The best thermal paste for most builders in 2026 is ARCTIC MX-6: it lands within a degree or two of pastes costing three times more, spreads easily, and is non-conductive, so a sloppy first application will not short anything out. If maximum heat transfer is the goal, Thermal Grizzly Kryonaut Extreme leads this lineup on raw conductivity and earns its premium under overclocked CPUs and GPUs. For first-time builders, Noctua NT-H2 stands out for its forgiving consistency and bundled cleaning wipes. The real tradeoff in this category is not good versus bad — nearly every paste here performs well — but peak performance versus price per application, plus how long the paste holds up before it needs replacing. I ranked 15 options from ARCTIC, Thermal Grizzly, and Noctua on exactly those factors, so read on for the full breakdown of which paste fits your build and your budget.
Key Takeaways
- ARCTIC MX-6 edged out pricier compounds in this lineup because its thermal performance sits within a couple of degrees of Thermal Grizzly’s best at roughly a third of the cost per gram — peak conductivity numbers mattered less than expected outside of overclocking.
- The Kryonaut family splits cleanly by use case: standard Kryonaut suits high-end gaming builds, while Kryonaut Extreme’s higher conductivity only pays off under sustained overclocks, delidded chips, or heat-soaked small-form-factor cases.
- All 15 pastes in this roundup are non-conductive ceramic or carbon formulas — no liquid metal — which makes application mistakes survivable, a real safety margin for beginners working around exposed GPU dies and laptop boards.
- Bundle versions with MX Cleaner or Noctua‘s NA-CW1 wipes justify their small premium on a first build, because removing old or excess paste properly affects temperatures as much as the fresh compound itself.
- Buying size changes the math completely: the 45 g MX-4 tub drops the cost per application below a dollar, while 1 g Kryonaut syringes only make sense if you repaste a single high-end machine every couple of years.
| thermal paste | Brand |
|---|---|
| ARCTIC MX-6 Thermal Paste | ARCTIC |
| Thermal Grizzly Kryonaut 1 Gra | — |
| Thermal Grizzly Kryonaut 1 Gra | — |
| Thermal Grizzly Kryonaut Extre | — |
| ARCTIC MX-6 Thermal Paste | ARCTIC |
| ARCTIC MX-7 Thermal Paste | ARCTIC |
| ARCTIC MX-7 Thermal Paste | ARCTIC |
| ARCTIC MX-4 Thermal Paste | ARCTIC |
| Thermal Grizzly Duronaut Therm | Thermal Grizzly |
| ARCTIC MX-6 Thermal Paste | ARCTIC |
| ARCTIC MX-7 Thermal Paste | ARCTIC |
| ARCTIC MX-4 | ARCTIC |
| ARCTIC MX-4 Thermal Paste | ARCTIC |
| Noctua NT-H2 3.5g Thermal Comp | Noctua |
| Thermal Grizzly Kryonaut Extre | Thermal Grizzly |
More Details on Our Top Picks
ARCTIC MX-6 Thermal Paste (8 g)
ARCTIC MX-6 earns the top spot because it balances performance, safety, and quantity better than anything else here. The 8-gram syringe covers a dozen or more CPU mounts, where the Thermal Grizzly Kryonaut’s single gram barely stretches past one or two builds. MX-6 is also electrically non-conductive, so a sloppy spread won’t short a motherboard — a real risk margin that careless over-application of pricier pastes doesn’t forgive. Compared with the older ARCTIC MX-4 in this roundup, MX-6 runs with lower thermal resistance, which translates to a few degrees shaved off load temperatures on modern CPUs and GPUs. The tradeoff: casual users won’t feel the difference over a budget paste, and the thicker consistency rewards careful, patient application rather than speed. For the price-to-performance math on most builds, this is the tube I’d buy first.
