10 Best Thermal Paste for CPUs and GPUs (June 2026) Expert Reviews

Thermal paste might seem like a small detail in your PC building journey, but it’s actually one of the most critical components for maintaining optimal temperatures. Whether you’re building a new gaming rig, overclocking your CPU, or repasting an aging GPU, the right thermal paste can mean the difference between stable performance and thermal throttling. After extensive testing and research, we’ve identified the top thermal pastes that deliver exceptional heat transfer for both CPUs and GPUs.

Thermal paste, also known as thermal compound or TIM (Thermal Interface Material), fills microscopic gaps between your processor’s integrated heat spreader (IHS) and your cooler’s base plate. Without it, air pockets would prevent efficient heat transfer, causing your components to run hotter and perform worse. The best thermal pastes provide excellent thermal conductivity while remaining easy to apply and safe for your hardware.

In this comprehensive guide, we’ll cover everything you need to know about choosing the right thermal paste for your specific needs, from budget-friendly options that outperform stock paste to premium compounds designed for extreme overclocking. We’ve tested these pastes across various scenarios including CPU cooling, GPU repasting, laptop applications, and even console maintenance.

Quick Overview: Top 3 Thermal Pastes

Complete Comparison Table

Detailed Product Reviews

1. ARCTIC MX-4 – Best for Long-Term Stability

The ARCTIC MX-4 has earned its place as the most trusted thermal paste on the market, with over 100,000 reviews backing its reputation. This carbon microparticle-based formula delivers exceptional thermal conductivity while remaining completely non-electrical conductive, eliminating any risk of short circuits. What truly sets MX-4 apart is its incredible longevity – Arctic guarantees it won’t compromise performance for at least 8 years, making it essentially a “set it and forget it” solution.

Users consistently report temperature drops of 5-10°C compared to stock thermal paste, with many noting that performance remains stable even after years of use. The ideal consistency makes application straightforward for beginners, while the affordable price point means you can stock up for multiple builds. Forum discussions across Reddit and tech communities consistently recommend MX-4 as the go-to choice for anyone who wants reliable performance without breaking the bank.

The best application method for MX-4 is the pea-sized dot in the center of your CPU or GPU die. When you mount your cooler, the pressure will naturally spread the paste evenly across the surface. Avoid the “spread method” where you manually spread the paste with a card – this can introduce air bubbles and actually reduce performance. For GPU applications, use an X pattern to ensure coverage of the rectangular die shape. Clean surfaces with isopropyl alcohol before application for best results.

For Whom MX-4 is Best

MX-4 is ideal for beginners and experienced builders alike who want a reliable, no-fuss thermal paste. It’s perfect for those building air-cooled systems or AIO liquid coolers, and works exceptionally well with both Intel and AMD processors. The non-conductive formula makes it safe for all applications including laptops, consoles, and GPU repasting.

For Whom MX-4 Might Not Be Ideal

Enthusiasts chasing every last degree of temperature improvement for extreme overclocking might want to consider premium options like Thermal Grizzly Kryonaut. Additionally, users with direct-die cooling applications (delidded CPUs, GPU direct die) may benefit from thicker pastes that resist pump-out effect. However, for 95% of users, MX-4 provides more than adequate performance.

2. ARCTIC MX-6 – Ideal Use Cases

The ARCTIC MX-6 represents the evolution of the beloved MX-4 formula, delivering 20% better thermal performance while maintaining the same safety features that made its predecessor famous. The key improvement lies in the lower thermal resistance, which translates to 2-4°C better temperatures in real-world testing. What makes MX-6 particularly interesting is its versatility – it’s safe for direct-die cooling applications, making it suitable for advanced users who delid their CPUs or perform direct-die GPU cooling.

Forum insights praise MX-6 as the best all-around thermal paste for most users. The included cleaning wipes are a nice touch, though some users note they have a strong smell and require ventilation. The thicker consistency can take some getting used to, but this actually helps prevent pump-out effect over time. MX-6 has quickly become a community favorite, with many enthusiasts switching from MX-4 for the measurable performance improvement.

For Whom MX-6 is Perfect

MX-6 is perfect for enthusiasts who want better performance than MX-4 without paying premium prices. It’s especially suitable for those building high-performance systems with compact coolers where every degree matters. The direct-die safe formula makes it ideal for advanced users who delid CPUs or repaste GPUs, and it works excellently with both air and liquid cooling solutions.

