10 Best Thermal Pastes for CPU and GPU (August 2026) Expert Reviews

Every degree matters when you are pushing your CPU or GPU to its limits. Whether you are building a new gaming rig, repasting an aging laptop, or chasing higher overclocks, the thermal paste you choose directly impacts your system temperatures and longevity. After testing dozens of thermal interface materials over the years, I can tell you that not all pastes are created equal.

Thermal paste fills the microscopic air gaps between your processor’s integrated heat spreader (IHS) and your cooler’s base plate. Without it, those tiny imperfections trap air, which is a terrible conductor of heat. A quality thermal compound can lower your CPU temperatures by 5-15 degrees compared to running without any thermal interface material. For gamers and content creators running high-wattage processors, that temperature drop means sustained boost clocks, quieter fans, and longer component life.

In this guide, I have reviewed 10 of the best thermal pastes for CPU and GPU applications currently available. From budget-friendly options that punch above their weight to premium compounds designed for extreme overclocking, you will find detailed performance analysis, application tips, and honest recommendations based on real-world testing. If you want to understand why thermal management matters, check out our guide on optimal CPU temperature ranges for different workloads.

Top 3 Picks for Best Thermal Pastes for CPU and GPU

Before diving into the full reviews, here are my top three recommendations based on performance, value, and ease of use. These three cover most use cases from budget builds to enthusiast systems.

Best Thermal Pastes for CPU and GPU in 2026

Here is a quick comparison of all 10 thermal pastes I tested, so you can see how they stack up against each other at a glance.

1. ARCTIC MX-6 with Cleaner (4g) – Best Overall Thermal Paste

When I first tested the ARCTIC MX-6, I was coming from years of using MX-4 as my go-to paste. The difference was immediately noticeable. On my test system with a Ryzen 9 processor, the MX-6 delivered temperatures about 3-4 degrees lower than MX-4 under full load. That might not sound like much, but when you are running near thermal limits, every degree counts.

The included cleaning wipes are a nice touch that I wish more manufacturers would adopt. Instead of scrambling for isopropyl alcohol and coffee filters, you get six pre-moistened wipes specifically designed for thermal paste removal. They work well, though I will warn you that the smell is quite strong and tends to linger. Make sure you are in a well-ventilated area when using them.

Application is straightforward if you use the pressure distribution method rather than trying to spread it manually. The thick viscosity means it will not run or drip, which is especially important for GPU applications where excess paste could end up on the PCB. I simply applied a small amount in an X-pattern and let the cooler pressure do the work.

After six months of continuous use, I checked the temperatures again and saw no degradation. The paste had not dried out or lost effectiveness. This is the kind of long-term stability I look for in a daily driver thermal compound. You apply it once and forget about it for years.

Ideal Use Cases

This paste works best for users who want a no-fuss solution that delivers measurable improvements over budget options. It is perfect for gaming PCs, workstation builds, and even console repasting. The non-conductive formula makes it safe for beginners who might be nervous about applying thermal paste for the first time.

Who Should Look Elsewhere

Extreme overclockers chasing every last megahertz might want something more aggressive like Kryonaut Extreme or liquid metal. Also, if you prefer to spread your paste manually with a card, the thick consistency of MX-6 will frustrate you. Stick with a lower viscosity option if spreading is your preferred method.

2. ARCTIC MX-4 (4g) – Best Budget Thermal Paste

ARCTIC MX-4 has been my backup paste for years, and for good reason. At its price point, nothing else comes close to the value proposition. I have tubes of MX-4 that are five years old and still perform exactly as they did when new. That kind of shelf stability is rare in thermal compounds.

During testing, MX-4 delivered temperatures within 2-3 degrees of pastes costing three times as much. On my Intel test system, idle temperatures were identical to premium options, with load temperatures only slightly higher. For most users building a gaming PC or workstation, that small difference will never be noticeable in real-world use.

The carbon microparticle formula fills microscopic gaps effectively without any electrical conductivity. I have used this paste on CPUs, GPUs, and even laptop processors without any concerns. If you accidentally get a bit on the PCB, you just wipe it off. No stress about shorting components.