Pros:- 8 g tube covers 10+ CPU applications, far more than 1 g competitors
- Non-conductive formula eliminates short-circuit risk from over-application
- Lower thermal resistance than MX-4 for measurably cooler load temps
- Works across CPUs, GPUs, laptops, and consoles
Cons:- Thicker viscosity demands a careful, even spread
- Gains over budget pastes are small on stock-clocked hardware
- No cleaning wipes included despite the multi-use tube
Best for: PC builders and upgraders who repaste multiple CPUs, GPUs, or consoles and want one tube that covers everything safely
Not ideal for: Extreme overclockers chasing benchmark records — Kryonaut Extreme pulls lower temperatures under heavily tuned loads
- Brand:ARCTIC
- Volume:8 g
- Weight:0.282 oz
- Thermal Conductivity:Very high
- Electrical Conductivity:Non-conductive
- Compatible Devices:CPU, GPU, laptops, consoles
- Durability:Long-lasting
Our verdict“The paste I’d hand to almost anyone — enough quantity for years of builds, safe chemistry, and performance close to the premium picks.”
Thermal Grizzly Kryonaut 1 Gram High-Performance Thermal Paste
When raw thermal transfer is the priority, Thermal Grizzly Kryonaut is the name every other paste in this roundup gets measured against. Its extreme heat conductivity is aimed squarely at overclocked CPUs and GPUs that dump serious wattage through the heatspreader, and it won’t dry out at sustained 80°C, so performance stays put for years rather than months. Compared with ARCTIC MX-6, Kryonaut costs considerably more per gram and ships in a 1-gram syringe — enough for one, maybe two careful mounts. That makes it a scalpel, not a multipurpose tool: I’d reach for it when squeezing the last few degrees out of a tuned system, and skip it for routine console or laptop maintenance where its premium goes unnoticed. A spatula comes in the box, which helps stretch the tiny supply.
Pros:- Class-leading thermal conductivity for heavily overclocked chips
- Stays stable without drying out at sustained 80°C
- Included syringe and spatula make precise application easy
- Proven long-term performance under heavy thermal loads
Cons:- 1 g size covers only one or two mounts
- High price per gram next to MX-6 or MX-4
- Overkill for stock-clocked or lightly used systems
Best for: Enthusiasts overclocking a CPU or GPU who want the lowest possible temperatures from an air or AIO cooler
Not ideal for: Anyone repasting several machines — the single gram runs out fast, and MX-6’s 8 g tube is far cheaper per application
- Volume:1 g
- Thermal Conductivity:Extreme heat conductivity
- Application Method:Syringe with included spatula
- Temperature Stability:Does not dry out at 80°C
- Intended Use:Overclocked CPUs and GPUs
- Longevity:Long-lasting
Our verdict“The right splurge for a single overclocked build where every degree counts — wasteful anywhere else.”
Thermal Grizzly Kryonaut 1 Gram with Cleaning Wipes
This bundle takes the same Thermal Grizzly Kryonaut formula as the standalone 1-gram syringe and pairs it with six wet and six dry cleaning wipes, which solves the least glamorous part of repasting: stripping old, crusted compound off a heatspreader. For someone opening a laptop or GPU for the first time, that prep matters more than the paste itself — residue left behind creates air gaps that no premium formula can overcome. Against the plain Kryonaut listing in this roundup, the only real difference is the wipes and a slightly higher price, so returning builders who already own isopropyl alcohol are paying for convenience they don’t need. Compared with ARCTIC MX-6’s 4 g cleaner bundle, there’s less paste here but a stronger formula. I’d point nervous first-timers here; veterans should buy the bare syringe.
Pros:- Includes 12 wipes (6 wet, 6 dry) for proper surface prep
- Same extreme-conductivity Kryonaut formula as the standalone syringe
- Wet/dry wipe pairing removes old compound without extra supplies
- Strong 4.7/5 customer rating
Cons:- Still only 1 g of paste for the money
- Premium over the wipe-free Kryonaut listing
- Small supply demands careful handling to avoid waste
Best for: First-time repasters who want paste and surface-prep wipes in one box, with no separate alcohol run
Not ideal for: Experienced builders with cleaning supplies on hand — the plain 1 g Kryonaut costs less for identical paste
- Paste Volume:1 g
- Included Wipes:12 (6 wet, 6 dry)
- Thermal Conductivity:Extreme
- Customer Rating:4.7/5
- Best Sellers Rank:#7 in Silicon Grease
- Dimensions:3.94 x 0.79 x 0.79 in
- Item Weight:3.53 oz
- Model Number:K-001 with Wipes
Our verdict“The easiest way for a first-timer to get overclocking-grade paste and everything needed to prep the surface in one purchase.”
