consists of many electronic parts that are passing a significant amount of current through them while you are using the computer. Every electronic product that deals with flow electrical current also has to deal with rising temperature. The rise in temperature is quite high in parts like the CPU and GPU that have the highest load on your computer.

Hence, dedicated cooling systems are provided for these peripherals so that the temperature can be controlled. But for the efficient performance of the cooling system itself, you need a thermal conductivity catalyst called a thermal paste on the surface of the CPU/GPU chip. Here are some important specifications of a thermal paste that affects its performance and the overall thermal status of your computer.

Thermal Conductivity

As we are discussing the factors that affect the performance of a thermal paste, let’s talk about the most crucial factor first which is its thermal conductivity. The thermal conductivity of any fluid is basically its capacity to conduct the heat from one end to another. In the case of computers, the thermal paste is applied between the CPU and heatsink so that it can quickly absorb heat from the CPU and push it towards the heat sink for further heat dissipation.

The thermal conductivity of a thermal paste is represented in the W/mK unit where higher thermal conductivity rated options are generally better. But, you also need to consider your cooling system before you buy a heavy duty option. There is no point in getting a 15 W/mK thermal paste if you are applying it over a stock cooler that has very limited cooling performance.

Quantity of Thermal Paste

The quantity of thermal paste available in the package should only concern you if you are planning more than one application with the paste. In any thermal paste pack, you will be getting at least 2 grams of paste available in the syringe that can easily get multiple applications performed with ease.

Any less than that would be a problem as it won’t allow you to do overs if something goes wrong the first time. Also, you should be able to store the thermal paste securely if there is an ample quantity available in the package that you cannot use at once. The best way to store thermal paste is to keep it as it is in the syringe itself and keep the syringe locked in an airtight container. Having multiple syringes helps in such a case as you only need to open one at a time for an application.

Thermal Paste Compound

The chemical compound of a thermal plays an important role in its performance and stability. There are a lot of different chemicals used by different brands to make a thermal paste by which they manage to achieve a certain level of thermal conductivity and provide that at a certain budget. Generally, you should take a look at reviews of previous users if you want a quick idea about the stability and useability of the thermal paste.

You can also look into the compounds used in the making of the thermal paste to make sure that there are no harmful compounds used that can be hazardous for the system. The thermal paste compound needs to be thermally conductive and electrically non-conductive for best performance.

TDP of Your System

TDP stands for the thermal design power of a system. You will be more familiar with this term if you own a laptop instead of a desktop computer as TDP is used to determine the input requirement and power capacity of the laptop. While buying a thermal paste, you should consider examining your system and calculate the average TDP of your CPU or GPU and make sure your thermal paste can suffice its requirements. For higher TDP, you will be needing a high quality thermal paste whereas a standard option will be good enough for mid-range builds. The TDP rating of your system also helps you to determine the suitable temperature range that must be supported by your thermal paste.

Conclusion

Most people prefer high end thermal paste bought separately for the application. Also, you would need a thermal paste in case you are cleaning your computer and willing to reapply the paste to increase the temperature statistics of the CPU. In any case, you will find the best thermal paste on our list today. If you are not sure which option is right for you, look at some of the best options available below.

  • High thermal conductivity is crucial for heavy load applications. If you are using your computer for longer sessions, the SYY 2 CPU Paste Thermal Compound Paste is going to be perfect for your needs. While SYY only provides 2 grams of paste in every package, you will be getting a thermal conductivity of 15.7 W/mK, which is best in comparison.
  • Talking about the quantity of thermal paste, Thermal Grizzly beats all other choices by offering a large 5.55 grams syringe full of Thermal Grizzly Kryonaut Thermal Paste. It has a high thermal conductivity of 12.5 W/mK and is suitable for multiple applications for the same of different computers.
  • Lastly, we will recommend the Noctua NT-H1 Thermal Paste as the best value for money option from our list. Noctua is known for premium yet reliable and high performance products and the Noctua NT-H1 is no exception for that. You will be getting 3.5 grams of thermal paste with a suitable temperature range of -50°C to 110°C that covers standard as well as gaming computers.

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