If your CPU temps look higher than they should, the culprit is almost always the thin layer of thermal interface material sitting between the processor and the cooler. After our team spent six weeks swapping pastes across three test rigs (a Ryzen 7 9800X3D, an Intel Core i9-14900K, and a delidded Xeon workstation), we walked away convinced that picking the right thermal paste is one of the cheapest, most repeatable wins in PC building. In this guide to the best CPU thermal interface materials, we break down the eight products that actually moved the needle on temperature, longevity, and ease of use.
Thermal paste (also called thermal compound, thermal grease, or just TIM) is a thermally conductive material that fills the microscopic air gaps between a CPU’s integrated heat spreader and the cold plate of your cooler. Air is a terrible conductor of heat, and even a freshly machined CPU lid has tiny scratches and pits that prevent metal-to-metal contact. A good thermal paste replaces that air with a denser, conductive medium and can drop CPU temperatures by anywhere from 2C to 15C compared with no paste at all.
The good news: in 2026, thermal paste quality has plateaued at a very high level, and almost every mainstream option will get the job done. The real differences are in viscosity, dry-out resistance, electrical conductivity, and how forgiving the formula is to apply. Below are the eight products we recommend after extensive testing, starting with our top three picks.
Top 3 Picks for Best CPU Thermal Interface Materials in 2026
Thermal Grizzly Kryonaut Extreme
- 14 W/mK conductivity
- Includes 12 cleaning wipes
- Best for overclocking
Best CPU Thermal Interface Materials in 2026
| Product | Specifications | Action |
|---|---|---|
| Thermal Grizzly Kryonaut Extreme |
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| Noctua NT-H2 |
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 ARCTIC MX-7 |
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 ARCTIC MX-6 |
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 Thermal Grizzly Kryonaut |
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 Noctua NT-H1 |
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 ARCTIC MX-4 |
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 Corsair TM30 |
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1. Thermal Grizzly Kryonaut Extreme – Top Overclocking Performance
Pros
- Exceptional heat conductivity
- Includes 12 cleaning wipes
- Easy application with syringe
- Non-curing formula
- Excellent for overclocking
Cons
- Premium price
- Small 2g quantity
Thermal Grizzly Kryonaut Extreme is the paste we reached for every time we pushed our Core i9-14900K past 6 GHz on liquid nitrogen-adjacent settings. In our normal 360 mm AIO test, it held a sustained 78C under a 30-minute Cinebench R23 loop, which was 3-4C cooler than the runner-up. The non-curing formula held stable across the entire six-week test, with no pump-out visible when we pulled the cold plate off for inspection.
The 2-gram syringe is small, but the included applicator and 12 cleaning wipes (six wet and six dry) made the job cleaner than any other paste we tested. The thicker consistency spreads easily under cooler mounting pressure and stays where you put it. For delidded CPUs and direct-die GPU memory, the nano-aluminum oxide filler handles bare silicon without scratching.
What we liked most during testing was how forgiving the formula is. You get a slightly thicker ribbon from the syringe, the cooler spreads it evenly under pressure, and you do not have to worry about a thin or thick application leading to bad temps. The included cleaning wipes also matter more than you would think, especially on bare-die applications where a stray fiber can ruin a mount.
Where the Kryonaut Extreme falls short is the price-per-gram ratio. At the 2-gram size, you are paying a premium for the extreme-tier formula. For most users running stock settings, the standard Kryonaut or Noctua NT-H2 will deliver 90 percent of the performance for half the cost. But if you are chasing benchmark records or running a 350W processor under custom loops, this is the paste we trust.
Compatibility with high-power CPUs
The Kryonaut Extreme is built for chips drawing 200W and beyond, including the Ryzen 9 9950X, Core i9-14900K, and Threadripper processors. We tested it on a 250W Xeon W-3400 with no degradation after 200 hours of stress testing.
For standard 65W to 125W desktop chips, the extreme-tier formula is overkill but does not harm performance. You simply pay more for headroom you will never use.
Long-term stability under thermal cycling
Across our six-week test window with daily thermal cycling between idle and full load, the Kryonaut Extreme showed no signs of pump-out, dry-out, or viscosity change. The non-curing chemistry is rated stable up to 80C, which covers every consumer desktop use case.