Thermal Grizzly Kryonaut Extreme 2 Gram
Kryonaut Extreme sits above standard Kryonaut in Thermal Grizzly’s lineup, and the 2-gram size here finally fixes the range’s biggest annoyance — running dry mid-project. Thermal Grizzly rates the syringe for up to 12 CPU applications, so an enthusiast can service a whole bench of systems. The formula targets demanding overclocking with immediate temperature drops, and it holds stability at up to 80°C without drying. Set against ARCTIC MX-6, the price per gram is steep, and on a stock-clocked gaming rig the difference shrinks to a degree or two you’d never notice. Even versus regular Kryonaut, the gains show up mainly at the ragged edge of tuning. This pick makes the most sense for competitive overclockers and anyone chasing benchmark leaderboards — not for a routine laptop repaste.
Pros:- Step up in heat transfer over standard Kryonaut
- 2 g covers up to 12 CPU mounts
- Stable at up to 80°C without drying out
- Immediate temperature and noise reduction under load
Cons:- Highest price per gram in this roundup
- Benefits fade on stock or mildly tuned hardware
- No cleaning wipes in this listing, unlike the Extreme wipes bundle
Best for: Competitive overclockers and benchmark chasers running heavily tuned CPUs, GPUs, or consoles at the edge of stability
Not ideal for: Mainstream builders — MX-6 delivers nearly the same result at a fraction of the price per gram
- Volume:2 g
- Coverage:Up to 12 CPU applications
- Thermal Conductivity:Exceptional
- Temperature Stability:Up to 80°C
- Application Method:Syringe with included applicator
- Compatible Devices:CPU, GPU, PS4, PS5, Xbox
Our verdict“The premium choice when maximum heat transfer justifies the cost — everyone else should buy MX-6.”
ARCTIC MX-6 Thermal Paste (4 g, includes 6 MX Cleaner)
Half the size of the 8-gram MX-6 but bundled with six MX Cleaner sachets, this kit is built for the person repasting one or two machines properly rather than stocking a workbench. The paste itself is identical to my Best Overall pick: non-conductive, long-lasting, and a clear step up from the older ARCTIC MX-4 formula still floating around this roundup. Against the Kryonaut wipes bundle, you trade peak conductivity for four times the paste volume, which is the smarter swap for laptops and consoles that never see an overclock. The 4-gram supply still handles six to eight desktop mounts, though heavy users will burn through it faster than the 8 g tube. For a single careful repaste with proper prep included, this is the most economical complete kit here.
Pros:- Includes 6 MX Cleaner sachets for surface prep
- Same safe, non-conductive MX-6 formula as the 8 g tube
- 4 g covers roughly six to eight CPU mounts
- Cheaper entry point than any Kryonaut option
Cons:- Costs more per gram than the 8 g MX-6
- Can’t match Kryonaut-class conductivity on overclocked chips
- Cleaner sachets are single-use, unlike a bottle of isopropyl alcohol
Best for: Budget-minded upgraders repasting one or two PCs or consoles who want cleaning supplies included without paying Kryonaut prices
Not ideal for: Serial builders — the 8 g MX-6 tube costs less per gram and lasts far longer
- Brand:ARCTIC
- Volume:4 g
- Included Extras:6 MX Cleaner sachets
- Type:Thermal paste
- Electrical Conductivity:Non-conductive
- Compatible Devices:CPU, GPU, laptop, console
- Durability:Long-lasting
Our verdict“The best-value complete kit for one careful repaste — buy the bigger tube if you’ll use it more than twice.”
ARCTIC MX-7 Thermal Paste (4 g, includes MX-Cleaner)
The ARCTIC MX-7 earns the top slot because it pairs flagship-level heat transfer with the one thing most rivals skip: a bundled MX-Cleaner for surface prep. Compared with the Thermal Grizzly Duronaut, it trades a small amount of peak conductivity for a non-conductive formula that’s far more forgiving if a dab slips onto the motherboard — a margin of safety I’d want on any expensive build. The paste itself is dense and viscous, designed to spread under mounting pressure rather than by hand, which helps it resist pump-out over years of thermal cycles. The tradeoff is technique: beginners used to smearing MX-4 with a spatula will find this paste fights manual spreading. For a single high-end build done right, though, this kit covers everything in one box.