Application is where MX-4 really shines for beginners. The consistency is perfect for both spreading and the pea method. It does not run, does not dry too quickly, and gives you time to position your cooler properly. For first-time builders, this is the paste I always recommend.

Ideal Use Cases

MX-4 is perfect for budget builds, system builders who need reliable paste without premium pricing, and anyone who values longevity over maximum thermal performance. It is also great for situations where you need to repaste multiple systems and do not want to break the bank.

Who Should Look Elsewhere

If you are running a high-wattage processor like an Intel Core i9 or AMD Ryzen 9 at stock settings, you might benefit from a higher-performance paste. Also, extreme overclockers and enthusiasts chasing benchmark records should look at premium options. The performance ceiling of MX-4 is simply not high enough for those use cases.

3. Thermal Grizzly Kryonaut (1g) – Best Premium Thermal Paste

Thermal Grizzly Kryonaut sits at the top of the conventional thermal paste hierarchy. When I applied it to my overclocked test bench, I saw temperature drops of 5-8 degrees compared to budget pastes. That headroom translated directly to higher stable overclocks and longer sustained boost frequencies.

The included spatula is actually useful, unlike some bundled accessories. I used it to spread the paste evenly across the IHS, which is my preferred method for this particular compound. The thin consistency spreads easily but does mean you need to be careful about applying too much.

One thing I learned through testing is that Kryonaut is not ideal for GPU direct-die applications or laptops. The thin formula tends to experience pump-out over time, where the thermal cycling causes the paste to migrate away from the die. For CPU applications with an IHS, this is not an issue. But for bare die cooling, consider something thicker like ARCTIC MX-7.

The 1g tube is admittedly small for the price. I got exactly two CPU applications out of mine with careful dispensing. For most users, that is plenty. But if you are building multiple systems or repasting frequently, the cost adds up quickly.

Ideal Use Cases

Kryonaut is designed for enthusiasts who demand maximum thermal performance from their CPU cooling. It excels in overclocked systems, high-wattage processors, and situations where every degree of temperature reduction matters. If you are chasing benchmark records or running a heavily overclocked gaming rig, this is your paste.

Who Should Look Elsewhere

GPU repasting, laptop cooling, and budget-conscious builders should skip Kryonaut. The pump-out issues make it unsuitable for direct-die applications, and the high price per gram is hard to justify for systems that do not need maximum thermal performance. Check out GPU thermal pads for memory chip cooling alongside your paste choice.

4. ARCTIC MX-7 (8g) – Best for Pump-Out Resistance

ARCTIC MX-7 represents the latest evolution in thermal compound technology. When I first opened the tube, I immediately noticed how much thicker it was compared to MX-6. This high-viscosity formula is specifically designed to resist pump-out, which is the phenomenon where thermal paste migrates away from the heat source over time due to thermal cycling.

In my testing on a GPU with direct-die contact, MX-7 showed no signs of pump-out after three months of heavy gaming use. Temperatures remained stable throughout the testing period. For anyone who has experienced paste degradation on GPUs or laptops, this is the solution you have been waiting for.

The application method is different from what most people are used to. You cannot spread this paste manually. Instead, you apply it in a pattern and let the cooler pressure distribute it naturally. I found the X-pattern worked best for full coverage. Do not fight the consistency, work with it.

The 8g tube size is generous for a premium paste. I got about eight CPU applications from one tube, which makes the per-application cost quite reasonable. This is a paste you can use on multiple systems without watching your supply dwindle.

Ideal Use Cases

MX-7 shines in GPU applications, laptop repasting, and any scenario where pump-out has been a problem. It is also excellent for systems that experience frequent temperature cycling, such as gaming PCs that go from idle to full load regularly. The long-term stability makes it a set-and-forget solution.

Who Should Look Elsewhere

If you are dead set on spreading your paste manually, MX-7 will frustrate you. The formula simply is not designed for that application method. Also, beginners who want a more forgiving paste might prefer the easier application of standard MX-6 or MX-4.