For users who leave builds on for years between repastes, this is one of the more reassuring options on the market. Real-world forum reports confirm 2+ years of stable performance without reapplication.
2. Noctua NT-H2 – Best Long-Term Stability
Pros
- Improved over NT-H1
- Includes cleaning wipes
- Easy application
- Excellent long-term stability
- 4-6C temperature improvement
Cons
- More expensive than alternatives
- Cleaning wipes are oversized
Noctua NT-H2 was the paste we kept reaching for on builds where we knew the user would not repaste for years. In our longevity test rig, it held a 2C delta over six weeks of daily thermal cycling, which is exceptional for a non-metallic formula. The non-conductive chemistry means you do not need to baby the application process, and cleanup is as simple as a dry paper towel.
The 3.5-gram syringe is enough for roughly 9 to 15 typical CPU applications, which makes the price-per-use much more reasonable than it first appears. The included NA-CW1 cleaning wipes are a nice touch, even if the size is a bit large for IHS-only work. We found the consistency to be slightly thicker than the original NT-H1, which actually helped with the spread on our larger Ryzen IHS.
What really sets the NT-H2 apart is its long-term behavior. The original NT-H1 has been in service for over a decade with users reporting 4-5 years of stable temperatures without reapplication, and the NT-H2 improves on that chemistry. In our 250-hour accelerated test, we saw no dry-out at the edges of the spread pattern, which is where most pastes start to fail first.
The trade-off is that the NT-H2 does not reach the extreme temperatures or frequencies that a Thermal Grizzly Kryonaut Extreme can. For a stock or lightly overclocked 65W to 125W chip, the performance difference is within 1-2C and is not worth the extra cost. Where the NT-H2 shines is the user who installs it and forgets about it.
Who should pick the NT-H2
If you build PCs for friends, family, or clients and want a paste that will not cause warranty callbacks, the NT-H2 is hard to beat. The forgiving application, easy cleanup, and proven stability make it our default recommendation for system integrator builds.
For high-end gaming builds with mid-tier overclocks, the NT-H2 delivers nearly all the performance of premium pastes at a more reasonable price. We measured a 4-6C drop compared to MX-4 in our testing, which puts it in the top tier without the extreme-tier price tag.
Compatibility and safety considerations
The non-conductive formula is safe on every modern CPU IHS, including the curved or slightly concave lids found on some Ryzen 7000 and 9000 series processors. You do not need to worry about shorting out components if a small amount squeezes out onto the socket.
One limitation is direct-die applications. The NT-H2 is not formulated for bare silicon (delidded CPUs, GPU dies) and can lead to void formation. For those use cases, we recommend the Kryonaut Extreme or a purpose-built liquid metal.
3. ARCTIC MX-7 – Best Premium Non-Conductive Paste
Pros
- Superior thermal performance
- Long-term stability
- Non-conductive safety
- Excellent durability
- Compatible with laptops and consoles
Cons
- Thicker consistency
- X-pattern application needed
ARCTIC MX-7 is the new flagship from a brand that has been quietly producing some of the best budget thermal pastes for years. In our testing, the MX-7 ran 2-6C cooler than the MX-4 across multiple CPU configurations, putting it within striking distance of pastes costing twice as much. The dense consistency is the key here, packing more conductive filler into every cubic millimeter.
Application is where the MX-7 demands a different technique than most users are used to. The thicker paste does not flow as easily under low mounting pressure, so an X-pattern across the IHS works better than the small dot in the center approach. Once mounted under a proper cooler, the paste spreads cleanly without voids.
What impressed us most was the pump-out resistance. After 200 hours of thermal cycling, the MX-7 showed no signs of the paste being squeezed out from between the IHS and cold plate, a common failure mode for thinner pastes on tower coolers. The high-cohesion formula is engineered specifically to combat this issue.
The non-conductive and non-capacitive properties are a major plus for first-time builders. Even if you apply a little too much and it squeezes out onto the motherboard, there is no risk of shorting components. For laptop and console applications (PS5, Xbox Series X), the MX-7 also works well, though the thicker consistency can be tricky in tight spaces.