Pros:- Includes MX-Cleaner, so old compound removal needs no extra purchase
- Flagship-tier heat transfer competitive with premium pastes
- Non-conductive formula stays safe if it contacts components
- Strong resistance to pump-out and dry-out over long service intervals
Cons:- Cannot be spread manually — relies entirely on even mounting pressure
- Only 4 g per kit, so multi-build projects need a second syringe
- Thick texture is less forgiving for inexperienced applicators than MX-4
Best for: Builders assembling one high-end PC who want surface prep and paste in a single purchase
Not ideal for: First-timers who want to spread paste by hand — the dense consistency only works under mounting pressure
- Brand:ARCTIC
- Net Weight:4 g
- Included Accessory:MX-Cleaner for surface preparation
- Consistency:Dense, highly viscous
- Application Method:Pressure-spread; no manual spreading
- Electrical Conductivity:Non-conductive
- Rated For:CPUs, GPUs, and other electronic devices
- Longevity Focus:Resists pump-out and dry-out
Our verdict“The most complete single-build package here: top-tier paste plus the cleaner to apply it properly.”
ARCTIC MX-7 Thermal Paste (4 g) – High Performance, Long Durability
This is the same MX-7 compound as the bundle above, minus the MX-Cleaner — and that single difference defines its role. If a workspace already has isopropyl alcohol and lint-free cloths, the plain 4 g syringe delivers identical pump-out and dry-out resistance for less money, making it the smarter pick for a build meant to stay sealed for five-plus years. Against the ARCTIC MX-6, it costs more per gram but holds its performance longer under repeated heat cycles, so I’d favor it for small-form-factor PCs where repasting is a chore. The catch is the self-distributing consistency: it refuses manual spreading, so sloppy mounting pressure shows up as uneven coverage. Builders who like full control over the spread may prefer the more cooperative MX-6.
Pros:- Same flagship compound as the MX-7 kit at a lower entry price
- Formulated specifically to resist pump-out and dry-out over years
- Non-conductive and non-capacitive, so application mistakes stay safe
- Cleans up easily with compatible MX Cleaner
Cons:- Self-distributing formula demands careful, even mounting pressure
- No cleaner included, unlike the sibling bundle
- Priced higher per gram than the MX-6 for similar single-build results
Best for: SFF and ITX builders who want a set-and-forget paste they won’t need to revisit for years
Not ideal for: Anyone without cleaning supplies on hand — the MX-7 bundle with MX-Cleaner is the better buy
- Brand:ARCTIC
- Volume:4 g
- Thermal Conductivity:High, flagship-tier
- Application Method:Self-distributing under mounting pressure
- Electrical Safety:Non-conductive, non-capacitive
- Durability:Resists pump-out and dry-out
- Cleanup:Compatible with ARCTIC MX Cleaner
- Best Use:Long service intervals on CPUs and GPUs
Our verdict“Buy this version of MX-7 when longevity matters most and surface prep is already covered.”
ARCTIC MX-4 Thermal Paste (45 g) – High Performance CPU and GPU Cooler Compound
Where the rest of this list sells performance by the gram, the ARCTIC MX-4 45 g sells volume — roughly eleven times the content of a standard 4 g MX-6 syringe. For repair benches, IT departments, or hobbyists repasting a fleet of older GPUs, that math beats every other option here. The carbon-based, metal-free formula spreads easily by hand, which also makes it the most forgiving paste in the roundup for first-timers. The compromise is ceiling: MX-4 is an older recipe, and both the MX-7 and Thermal Grizzly Duronaut pull ahead on high-wattage chips. It’s also a big, clumsy syringe for tiny laptop dies, and there’s no applicator in the box. I’d call it the workshop staple, not the record-setter.
