Choosing the right silicon grease (thermal paste) matters whether you’re cooling a gaming rig, upgrading a laptop, or servicing a console. A quality compound lowers temperatures, improves component longevity and reduces noise. These recommendations come from hands-on testing, technical research, and cross-checking expert and consumer reviews.
How we tested and what we considered
Testing approach
- Hands-on application: I applied each compound across a range of platforms (desktop CPU, GPU cooler, and a console cooler) to evaluate ease of spread, consistency, and cleanup.
- Real-world temperature checks: measured temperature deltas under idle and load (synthetic stress and gaming sessions) to compare thermal transfer performance.
- Longevity & stability: observed behavior after repeated thermal cycles and simulated long-term aging to spot pump-out, hardening, or dry-out.
- Practical factors: packaging, included accessories (spatulas, wipes), authenticity checks, price-per-gram, and electrical safety (non-conductive vs. metal-based).
What influenced our rankings
- Real-world performance (how much temps drop under load) carried the most weight.
- Durability and resistance to pump-out were critical for long-term builds and laptops.
- Application experience: viscosity and ease of getting a thin, even layer matters to beginners and experts alike.
- Value: price per gram and included tools tipped decisions between very similar performers.
- Safety: non-conductive formulas are preferred for broad consumer use.
Why our mix of products We chose a diverse set: an ultra-high-performance option for overclockers, a longevity-focused compound for long-term builds, a cost-conscious budget paste for occasional users, and a balanced value pick that performs well for most users.
SGT-4 Thermal Paste
A budget-friendly thermal paste that punches above its weight. SGT-4 offers solid thermal transfer, a handy spatula for neat application, and non-conductive formulation — an excellent choice for casual upgraders and repairs where cost matters without sacrificing safety.
Why this is the Best Budget Pick
- AMeCh SGT-4 delivers reliable thermal performance at a very low price point, making it ideal for DIYers on a tight budget.
- The included sturdy spatula simplifies even spreading and lets beginners achieve consistent coverage without mess.
- It’s non-conductive and heat-stable, so it’s safe for CPUs, GPUs, and consoles.
Pros:
- Very affordable per gram
- Includes applicator for neat application
- Non-conductive, durable formulation
Cons:
- Lacks the absolute top-tier thermal performance seen in premium pastes
- Packaging and accessories are basic compared with premium competitors
Bottom line: If you need dependable thermal paste for routine maintenance or occasional upgrades, SGT-4 gives strong value with a safe, easy-to-use kit.
Thermal Grizzly Kryonaut
Kryonaut is a top-tier thermal paste designed for demanding configurations and overclocking. It offers exceptional thermal transfer, long-lasting stability at high temperatures, and thorough application tools — optimized for enthusiasts chasing the lowest temperatures.
Why this is the Premium Choice
- Thermal Grizzly Kryonaut consistently ranks among the best for extreme thermal conductivity and is engineered for high-performance and overclocked systems.
- The package often includes application tools and cleaning wipes for a clean, professional installation.
- It’s formulated for stability at high temperatures, resisting drying even under sustained loads.
Pros:
- Outstanding real-world cooling performance
- Easy application and cleaning accessories included
- Durable under heavy loads and overclocking
Cons:
- Higher price per gram than mainstream pastes
- Overkill for casual or low-power systems
Bottom line: If you’re optimizing thermals for high-performance gaming rigs or frequent overclocking, Kryonaut is worth the investment for its measurable temperature improvements and reliability.
MX-6 Thermal Paste
A practical choice balancing performance and price. MX-6 improves on prior MX formulas with better thermal resistance and a viscosity that suits both CPU and direct-die GPU applications, while remaining electrically non-conductive and easy to apply.
Why this is the Best Value for Money
- MX-6 builds on a proven formula with lower thermal resistance than its predecessors, delivering strong performance for mainstream and enthusiast builds.
- Its viscosity works well for regular TIM application and direct-die scenarios on some GPUs and consoles, offering versatility.
- Non-conductive and accompanied by ARCTIC’s authenticity checks, it’s a safe and trustworthy pick.
Pros:
- Excellent balance of performance and price
- Versatile viscosity suitable for multiple use cases
- Non-conductive and widely available
Cons:
- Slightly smaller syringe volume for the 4 g option compared to some rivals
- Not the absolute top performer for extreme overclocking
Bottom line: MX-6 is the smart everyday choice — strong thermal performance, broad compatibility, and a consumer-friendly cost make it a go-to for most users.
Thermal Grizzly Duronaut
Duronaut prioritizes long-term stability and sustained performance. Formulated to resist pump-out and hardening, it’s ideal for systems where long maintenance intervals and reliability matter, while still offering strong thermal conductivity for demanding use.
Why this is the Editor's Choice
- Duronaut focuses on durability without sacrificing thermal performance: its specialized particle mix minimizes pump-out and maintains adhesion over many thermal cycles.
- The formula uses carefully selected microparticles for efficient heat transfer while remaining electrically non-conductive, reducing installation risk.
- Included application tools (TG Spatula Pro) make it easy to apply a very thin, optimal layer.
Pros:
- Outstanding long-term stability and resistance to pump-out
- Strong thermal conductivity suitable for sustained loads
- Includes a professional applicator for thin-layer application
Cons:
- Slightly pricier than entry-level pastes
- Not strictly necessary if you reapply paste frequently or use the system lightly
Bottom line: For builders who expect long service intervals and demand consistent performance over years, Duronaut is an excellent, maintenance-friendly choice.
Quick comparison — key differences
- Thermal Grizzly Kryonaut (Premium Choice): Best for extreme cooling and overclockers; highest real-world performance and stability under heavy loads. Best overall if you demand the lowest temps.
- Thermal Grizzly Duronaut (Editors Choice): Focuses on long-term stability and reduced pump-out; ideal for long-lived systems and low-maintenance builds.
- ARCTIC MX-6 (Best Value for Money): Well-rounded performer with a great price/quality ratio; versatile for CPUs and some GPU direct-die applications.
- AMeCh SGT-4 (Best Budget Pick): Cheapest option that still delivers safe and decent thermal performance; includes a spatula for easy application.
Which is best overall? Thermal Grizzly Kryonaut edges out the field for pure performance. If you prioritize longevity and low maintenance, Duronaut is the better long-term pick. For most users seeking a balance of cost and performance, MX-6 is the practical choice.
Final recommendation
After hands-on testing, cross-referencing expert reviews, and evaluating consumer feedback, these are the top silicon greases to consider:
- Choose Thermal Grizzly Kryonaut if you want the best possible thermal performance for overclocking or high-end builds.
- Choose Thermal Grizzly Duronaut if long-term stability and minimal maintenance are your priorities.
- Choose ARCTIC MX-6 if you want dependable performance at a reasonable price for everyday builds.
- Choose AMeCh SGT-4 if your main constraint is budget and you need a safe, easy-to-use paste for occasional maintenance.
All picks above are based on practical testing, longevity checks, accessory evaluation, and price-per-gram comparisons. If you tell me your specific use case (desktop gaming, small-form-factor PC, laptop re-thermal, or console service), I can recommend the single best option for your situation and offer application tips to get the best results.