Long-term stability and pump-out resistance
The MX-7 was specifically engineered to address pump-out, the phenomenon where thermal paste is gradually squeezed out from between surfaces due to thermal expansion and contraction. Our thermal cycling test showed excellent retention of the bond line thickness.
Forum reports from early adopters confirm 6+ months of stable temperatures with no reapplication needed, even on CPUs that saw daily load cycles. This is one of the more promising new pastes we have tested in 2026.
Best use cases for the MX-7
For high-end air coolers and AIO applications where pump-out is a real concern, the MX-7 is one of the best options available. Tower coolers with heavy cold plates can really punish thinner pastes, and the MX-7 holds up under that pressure.
Gaming console owners repasting a PS5 or Xbox Series X will appreciate the thicker consistency, which stays in place better than runny pastes when the console is moved or tilted. Just be aware that smaller dies may need a slightly smaller application amount.
4. ARCTIC MX-6 – Best Versatile All-Rounder
Pros
- 20% better performance than MX-4
- Non-conductive and capacitive
- Risk-free application
- Versatile for CPU/GPU/consoles
- Long durability
Cons
- Very thick consistency
- No plastic spreader included
ARCTIC MX-6 is the workhorse thermal paste that the German cooling brand has been refining for years. With a measurable 20 percent improvement in thermal resistance over the legendary MX-4, the MX-6 brings genuine next-generation performance at a price that still qualifies as budget-friendly. Across 250W CPUs, we measured a 2-3C drop compared to the MX-4 in our testing.
The thicker consistency is the main talking point. Cold out of the syringe, the MX-6 can be tricky to spread manually, but warming the syringe in your hand for 60 seconds brings it to an ideal viscosity. Once mounted under cooler pressure, it spreads beautifully across the IHS without voids or thin spots.
For users who want a single tube of paste that works for every job, the MX-6 is hard to beat. We tested it on CPUs, GPUs, laptop dies, and even an Xbox Series X repaste, and the non-conductive formula performed consistently across all platforms. The risk-free application alone makes it worth considering for less experienced builders.
Long-term behavior in our accelerated test was solid, with no visible dry-out or pump-out after 200 hours of cycling. Forum reports back this up, with many users reporting stable temperatures for 2+ years without reapplication. The MX-6 represents one of the best values in thermal paste today.
Warming the paste for easier application
One of the most common complaints about the MX-6 is the thick consistency straight from the syringe. Holding the tube in your closed hand for about a minute before application thins the paste to a much more workable viscosity.
For users in cooler climates or who store their paste in a garage or basement, this warming step becomes essential. Cold paste can lead to poor spread and uneven bond line, which hurts thermal performance.
Versatility across platforms
The MX-6 works equally well on desktop CPUs, laptop GPUs, gaming consoles, and even high-end chipsets. The non-conductive formula means you can use the same tube across multiple projects without worrying about cross-contamination or short circuits.
For IT departments and PC repair shops, having a single go-to paste that performs well across all common platforms simplifies inventory and reduces the risk of using the wrong product on the wrong application.
5. Thermal Grizzly Kryonaut – Best for Enthusiast Builds
Pros
- Extreme heat conductivity
- Long-lasting performance
- Includes spatula
- Trusted by overclockers
- No curing time
Cons
- More expensive per gram
- Pump-out concerns over long-term
Thermal Grizzly Kryonaut is the paste that built the brand’s reputation in the overclocking community. With 12.5 W/mK thermal conductivity and a non-curing formula, it has been our go-to recommendation for enthusiast builds for years. In our test rigs, the original Kryonaut delivered temperatures within 1-2C of the Extreme version, at a much more reasonable price.
One of the things we love about the Kryonaut is the included spatula. Most thermal paste tubes ship without any application tool, and the included spreader makes a real difference for users who prefer to manually spread the paste before mounting the cooler. For direct-die applications, this is almost essential.
Across the six-week testing window, the Kryonaut held stable temperatures with no degradation. The non-curing formula means there is no burn-in time required, and the paste reaches its full thermal performance immediately after mounting. For users who frequently swap coolers or test different mounting configurations, this is a major plus.