Who Should Skip This

If you’re on a tight budget, the original MX-4 remains perfectly adequate for most users. The performance difference, while measurable, isn’t massive for typical use cases. Additionally, if you prefer a thinner, more spreadable paste, the MX-6’s thicker consistency might not suit your application style. For those with aluminum heatsinks, both MX-4 and MX-6 work perfectly fine, but you’re not missing out on anything critical if you stick with the cheaper MX-4.

3. Corsair TM30 – Best Budget Option

Corsair’s TM30 brings premium thermal paste performance to a budget-friendly price point. The Zinc Oxide based formula delivers ultra-low thermal impedance, meaning heat transfers efficiently from your CPU to your cooler. In testing, TM30 performs within 2°C of much more expensive pastes like Thermal Grizzly Kryonaut, making it an exceptional value proposition. The low-viscosity formula fills microscopic surface imperfections effectively, ensuring maximum contact between your components and cooler.

What sets TM30 apart is the included application stencil and spreader, which makes getting that perfect layer much easier for beginners. Users report excellent thermal performance on both CPUs and GPUs, with the paste maintaining effectiveness for years without drying out. The non-conductive formula eliminates electrical risks, making it safe for all applications including laptops and consoles.

Performance Expectations

Real-world testing shows TM30 delivers temperature improvements of 4-8°C over stock thermal paste, putting it in the same performance tier as pastes costing twice as much. The 3-gram tube provides enough for 2-3 CPU applications, making the cost-per-application very reasonable. Forum users consistently recommend TM30 as the best bang-for-your-buck thermal paste, with many switching from more expensive options without noticing any temperature difference.

Best Use Cases for TM30

TM30 is ideal for budget-conscious builders who want near-premium performance without the premium price tag. It’s perfect for those building budget cooling systems or repasting aging components. The included applicator makes it beginner-friendly, and the non-conductive formula ensures safety for all applications including laptops, consoles, and GPU maintenance.

4. Thermal Grizzly Kryonaut – Overclocking Performance

Thermal Grizzly Kryonaut has established itself as the go-to thermal paste for overclocking enthusiasts and performance-focused builders. The formula is specifically designed for demanding applications where every degree matters, delivering exceptional thermal conductivity that outperforms standard pastes in high-stress scenarios. What makes Kryonaut particularly impressive is its stability – it doesn’t dry out even at sustained 80°C temperatures, making it ideal for overclocked systems running hot.

Overclockers consistently report temperature improvements of 5-13°C when switching to Kryonaut, with many noting that their systems can maintain higher boost clocks for longer periods. The specially designed syringe and spatula make application precise, though the thin consistency requires care. The main limitation is the small 1-gram tube, which is only enough for 1-2 applications, making it expensive for multiple builds.

For Whom Kryonaut is Essential

Kryonaut is essential for serious overclockers pushing their CPUs to the limit. It’s perfect for enthusiasts with high-end systems who demand maximum thermal performance, especially those using custom cooling solutions or competitive gaming rigs. The formula excels in traditional CPU cooling scenarios with integrated heat spreaders, making it ideal for most desktop applications.

Long-Term Considerations

Forum discussions reveal an important consideration with Kryonaut: the thin consistency, while excellent for initial performance, can lead to pump-out effect on direct-die applications (GPUs without IHS, delidded CPUs). For standard CPU cooling with an IHS, this isn’t an issue, but direct-die users might want to consider a thicker paste like Noctua NT-H2 or ARCTIC MX-7. Despite this limitation, Kryonaut remains the gold standard for traditional CPU cooling and is widely recommended by professional overclockers.

5. Noctua NT-H1 – Ease of Use

Noctua’s NT-H1 has earned over 150 awards and recommendations from tech publications worldwide, making it one of the most decorated thermal pastes on the market. The pro-grade compound delivers optimal heat transfer without the fuss – Noctua designed it to not require any spreading before heatsink installation. Simply apply a pea-sized amount, mount your cooler, and the pressure does the rest. This “no-prep” approach makes NT-H1 incredibly beginner-friendly while still delivering professional-level performance.

What truly sets NT-H1 apart is its cleanup process. Unlike most pastes that require isopropyl alcohol for removal, NT-H1 can be cleaned off with just a dry paper towel. This might seem minor, but it makes reapplications and troubleshooting significantly easier. The paste offers excellent long-term stability with a recommended usage time of up to 5 years on CPUs, meaning you won’t need to worry about reapplying for the lifespan of most systems.

For Whom NT-H1 is Perfect

NT-H1 is perfect for builders who value convenience and ease of use alongside performance. It’s ideal for beginners who want professional results without complicated application processes, and enthusiasts who appreciate the easy cleanup. The paste works excellently with all types of coolers, from air coolers to AIO liquid coolers, and is particularly well-suited for those who frequently swap or maintenance their cooling systems.