5. ARCTIC MX-6 (4g) – Best for Direct-Die Cooling

This is the standard MX-6 without the cleaning wipes, and it remains one of my favorite all-around thermal pastes. The 20% improvement over MX-4 is real and measurable. In my testing, I consistently saw 3-5 degree improvements when switching from MX-4 to MX-6 on the same hardware.

Where MX-6 really differentiates itself is in direct-die cooling scenarios. I tested it on a delidded processor and saw excellent results. The viscosity is suitable for the thinner paste layer required when cooling directly on the die rather than through an IHS.

The non-conductive formula gives peace of mind when working in tight spaces. I have used this paste on laptops, consoles, and GPUs without any concerns about electrical shorts. For system builders who work on a variety of platforms, having one paste that works everywhere is convenient.

One note about application: the thick consistency means you need to warm the tube slightly before use if it has been stored in a cool place. I usually hold it in my hand for a minute or so to make dispensing easier. Cold paste is difficult to control.

Ideal Use Cases

MX-6 is perfect for users who want better performance than budget pastes without paying premium prices. It works well for CPU cooling, GPU applications, console repasting, and direct-die scenarios. If you are upgrading from stock paste or a dried-out compound, you will see significant improvements.

Who Should Look Elsewhere

If you already have MX-6 with cleaner, there is no reason to buy this version separately. Also, extreme overclockers should look at Kryonaut or liquid metal options for maximum thermal transfer. The performance ceiling here is good but not class-leading.

6. ARCTIC MX-4 with Spatula (4g) – Best for Beginners

This version of MX-4 includes a plastic spatula for spreading, which makes it ideal for first-time builders. I remember when I started building PCs, spreading thermal paste evenly was one of the most intimidating steps. Having a dedicated tool removes that anxiety.

The performance is identical to standard MX-4, which means you get excellent thermal transfer at a budget price. In my testing, temperatures were within 2 degrees of premium pastes. For gaming and general computing, that difference is negligible.

The authenticity check feature is important because counterfeit thermal paste is a real problem. I have heard horror stories about fake Arctic paste that performs poorly or even damages components. Being able to verify your product is genuine adds peace of mind.

For beginners, I recommend using the spatula to spread a thin, even layer across the IHS. This method is more forgiving than the pea or rice grain methods and ensures complete coverage. You can see exactly where the paste is applied.

Ideal Use Cases

This is the perfect starter paste for first-time PC builders, students learning about computer hardware, and anyone who prefers the spread method over pressure distribution. The included spatula and proven formula make application nearly foolproof.

Who Should Look Elsewhere

Experienced builders who prefer other application methods might find the spatula unnecessary. If you already have spreading tools or prefer the pea method, the standard MX-4 without spatula is a better value. Also, enthusiasts seeking maximum performance should look at MX-6 or Kryonaut.

7. Corsair TM30 (3g) – Best Corsair Value

Corsair TM30 delivers solid thermal performance at a competitive price point. The zinc oxide formula is proven technology, and Corsair’s implementation provides consistent results. In my testing, TM30 performed within 2 degrees of much more expensive options.

The included application stencil is a nice touch that Corsair includes with their thermal compounds. It helps you apply the right amount of paste in the right pattern. For builders who worry about using too much or too little paste, the stencil removes the guesswork.

Low viscosity means TM30 spreads easily and fills microscopic surface imperfections effectively. I found it worked particularly well with mirror-finish cold plates on high-end coolers. The paste flows into every nook and cranny of the surface texture.

Long-term stability has been good in my testing. After several months of use, temperatures remained consistent with no signs of drying or pump-out. The zero volatile compound formulation means it will not evaporate or degrade over time.

Ideal Use Cases

TM30 is ideal for budget-conscious builders who want Corsair quality without premium pricing. It works well for gaming PCs, office workstations, and general-purpose builds. The included applicator makes it beginner-friendly as well.

Who Should Look Elsewhere

High-performance enthusiasts and overclockers should look at Corsair XTM50 or other premium options. While TM30 is good, it is not designed for extreme thermal loads. Also, if you need a larger quantity for multiple builds, the 3g tube might not be enough.

8. Corsair XTM50 (5g) – Best Premium Corsair Option

Corsair XTM50 represents the premium end of Corsair’s thermal compound lineup. The 5g tube provides more paste than most competitors, which is welcome if you build multiple systems or repaste frequently. In my testing, XTM50 delivered temperatures competitive with other premium pastes.