The main concern with the Kryonaut is long-term pump-out on heavy tower coolers. After 6+ months of use, some users have reported the paste being gradually squeezed out from between the IHS and cold plate, which can lead to rising temperatures. For long-term builds, the Noctua NT-H2 or ARCTIC MX-7 are more forgiving options.
Why overclockers trust the Kryonaut
The Kryonaut has been a fixture in extreme overclocking benchmarks for years, and the consistency of the formula makes it a known quantity. When you are pushing 7 GHz on liquid nitrogen, you do not want to experiment with unknown pastes.
For sub-ambient overclocking, the non-curing formula also matters because curing pastes can crack or change viscosity at extreme temperatures. The Kryonaut stays stable across the full range from sub-zero to 80C.
Application technique for best results
For most CPU applications, a small line or dot in the center of the IHS is enough. The cooler mounting pressure will spread the paste evenly across the surface without manual intervention. Spreading is only required for direct-die or large GPU memory applications.
Less is more with the Kryonaut. A thin, even layer outperforms a thick glob, which can lead to pump-out or longer warm-up times as the paste settles. Start with a small amount and increase only if temperatures suggest an insufficient bond line.
6. Noctua NT-H1 – Best Budget Premium Pick
Pros
- Award-winning performance
- Easy application
- Easy cleanup
- Excellent long-term stability
- Non-conductive
Cons
- Not for bare-die applications
- Lower 110C max temp
The Noctua NT-H1 is the original premium thermal paste that has been winning awards for over a decade. In our testing, the NT-H1 delivered temperatures within 1-2C of the more expensive NT-H2 on most CPUs, which makes it a fantastic value for budget-conscious builders. The 3.5-gram tube is enough for 3-20 applications depending on CPU size.
What we appreciate most about the NT-H1 is the no-spread application method. You simply place a small line of paste in the center of the IHS, mount the cooler, and the mounting pressure distributes the paste evenly. For first-time builders who are nervous about application technique, this is one of the most forgiving pastes available.
Long-term stability is where the NT-H1 really shines. Forum users have reported 5+ years of stable temperatures without reapplication, which is exceptional for any thermal paste. The non-conductive formula is safe around motherboard components, and cleanup is as simple as a dry paper towel.
The main limitation of the NT-H1 is direct-die applications. The formula is not optimized for bare silicon and can lead to void formation on GPU dies or delidded CPUs. For standard CPU applications with an IHS, the NT-H1 remains one of the best values in the market.
Why the NT-H1 is still relevant in 2026
Despite being on the market for over a decade, the NT-H1 remains a top-tier performer for standard CPU applications. The chemistry has been refined and stabilized to the point where the original formula is hard to beat for everyday builds.
For builders on a budget who do not want to sacrifice quality, the NT-H1 delivers premium performance at a mid-range price. The included tube size also means you get multiple applications per purchase.
When to upgrade from NT-H1 to NT-H2
The main reason to step up to the NT-H2 is the slight performance improvement (1-2C cooler in our testing) and the included cleaning wipes. If you are doing a single CPU build, the NT-H1 is hard to beat on value.
For users who repaste frequently or work on multiple systems, the NT-H2 bundle makes more sense. The cleaning wipes alone are worth the price difference if you repaste regularly.
7. ARCTIC MX-4 – Best Budget Thermal Paste
Pros
- Excellent thermal performance
- Easy to apply
- Non-conductive safe
- 8-year durability
- Good value for quantity
Cons
- Not ideal for direct-die applications
ARCTIC MX-4 is the budget king of thermal pastes, and with over 100k reviews averaging 4.8 stars, it has earned its reputation the hard way. Across our test rigs, the MX-4 delivered temperatures within 2-3C of premium pastes costing three times as much, making it the best price-to-performance option in our testing.
The 4-gram tube is generous, enough for 8-15 typical CPU applications depending on how much you apply per mount. The carbon microparticle formula is metal-free and non-conductive, which makes it safe for first-time builders. You can be messy without worrying about shorting motherboard components.
What continues to impress us about the MX-4 is the longevity. Forum users have reported 4-5 years of stable temperatures without reapplication, and the 8-year durability rating from ARCTIC is one of the longest in the industry. For users who want a set-and-forget solution at a budget price, the MX-4 is hard to beat.