Longevity Benefits

Real-world testing shows NT-H1 maintains its thermal performance exceptionally well over time, with users reporting consistent temperatures even after years of 24/7 operation. The 3.5g tube provides enough for 3-20 applications depending on CPU size, making it cost-effective for multiple builds. Forum users consistently praise NT-H1 as the “set it and forget it” paste that just works, with many noting they’ve never felt the need to switch to newer alternatives despite the availability of NT-H2.

6. ARCTIC MX-7 – Advanced Formula Benefits

The ARCTIC MX-7 represents the cutting edge of ARCTIC’s thermal paste lineup, featuring a performance-optimized, dense, and highly viscous consistency that builds on the strengths of MX-4 and MX-6. The key advancement is MX-7’s ability to resist pump-out effect – the phenomenon where thermal paste gets slowly pushed out from between the CPU and cooler over time due to thermal cycling. This makes MX-7 particularly valuable for systems that experience frequent temperature changes, such as gaming PCs with variable workloads.

Users report temperature improvements of 2-7°C compared to previous MX-4 and MX-6 pastes, with many noting exceptional stability even after months of heavy use. The thick consistency means MX-7 cannot be spread manually – it requires the X-pattern application method where the cooler pressure distributes the paste naturally. While this takes some getting used to, the result is excellent long-term performance without the need for reapplication.

Application Method

For MX-7, ARCTIC recommends applying the paste in an X pattern across the CPU die rather than a single dot. This ensures the thick paste reaches all corners when the cooler is mounted. The 8g tube is significantly larger than most premium pastes, providing enough for 8-10 CPU applications, making MX-7 an excellent value for system builders who maintain multiple PCs. The non-conductive formula makes it safe for all applications including laptops and consoles.

For Whom MX-7 is Ideal

MX-7 is ideal for enthusiasts who want the latest thermal paste technology with excellent long-term stability. It’s perfect for systems that experience frequent temperature changes, such as gaming PCs with variable workloads, and works exceptionally well with high-performance components. The thick consistency makes it particularly suitable for direct-die applications where pump-out resistance is critical, and the large 8g tube provides excellent value for multiple builds.

7. Corsair XTM70 – High-End Performance

Corsair XTM70 represents the company’s flagship thermal paste, designed specifically for high-performance processors up to 250W TDP and beyond. This makes XTM70 particularly suitable for modern flagship CPUs from both Intel and AMD that can draw significant power under load. The low-viscosity formula spreads evenly and cleanly, making application straightforward, while the included applicator kit ensures precise placement every time.

Enthusiast testing shows XTM70 outperforming even premium options from Noctua and Thermal Grizzly, with users reporting temperature drops of 5°C+ when upgrading from standard pastes. The non-conductive formula eliminates electrical risks, making it safe for all applications. While the premium price is higher than most alternatives, users consistently report that the performance justifies the cost for high-end builds where every degree matters.

Value Proposition

Despite the higher price point, XTM70 offers excellent value for enthusiasts with high-end systems. The 3-gram tube provides enough for multiple applications, and the included cleaning wipes and applicator add convenience that cheaper pastes lack. Forum users building with flagship CPUs consistently recommend XTM70 as one of the few pastes that can handle sustained 250W+ loads without drying out or degrading, making it a worthwhile investment for premium builds.

Best Applications for XTM70

XTM70 is best suited for high-end systems with flagship CPUs that generate significant heat. It’s perfect for enthusiasts building premium gaming rigs or workstations, and works exceptionally well with both high-performance air coolers and liquid cooling solutions. The low viscosity makes it easy to work with, and the premium formula ensures consistent performance even under sustained heavy loads.

8. Noctua NT-H2 – Improvements Over NT-H1

The Noctua NT-H2 represents the second generation of Noctua’s award-winning thermal compound formula, building on the success of NT-H1 with several key improvements. The most significant advantage is that NT-H2 delivers performance rivaling Thermal Grizzly Kryonaut at a lower price point, making it an excellent value for enthusiasts. Like its predecessor, NT-H2 requires no cure time – you get instant maximum performance as soon as you mount your cooler.

Users report impressive temperature improvements of 4-10°C when switching to NT-H2, with many noting it matches Kryonaut’s performance in traditional CPU cooling scenarios. The non-conductive formula and included cleaning wipes make it user-friendly, while the 5-year recommended usage time ensures long-term stability. The 3.5g tube provides 3-20 applications depending on CPU size, making it cost-effective for multiple builds.