Pros:- Massive 45 g supply delivers the lowest cost per application in the roundup
- Spreads manually with ease, friendly to beginners
- Metal-free and non-conductive, so stray paste causes no shorts
- Long track record with consistently high customer ratings
Cons:- Older formula trails MX-7 and Duronaut on high-wattage chips
- No applicator or spreader included despite the bulk format
- Oversize syringe is awkward for small laptop and console dies
Best for: Repair shops, IT departments, and hobbyists who repaste dozens of machines a year
Not ideal for: Single-build buyers — 45 g will expire in the drawer long before it’s used up
- Brand:ARCTIC
- Net Content:45 g
- Item Weight:1.59 oz
- Dimensions:4.72 x 4.72 x 0.79 in
- Composition:Carbon microparticles, metal-free
- Electrical Conductivity:Non-conductive
- Skill Level:Beginner-friendly manual application
- Model Number:ACTCP00024A
- Extras:No applicator or spreader included
Our verdict“The right choice when quantity and cost per job matter more than squeezing out the last degree.”
Thermal Grizzly Duronaut Thermal Paste, 6g
The Thermal Grizzly Duronaut is the connoisseur’s pick, and it prices itself accordingly. Its aluminum microparticle and zinc oxide blend is engineered for extremely thin bond lines — thinner layers mean less thermal resistance, which is where its conductivity advantage over the ARCTIC MX-7 actually comes from. On a delidded CPU, a high-end GPU die, or any build chasing the last few degrees, that difference is measurable. Compared with Thermal Grizzly’s own Kryonaut, Duronaut prioritizes long-term stability over the absolute lowest temperatures. The tradeoffs are real: it’s the most demanding paste here to apply, rewarding experienced hands and punishing excess, and the 6 g tube costs more than most budget pastes per application. For a stock-clocked office PC, it’s money spent on nothing.
Pros:- Top-tier thermal conductivity aimed at high-heat chips
- Engineered for very thin application layers, reducing thermal resistance
- Long-term stability focus suits extended overclocking sessions
- Generous 6 g quantity covers several applications
Cons:- Premium price per gram over ARCTIC alternatives
- Demanding application — excess paste hurts rather than helps
- Performance headroom goes unused on stock or mid-range builds
Best for: Overclockers and enthusiasts running high-wattage CPUs or GPUs who want premium paste that lasts
Not ideal for: Casual builders on stock clocks — the MX-6 delivers nearly the same real-world result for less
- Brand:Thermal Grizzly
- Net Content:6 g
- Composition:Silicone oil with aluminum microparticles and zinc oxide nanoparticles
- Layer Thickness:Supports very thin application layers
- Rated For:CPU, GPU, and gaming consoles
- Stability:Long-term durability focus
- Target User:Advanced builders and overclockers
Our verdict“Worth the premium only if the build actually pushes enough heat to exploit it.”
ARCTIC MX-6 Thermal Paste – 4g, High Performance CPU, GPU, and Console Cooling Compound
The ARCTIC MX-6 hits the sweet spot of this roundup: meaningfully newer and better-conducting than the budget MX-4, yet priced well below the MX-7 and Duronaut. It’s non-conductive, easy to spread, and rated for consoles as well as CPUs and GPUs, which makes it the paste I’d hand to someone repasting a PS5 or a mid-range gaming rig on a Saturday afternoon. Against the MX-7, it gives up some long-term pump-out resistance, so builds meant to run untouched for years are better served by the newer flagship. And at just 4 g, heavy users will burn through it faster than they’d like — the 45 g MX-4 is the better buy for bulk work. For one or two builds, though, performance per dollar doesn’t get much better.
Pros:- Best performance-per-dollar ratio in this lineup
- Simple, forgiving application suited to occasional builders
- Non-conductive and safe around exposed components
- Rated for CPUs, GPUs, and consoles alike
Cons:- Gives up some long-term pump-out resistance versus the MX-7
- 4 g size runs out quickly across multiple builds
- No cleaning wipes or applicator bundled in
Best for: Console owners and mid-range PC builders who want modern paste performance on a budget
Not ideal for: High-volume users — the small 4 g tube makes the 45 g MX-4 cheaper per job
- Brand:ARCTIC
- Net Content:4 g
- Model Number:MX-6 (ACTCP00080A)
- UPC:840033401739
- Electrical Safety:Non-conductive
- Rated For:CPUs, GPUs, and consoles
- Application:Easy spread, beginner-friendly
- Unit Count:1 syringe
Our verdict“The default recommendation for most single builds that don’t need flagship endurance.”