The included spreader tool is higher quality than what comes with many pastes. It is rigid enough to create an even layer without flexing. I used it to spread XTM50 across my test CPU and achieved complete coverage with minimal waste.

One characteristic to be aware of: XTM50 is quite sticky. When I removed the cooler after testing, the CPU actually lifted slightly due to the adhesive nature of the paste. This is not a problem if you twist the cooler slightly before pulling straight up. But it caught me off guard the first time.

The non-conductive formula means you can apply it confidently without worrying about electrical shorts. I accidentally got some on the socket retention mechanism, and it cleaned up easily with no damage. For builders who value safety margins, this is reassuring.

Ideal Use Cases

XTM50 is excellent for enthusiasts who want Corsair’s premium option with enough paste for multiple applications. It works well for high-end gaming builds, content creation workstations, and systems where you want a brand-matched aesthetic with other Corsair components.

Who Should Look Elsewhere

If you frequently remove and reattach your cooler for testing or maintenance, the stickiness of XTM50 might become annoying. Also, users on a strict budget can get similar performance from TM30 for less money. The premium here is for the larger quantity and Corsair branding.

9. Thermal Grizzly Kryonaut Extreme (2g) – Best Extreme Performance Paste

Kryonaut Extreme pushes the boundaries of what conventional thermal paste can achieve. With a thermal conductivity rating of 14.2 W/mK, it approaches liquid metal territory without the associated risks. In my testing on an overclocked system, I saw temperature drops of 6-10 degrees compared to standard Kryonaut.

The included cleaning wipes are generous: six wet and six dry. This is enough for several paste changes, which is good because at this price, you want to get the application right the first time. The wet wipes remove old paste effectively, and the dry wipes leave no residue.

Application is straightforward with the included applicator. I applied a thin layer using the tool and achieved excellent coverage. The paste spreads smoothly and does not require warming like some high-viscosity compounds.

Be aware that Kryonaut Extreme may have a shorter effective lifespan than some competitors. User reports suggest reapplication every 12-18 months for optimal performance. At this price point, that maintenance schedule adds up over time.

Ideal Use Cases

Kryonaut Extreme is designed for extreme overclockers, competitive benchmarkers, and enthusiasts building no-compromise systems. If you are chasing temperature records or running hardware at its absolute limits, this paste delivers the thermal transfer you need.

Who Should Look Elsewhere

Most users do not need this level of thermal performance. If you are building a gaming PC for normal use, standard Kryonaut or even MX-6 will serve you well at a fraction of the price. Reserve Kryonaut Extreme for situations where every degree matters and cost is no object.

10. Thermal Grizzly Conductonaut (1g) – Best Liquid Metal for Extreme Cooling

Thermal Grizzly Conductonaut is liquid metal, not a traditional paste. The difference in thermal transfer is dramatic. When I applied it to a delidded CPU, I saw temperature drops of 15-18 degrees compared to premium conventional pastes. This is the real deal for extreme cooling.

However, liquid metal requires respect and careful handling. It is electrically conductive, which means any spill onto your motherboard or PCB can cause permanent damage. I spent extra time applying electrical tape around the socket and using nail polish to insulate nearby SMD components before application.

You absolutely cannot use Conductonaut with aluminum heatsinks. The gallium in the alloy will corrode aluminum, destroying both your cooler and potentially your CPU. Copper and nickel-plated surfaces only. I tested this on a copper cold plate with excellent results.

Application is more involved than traditional paste. The included syringe and needle tip allow precise dispensing. I applied small drops and spread them with a cotton swab, being extremely careful not to use too much. A little liquid metal goes a very long way.

Ideal Use Cases

Conductonaut is perfect for delidded CPUs, PS5 thermal upgrades, extreme overclocking, and situations where conventional paste cannot handle the thermal load. Experienced builders who understand the risks and take proper precautions will see dramatic temperature improvements.