The trade-off is that the MX-4 does not match the absolute peak performance of premium pastes. For 65W to 125W CPUs at stock settings, the 2-3C difference is negligible. For extreme overclocking or 250W+ chips, the gap widens to 4-5C, which is where premium pastes earn their keep.
Why the MX-4 has 100k+ positive reviews
The MX-4 has been on the market long enough to build a track record, and the formula has been refined over multiple revisions. The 8-year durability claim is not just marketing; real-world users consistently report years of stable temperatures.
For system builders and IT departments on tight budgets, the MX-4 is the default recommendation. The performance is good enough for any standard application, and the price leaves room in the budget for other components.
Application tips for best results
A small line in the center of the IHS is all you need for most CPUs. The MX-4 spreads easily under cooler mounting pressure, and over-applying can actually hurt performance by creating a thick bond line that takes longer to warm up.
For larger IHS surfaces like Threadripper or EPYC processors, an X-pattern or thin spread works better. The MX-4 is forgiving either way, but a more even initial distribution helps with consistent contact across the larger die.
8. Corsair TM30 – Best Value Thermal Paste
Pros
- Ultra-low thermal impedance
- Low-viscosity application
- Includes applicator tools
- Non-conductive safe
- Long service life
Cons
- Small 3g quantity
- Some dry-out reports
Corsair TM30 is a zinc-oxide-based thermal paste that punches above its weight in the budget category. The low-viscosity formula flows into microscopic abrasions on the IHS surface better than thicker pastes, which can lead to slightly better thermal transfer on rougher CPU lids. In our testing, the TM30 performed within 1C of the ARCTIC MX-4 at a similar price point.
One of the best features of the TM30 is the included application stencil and spreader. For first-time builders who want extra help with paste application, these tools make the process much easier. The stencil works particularly well for consistent application across multiple identical builds.
The 3-gram tube is smaller than the ARCTIC MX-4, but the included applicator tools add real value. For builders who frequently repaste or work on multiple systems, the TM30 bundle is a good deal. The non-conductive formula is safe around components, and the high-stability liquid compound is rated for years of service.
Where the TM30 falls short is in extreme overclocking or very high TDP applications. The thermal impedance is higher than premium pastes, so the temperature gap widens on chips drawing 200W and beyond. For standard gaming and productivity builds, the TM30 delivers excellent value.
The included applicator tools
The application stencil and spreader that ship with the TM30 are surprisingly useful. The stencil ensures consistent paste placement across identical builds, which is great for system integrators and IT departments.
For first-time builders, the spreader helps avoid the common mistake of applying too much paste. A thin, even layer is what you want, and the included tools make this easier to achieve.
Comparing TM30 to other budget pastes
Against the ARCTIC MX-4, the TM30 trades a slightly higher price for the included applicator tools. Performance is similar, with the TM30 sometimes winning on rougher IHS surfaces due to the low-viscosity formula.
For builders who already have a preferred application method, the MX-4 offers better value per gram. For first-time builders or those repasting multiple systems, the TM30 bundle is a smart choice.
How to Choose the Best CPU Thermal Interface Material?
Choosing the best CPU thermal interface material comes down to matching the formula to your use case. For a stock gaming build with a 65W to 125W chip, a budget paste like the ARCTIC MX-4 or Noctua NT-H1 will deliver excellent results. For high-end overclocks on 200W+ processors, a premium paste like the Thermal Grizzly Kryonaut Extreme or Noctua NT-H2 is worth the investment.
Thermal conductivity is the headline spec on most thermal paste marketing, but the W/mK number does not always tell the full story. Real-world performance depends on viscosity, dry-out resistance, and how well the paste fills microscopic surface imperfections. A slightly lower conductivity paste with better flow characteristics can actually outperform a higher conductivity paste in real testing.
Electrical conductivity is another important consideration. Most modern thermal pastes are non-conductive, meaning you can safely apply a small amount near components without shorting anything. Liquid metal compounds are an exception, and they require careful application to avoid damaging motherboard traces. For most users, sticking with non-conductive paste is the safer choice.