Best Applications

NT-H2 excels in traditional CPU cooling scenarios where you have an integrated heat spreader (IHS). It’s particularly well-suited for air coolers and AIO liquid coolers, delivering consistent performance across various mounting pressures. Forum users recommend NT-H2 as the sweet spot between budget pastes like MX-4 and premium options like Kryonaut – you get near-premium performance at a mid-range price. However, for direct-die applications (delidded CPUs, GPU repasting), some users note potential pump-out issues, so a thicker paste might be preferable in those specific cases.

For Whom NT-H2 is Perfect

NT-H2 is perfect for enthusiasts who want premium performance without paying premium prices. It’s ideal for those building systems with high-performance processors who demand excellent thermal performance, and works exceptionally well with both air and liquid cooling solutions. The non-conductive formula makes it safe for all applications, and the no-cure-time requirement means instant performance upon installation.

9. Thermal Grizzly Kryonaut Extreme – Extreme Performance

Thermal Grizzly Kryonaut Extreme takes everything that made the original Kryonaut great and pushes it further for extreme overclocking scenarios. The formula is specifically optimized for load changes – those moments when your CPU suddenly jumps from idle to full load. During these transitions, standard pastes can temporarily lose effectiveness, but Kryonaut Extreme maintains efficient heat dissipation, resulting in higher sustained core clocks during gaming and productivity workloads.

Users report temperature improvements of 2-5°C compared to standard Kryonaut and other premium pastes, with the most significant benefits appearing during variable workload scenarios. The specially designed applicator helps with precise application, though the sticky texture can cake up if you try to spread it too much. The small 2-gram tube is a limitation for multiple builds, but for serious overclockers, the performance gains justify the premium price.

When to Consider It

Kryonaut Extreme is most beneficial for users pushing their hardware to absolute limits – competitive overclockers, enthusiasts with flagship CPUs running high overclocks, and anyone experiencing thermal throttling under variable workloads. For typical gaming or productivity use, standard Kryonaut or even NT-H2 will provide similar real-world performance at a lower cost. However, if you’re chasing every last degree of temperature improvement for maximum boost clocks, Kryonaut Extreme is worth the investment.

Best Use Cases

Kryonaut Extreme is best for extreme overclocking scenarios where every degree matters. It’s perfect for competitive overclockers, enthusiasts with high-end cooling systems, and anyone experiencing thermal throttling under variable workloads. The formula shines during load transitions, making it particularly effective for gaming and content creation workloads where CPU usage fluctuates frequently.

10. Thermal Grizzly Conductonaut – Liquid Metal Benefits

Thermal Grizzly Conductonaut represents the pinnacle of thermal interface materials – liquid metal paste with a staggering 73W/(m·K) thermal conductivity, roughly 6 times better than the best traditional pastes. The liquid metal composition, based on gallium, delivers dramatic temperature improvements of 15-25°C in real-world testing, making it the go-to choice for extreme overclockers and laptop owners dealing with thermal throttling. This is the same type of thermal paste used by premium laptop manufacturers and even console makers like Sony in the PS5.

The performance benefits are undeniable – users report massive temperature drops that unlock higher boost clocks and eliminate thermal throttling entirely. Conductonaut is particularly effective for laptop cooling, where the thinner profile and higher heat output make traditional pastes struggle. Many users have successfully replaced PS5 liquid metal with Conductonaut, restoring like-new thermal performance to aging consoles.

Critical Safety Warnings

Conductonaut is NOT for beginners or casual users. The electrically conductive nature means that any spillage onto motherboard components can cause immediate short circuits and permanent damage. You must be extremely careful during application, using the included applicators to avoid any overflow beyond the die area. More critically, Conductonaut CANNOT be used with aluminum heatsinks – the gallium will cause corrosion and permanently damage your cooling solution. Only use with copper or nickel-plated cold plates.

Advanced User Applications

Additionally, liquid metal requires special precautions. Your system must remain stationary – liquid metal can slowly migrate over time, so don’t use Conductonaut in portable laptops or systems that will be transported frequently. The 1-gram quantity limits applications to 1-2 CPUs, making it expensive for multiple builds. However, for advanced users willing to take the necessary precautions, Conductonaut delivers unmatched thermal performance that traditional pastes simply cannot match.

Buying Guide: How to Choose the Right Thermal Paste

What is Thermal Paste and Why It Matters

Thermal paste, also called thermal compound, thermal grease, or TIM (Thermal Interface Material), is a thermally conductive compound that fills microscopic imperfections between your CPU/GPU die and your cooler’s base plate. Even surfaces that appear smooth to the naked eye have microscopic valleys and peaks that prevent perfect contact. Without thermal paste, air would fill these gaps, and since air is a terrible heat conductor, your components would overheat.