ARCTIC MX-7 Thermal Paste (8 g)
My top pick for most builders is the ARCTIC MX-7, because it pairs high filler content — the part of a paste that actually moves heat — with resistance to pump-out and dry-out, the two failure modes that slowly raise your temps a year after application. Compared with the older ARCTIC MX-4, it targets higher sustained loads, so it makes more sense for modern hot-running CPUs and GPUs. Against the Thermal Grizzly Kryonaut Extreme, it gives up a little peak conductivity but comes in an 8 g tube instead of 2 g, which changes the cost-per-build math completely. The tradeoff: the viscosity is tuned for pressure application, so you cannot spread it manually — you apply a dot or line and let the cooler do the work. It’s also a newer formula, so its long-term record is shorter than MX-4’s.
Pros:- High filler content delivers strong heat transfer under sustained load
- Formulated to resist pump-out and dry-out, so performance holds up over time
- Non-conductive formula removes short-circuit risk if application is messy
- Generous 8 g tube covers many repastes across desktops, laptops, and consoles
Cons:- Cannot be spread manually, so application technique matters more than with spreadable pastes
- Newer formula with less long-term user history than the MX-4 line
Best for: PC builders and upgraders who want one tube that covers several CPU, GPU, and console repastes over years
Not ideal for: Extreme overclockers chasing every last degree — the Kryonaut Extreme is the better tool for that niche
- Brand:ARCTIC
- Net Content:8 g
- Cooling Method:Thermal conduction
- Compatible Devices:Desktop, laptop, graphics cards, gaming consoles
- Electrical Conductivity:Non-conductive
- Application Style:Pressure-applied, no manual spreading
- Package Dimensions:1 x 0.6 x 4.2 inches
Our verdict“If you want one paste that handles nearly every build well for years, this is the tube I’d buy.”
ARCTIC MX-4 (4 g) Thermal Paste for CPUs and GPUs
The ARCTIC MX-4 is the paste I’d hand to anyone who wants proven performance without paying for the newest formula. Its 8-year rated lifespan is the longest claim in this lineup — longer than the Noctua NT-H2’s 5 years of use — and it’s metal-free and non-conductive, so a sloppy first application won’t short anything. Compared with the ARCTIC MX-7, it gives up some headroom under heavy, sustained loads, but for stock or mildly overclocked systems the real-world gap is small enough that the lower price usually wins. The honest drawback is the 4 g tube: it’s fine for several CPU mounts, but anyone maintaining multiple machines will burn through it and end up buying again. For single-build buyers, though, that barely matters.
Pros:- Up to 8 years of rated durability, the longest claim in this roundup
- Non-conductive and metal-free, so it’s forgiving of beginner mistakes
- Easy, forgiving consistency that suits first-time applicators
- Typically the cheapest per purchase in the ARCTIC lineup
Cons:- 4 g tube runs out quickly if you repaste multiple CPUs or GPUs
- Older formula trails the MX-7 under heavy sustained thermal loads
Best for: Budget-conscious builders doing one or two builds who value a long, proven track record over peak specs
Not ideal for: High-load overclocking rigs or anyone repasting several machines — buy the bigger MX-7 tube instead
- Brand:ARCTIC
- Net Content:4 g
- Product Type:Thermal paste
- Intended Application:CPU and GPU
- Electrical Conductivity:Non-conductive, metal-free
- Rated Lifespan:Up to 8 years
- Skill Level:Beginner-friendly
Our verdict“The sensible default for a typical build where proven reliability matters more than squeezing out the last degree.”
ARCTIC MX-4 Thermal Paste (4 g) with Spatula
This is the same MX-4 formula as the standard 4 g tube — same carbon microparticle base, same metal-free safety margin — but it ships with a spatula for manual spreading, which is why I’d point first-time builders here instead. Spreading an even thin layer before mounting the cooler removes the guesswork about whether pressure alone covered the whole heat spreader, and that peace of mind is worth a small premium when it’s your first repaste. Compared with the plain MX-4 listing, you’re paying a little extra for a piece of plastic experienced builders will never touch. And compared with the ARCTIC MX-7, which can’t be spread by hand at all, this is simply the more forgiving paste to learn on. The 4 g capacity and mid-tier peak performance carry the same limits as its sibling.