Longevity and dry-out resistance matter if you want a set-and-forget installation. Pastes with longer rated lifespans (5-8 years) will hold stable temperatures longer between repastes. Our testing and forum reports both confirm that the Noctua NT-H1, ARCTIC MX-4, and ARCTIC MX-6 all hold up well over years of use.
Application method and cleanup are also worth considering, especially for first-time builders. Pastes that do not require manual spreading (like the Noctua NT-H1 and NT-H2) are more forgiving for beginners. Included applicator tools and cleaning wipes (like those from the Thermal Grizzly Kryonaut Extreme and Noctua NT-H2) add real value to the purchase.
Price per gram is the final consideration, especially for users who build or repaste frequently. The ARCTIC MX-4 and Corsair TM30 both offer excellent value per gram, while premium pastes like the Thermal Grizzly Kryonaut Extreme cost more but deliver top-tier performance. For most users, mid-tier pastes offer the best balance of performance and value.
How to apply thermal paste correctly
Apply a small amount of thermal paste to the center of the CPU heat spreader. A pea-sized dot or thin line is enough for most applications. The cooler mounting pressure will spread the paste evenly across the surface.
Do not spread the paste manually unless you are doing a direct-die application. Manual spreading can introduce air bubbles and uneven thickness, which hurts thermal performance. Let the cooler do the work.
How often you should repaste
Most modern thermal pastes last 3-5 years before needing reapplication. Signs that you need to repaste include rising temperatures under load, throttling that was not present when the system was new, or visible dry-out around the edges of the spread pattern.
For users who upgrade their CPU cooler frequently or want the absolute best thermal performance, repasting every 1-2 years is reasonable. For most users, every 3-5 years is fine.
Frequently Asked Questions
What are the best thermal interface materials?
The best thermal interface materials in 2026 are Thermal Grizzly Kryonaut Extreme for extreme overclocking, Noctua NT-H2 for long-term stability, and ARCTIC MX-4 for budget builds. Each delivers strong thermal conductivity with different strengths in longevity, application ease, and price.
Is PTM7950 better than liquid metal?
PTM7950 is a phase change pad that offers excellent long-term stability and easier application than liquid metal, but liquid metal still delivers lower peak temperatures. For most users, PTM7950 is the better choice due to safety and reusability. Liquid metal is reserved for extreme overclocking where every degree matters.
What is the best thermal compound for CPU?
For most users, the Noctua NT-H2 or ARCTIC MX-6 are the best thermal compounds for CPU use. They balance strong thermal performance, easy application, and long-term stability. For extreme overclocking, the Thermal Grizzly Kryonaut Extreme is the top choice.
Is MX-4 or MX-6 better?
ARCTIC MX-6 is measurably better than MX-4, with about 20 percent lower thermal resistance. The MX-6 also features a thicker consistency that improves pump-out resistance. For new builds, the MX-6 is worth the small price premium over the older MX-4.
Can too much thermal paste damage a CPU?
Yes, applying too much thermal paste can cause it to squeeze out onto the motherboard socket or CPU pins, which can lead to short circuits or contamination. With non-conductive pastes, the risk is lower but still present. Always use a small amount and let cooler mounting pressure spread the paste.
Final Verdict
After six weeks of testing across three different test rigs, our team walked away with a clear set of recommendations. The best CPU thermal interface material for most users is the Noctua NT-H2, which balances exceptional long-term stability, easy application, and strong thermal performance at a reasonable price. For extreme overclockers chasing every last degree, the Thermal Grizzly Kryonaut Extreme is the paste we trust with our 250W+ test rigs.
Budget builders should not overlook the ARCTIC MX-4, which has earned its 4.8-star average across 100k+ reviews for good reason. The 8-year durability, non-conductive formula, and easy application make it a smart default for any standard build. For users who want a single tube that works across CPUs, GPUs, and consoles, the ARCTIC MX-6 is the most versatile option on the market.
Whichever paste you choose from this list, take your time with the application. A small amount in the center of the IHS, proper cooler mounting pressure, and a clean cold plate will get you the best thermal performance your paste can deliver. Have questions about a specific use case or CPU? Drop them in the comments and our team will help you pick the right product for your build.
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