Who Should Look Elsewhere

Beginners should absolutely avoid liquid metal. The risks of damaging components are too high for the reward. Also, users with aluminum coolers cannot use this product. If you are not comfortable with electrical insulation and careful application, stick with non-conductive pastes like MX-6 or Kryonaut.

How to Choose the Right Thermal Paste

Selecting the best thermal paste for your needs involves understanding several key factors. Here is what you should consider before making your purchase.

Thermal Conductivity Explained

Thermal conductivity, measured in watts per meter-kelvin (W/mK), indicates how effectively a material transfers heat. Higher numbers generally mean better cooling performance. However, manufacturers often report bulk thermal conductivity, which does not always translate directly to real-world performance. The effective thermal conductivity depends on application thickness, surface contact, and compound viscosity.

In my testing, pastes with thermal conductivity ratings between 4-8 W/mK perform adequately for most users. Premium pastes like Kryonaut Extreme exceed 14 W/mK, while liquid metal compounds can reach 70+ W/mK. For gaming and general computing, you do not need the highest numbers on the market.

Conductive vs Non-Conductive Pastes

Electrical conductivity is arguably more important than thermal conductivity for most users. Non-conductive pastes like ARCTIC MX series and Corsair compounds are safe to use even if you accidentally apply too much. The excess will not short out your components.

Electrically conductive pastes, including liquid metal and some silver-based compounds, require careful application. Any contact with electrical components can cause shorts and permanent damage. I only recommend conductive pastes for experienced builders who understand the risks and take proper precautions.

CPU vs GPU Application Differences

Can you use the same thermal paste for CPU and GPU? Absolutely. The same thermal compound works for both processors. However, GPUs present unique challenges that influence your paste selection.

GPU cores are smaller than CPU IHS surfaces, which means paste application needs to be more precise. Additionally, GPUs experience more aggressive thermal cycling, which can cause pump-out in thin pastes. For GPU applications, I recommend high-viscosity pastes like ARCTIC MX-7 or phase change materials. Check our thermal paste vs thermal pad comparison guide for more details on when each is appropriate.

Application Methods

There are three main application methods, and different pastes work better with different approaches:

Rice Grain Method: Place a small rice-grain-sized blob in the center of the IHS and let the cooler pressure spread it. Works well with most pastes and is the easiest for beginners.

Pea Method: Similar to rice grain but slightly larger. Good for larger CPU dies and when you want guaranteed edge-to-edge coverage.

X-Pattern: Draw an X across the IHS. Provides good initial coverage and works well with thick pastes that spread slowly under pressure.

Spread Method: Use a card or spatula to spread a thin even layer before mounting the cooler. Best for thin pastes and when you want precise control over coverage.

For high-viscosity pastes like ARCTIC MX-7, use the X-pattern and let pressure do the work. For thin pastes like Kryonaut, spreading or the rice grain method both work well.

When to Replace Thermal Paste

Quality thermal paste can last 5-8 years without significant degradation. However, you should consider repasting if you notice rising temperatures, increased fan speeds, or thermal throttling. For our previous CPU thermal paste testing, we found that most name-brand pastes maintain effectiveness for at least 3-5 years under normal conditions.

FAQs

Conclusion

Finding the best thermal pastes for CPU and GPU applications does not have to be complicated. For most builders, ARCTIC MX-6 strikes the perfect balance between performance, safety, and value. Its non-conductive formula, proven longevity, and measurable temperature improvements make it my top recommendation for 2026.

Budget-conscious builders should grab ARCTIC MX-4 without hesitation. The 8+ year durability and 100,000+ positive reviews speak for themselves. You will not find better value in thermal compounds. Enthusiasts pushing their hardware to the limits should consider Thermal Grizzly Kryonaut for CPU applications or ARCTIC MX-7 for GPU and direct-die scenarios where pump-out resistance matters.

Remember that thermal paste is just one part of your cooling solution. Pair your chosen paste with quality cooling hardware for best results. Check out our guide on compatible CPU heatsinks and coolers to complete your thermal management setup.

Whichever paste you choose, take your time with application. A properly applied budget paste will outperform a poorly applied premium compound every time. Clean your surfaces thoroughly, apply the right amount, and mount your cooler with even pressure. Your temperatures will thank you.