Pros:- Included spatula lets beginners verify even coverage before mounting
- Same proven carbon-based, non-conductive formula as the standard MX-4
- Metal-free composition eliminates short-circuit risk during learning mistakes
- Forgiving consistency that’s easy to work with
Cons:- Costs more than the identical paste without the spatula
- 4 g capacity limits how many repastes you get per purchase
- Manual spreading can trap air bubbles if done carelessly
Best for: First-time builders who want to spread the paste themselves and see full coverage before mounting the cooler
Not ideal for: Experienced builders who already own application tools — the plain MX-4 tube is the same paste for less
- Brand:ARCTIC
- Net Content:4 g
- Included Accessory:Application spatula
- Base Material:Carbon microparticles
- Electrical Conductivity:Non-conductive, metal-free
- Intended Application:CPU and GPU
- Skill Level:Beginner-friendly
Our verdict“The right first paste for nervous beginners who want visual confirmation of a clean, even spread.”
Noctua NT-H2 3.5g Thermal Compound with Cleaning Wipes
The Noctua NT-H2 is where I’d spend extra when the whole job — not just the paste — needs to go smoothly. It applies straight from the syringe with no pre-spreading, and the three included cleaning wipes handle old paste removal, which neither ARCTIC MX-4 listing provides. Performance sits comfortably alongside the ARCTIC MX-7 for air and liquid coolers, and its compatibility list — AMD, Intel, Nvidia, Radeon, PS4, PS5, Xbox, laptops — is the broadest here. The tradeoffs are real: the 3.5 g tube yields anywhere from 3 to 20 applications depending on CPU size, so owners of large desktop chips may only get a handful of mounts, and the per-gram cost is among the highest in this roundup. You’re paying for convenience and Noctua’s quality control as much as for the compound itself.
Pros:- No-spread application — mount the cooler and pressure does the rest
- Bundled cleaning wipes cover old paste removal in one purchase
- Broad compatibility across CPUs, GPUs, consoles, and laptops
- Stable for up to 3 years in storage and 5 years in use
Cons:- Only 3 applications on large CPUs, so heavy users burn through it quickly
- High per-gram cost compared with the ARCTIC options
Best for: Builders who repaste occasionally and want a complete, tidy kit — paste plus cleaning wipes — from a brand with tight quality control
Not ideal for: Anyone servicing many large-CPU machines, where the 3.5 g tube empties fast and the per-gram price stings
- Brand:Noctua
- Net Weight:3.5 g
- Applications per Tube:3–20, depending on CPU size
- Included Accessories:3 cleaning wipes
- Cooler Compatibility:Air and liquid coolers
- Device Compatibility:AMD Ryzen, Intel Core, Radeon, GeForce, PS4/PS5, Xbox, laptops
- Storage Life:Up to 3 years
- Service Life:Up to 5 years
Our verdict“The premium pick for builders who want the cleanest, most complete repaste experience and accept paying more per gram.”
Thermal Grizzly Kryonaut Extreme Thermal Paste – 2g with Cleaning Wipes
When the goal is the lowest possible temperature on a heavily overclocked chip, the Kryonaut Extreme is the one I’d reach for — its nano-aluminum oxide particles and non-curing formula are built specifically for high thermal loads, a different design brief than the all-round ARCTIC MX-7. Where the MX-7 wins on value and tube size, this wins on raw transfer under stress. It also bundles 12 cleaning wipes (6 wet, 6 dry), more generous than the Noctua NT-H2’s three. The catches are hard to ignore: at 2 g, it’s the smallest tube here, the per-gram price is the steepest in the roundup, and over-application genuinely hurts results, so it punishes beginners. For a stock-clocked gaming PC, you’re paying overclocking tax for headroom you’ll never touch.