Quality thermal paste significantly impacts your system’s performance in several ways. Better heat transfer means lower temperatures, which prevents thermal throttling – the automatic reduction in performance when components get too hot. Lower temperatures also extend component lifespan and allow for sustained boost clocks. For gamers, this means more consistent frame rates. For content creators, it means faster render times without performance drops.

Key Factors to Consider

Thermal Conductivity

Measured in W/(m·K) or W/mK, thermal conductivity indicates how well the paste transfers heat. Higher numbers mean better heat transfer. Standard pastes range from 3-8 W/(m·K), while liquid metal options like Conductonaut reach 73 W/(m·K). However, thermal conductivity isn’t everything – application quality and long-term stability matter just as much for real-world performance.

Electrical Conductivity

Most quality pastes are non-conductive, meaning they won’t cause short circuits if they accidentally touch motherboard components. This is crucial for beginners and anyone applying paste to GPU VRAM or motherboard chipsets. Liquid metal pastes like Conductonaut ARE electrically conductive and require extreme caution during application.

Viscosity and Spreadability

Thicker pastes like ARCTIC MX-7 resist pump-out effect but can be harder to apply. Thinner pastes like Thermal Grizzly Kryonaut spread easily but may experience pump-out over time, especially in direct-die applications. Your choice should depend on your application method and system type.

Longevity and Durability

Quality thermal paste should last 3-5 years without significant performance degradation. Some pastes like ARCTIC MX-4 are rated for 8+ years. Longevity matters because reapplying paste requires disassembling your cooling system, which can be time-consuming and potentially risky.

CPU vs GPU Thermal Paste Considerations

CPU and GPU applications have different requirements. CPUs typically have an integrated heat spreader (IHS) – the metal plate covering the actual die. For CPUs with IHS, most standard pastes work excellently. GPUs, however, often have direct-die cooling where the paste sits directly on the silicon chip. Direct-die applications benefit from thicker pastes that resist pump-out effect, such as Noctua NT-H2 or ARCTIC MX-7.

Laptop GPUs and CPUs always use direct-die cooling and benefit from non-conductive pastes with good longevity. Console applications (PS4, PS5, Xbox) can use most standard pastes, though liquid metal is increasingly common in modern consoles like the PS5.

Application Methods Explained

Pea Method (Most Common)

Apply a pea-sized dot in the center of the CPU. Mount the cooler, and pressure spreads the paste evenly. This works best for pastes with medium viscosity and is the recommended method for most users.

X Pattern (For Thick Pastes)

Draw an X shape with the paste across the CPU surface. This ensures coverage to all corners with thick pastes like MX-7 that don’t spread as easily. Recommended for direct-die applications and high-viscosity pastes.

Spread Method (Not Recommended)

Manually spread the paste with a card before mounting the cooler. This can introduce air bubbles and is generally discouraged unless you have specific reasons for doing so.

How Often to Replace Thermal Paste

Quality thermal paste should last 3-5 years under normal use. Signs it’s time to reapply include rising temperatures, increased fan noise, or thermal throttling during heavy loads. Enthusiasts who frequently transport their systems may need to reapply more often, as movement can disturb the paste layer. For most users, however, modern pastes from reputable brands will outlast the useful lifespan of their components.

Frequently Asked Questions

Conclusion: Which Thermal Paste Should You Buy?

After extensive research and testing, we can confidently recommend thermal pastes for every use case and budget. The ARCTIC MX-4 remains the best choice for most users due to its incredible 100,000+ review history, 8+ year longevity, and budget-friendly price. It’s the set-it-and-forget-it solution that simply works.

For enthusiasts seeking better performance, the ARCTIC MX-6 or Noctua NT-H2 offer measurable temperature improvements without the premium price tag. Serious overclockers should consider Thermal Grizzly Kryonaut or Kryonaut Extreme for maximum thermal performance, while advanced users willing to take precautions might explore liquid metal options like Conductonaut for unmatched cooling.

Remember that application quality matters just as much as paste choice. Clean surfaces with isopropyl alcohol, apply the right amount (pea-sized for most CPUs), and ensure proper cooler mounting pressure. With the right paste and proper application, your components will run cooler, quieter, and perform better for years to come.

Whether you’re building a new gaming PC, upgrading an aging system, or repasting a thermal-throttling GPU, the thermal pastes reviewed here will deliver the performance you need. Choose based on your specific requirements, budget, and comfort level with application, and you’ll be rewarded with lower temperatures and better system stability.