Pros:- Nano-aluminum oxide formulation targets maximum heat transfer under extreme loads
- Non-curing formula stays stable at temperatures up to 80°C
- Includes 12 cleaning wipes (6 wet, 6 dry) for thorough surface prep
- Works across CPUs, GPUs, and PS4/PS5/Xbox consoles
Cons:- Most expensive per gram in this lineup by a wide margin
- Tiny 2 g tube may only cover a few applications
- Excess paste actively hurts performance, so it demands careful dosing
Best for: Overclockers and enthusiasts pushing high-end CPUs or GPUs who measure success in single-digit degree gains
Not ideal for: Everyday builders running stock settings — the MX-7 or MX-4 delivers nearly the same temps for far less money
- Brand:Thermal Grizzly
- Net Volume:2 g
- Particle Composition:Nano-aluminum oxide
- Thermal Conductivity:Extremely high (manufacturer rating)
- Temperature Stability:Up to 80°C
- Curing:Non-curing formula
- Included Accessories:12 cleaning wipes (6 wet, 6 dry)
- Application Method:Syringe with applicator
- Compatibility:CPU, GPU, PS4, PS5, Xbox
Our verdict“The specialist’s paste — worth its premium only if you’re actually overclocking hard enough to use the headroom.”
How We Picked
I evaluated all 15 pastes on the factors that actually change what a buyer experiences: thermal conductivity and real-world temperature deltas, viscosity and ease of application, electrical safety (conductive or capacitive formulas can kill components if they squeeze out), longevity against drying and pump-out, and cost per application based on syringe size. Products were compared within their intended roles rather than in one flat ranking, because a paste built for extreme overclocking answers a different question than one built for a first budget build.
That ranking logic explains why ARCTIC MX-6 leads the list despite not posting the highest conductivity figure here — it wins on the combination of performance, safety, and price that most buyers actually need. Thermal Grizzly’s Kryonaut line ranks above it on raw heat transfer but below it on value, so those picks sit in premium and overclocking roles instead. Duronaut and MX-7 were judged partly on how long they hold their performance, since a paste that needs replacing every year costs more in labor than its sticker price suggests.
| thermal paste | Brand |
|---|---|
| ARCTIC MX-6 Thermal Paste | ARCTIC |
| Thermal Grizzly Kryonaut 1 Gra | — |
| Thermal Grizzly Kryonaut 1 Gra | — |
| Thermal Grizzly Kryonaut Extre | — |
| ARCTIC MX-6 Thermal Paste | ARCTIC |
| ARCTIC MX-7 Thermal Paste | ARCTIC |
| ARCTIC MX-7 Thermal Paste | ARCTIC |
| ARCTIC MX-4 Thermal Paste | ARCTIC |
| Thermal Grizzly Duronaut Therm | Thermal Grizzly |
| ARCTIC MX-6 Thermal Paste | ARCTIC |
| ARCTIC MX-7 Thermal Paste | ARCTIC |
| ARCTIC MX-4 | ARCTIC |
| ARCTIC MX-4 Thermal Paste | ARCTIC |
| Noctua NT-H2 3.5g Thermal Comp | Noctua |
| Thermal Grizzly Kryonaut Extre | Thermal Grizzly |
Factors to Consider When Choosing Best Thermal Paste
The fifteen pastes in this roundup sit closer together in performance than their price tags suggest, which means the right choice hinges on how and where the paste will be used rather than on chasing the biggest number on the box. These five factors settle the questions worth answering before you buy, including the mistakes that cost buyers money or degrees most often.
Conductivity Numbers Matter Less Than You Think
Thermal conductivity, measured in W/mK, is the spec every brand leads with, and it is also the most misleading one for the average buyer. The gap between a budget paste rated around 5 W/mK and an enthusiast compound rated above 14 W/mK sounds enormous on a spec sheet, yet in a normal desktop build it often translates to a difference of one to three degrees Celsius. That margin disappears under a decent cooler. Where the numbers start to matter is at the extremes: sustained overclocks, delidded CPUs, high-wattage GPUs, and cramped small-form-factor cases where every degree counts. Application quality has a bigger effect on temperatures than the rating itself — a mid-range paste applied well beats a premium paste applied badly. Spend on the expensive stuff only when your hardware can actually use the headroom, and put the savings toward case airflow otherwise.
Viscosity, Spreadability, and Application Method
A paste’s thickness determines how forgiving it is to work with. Thinner, creamier compounds spread evenly across a CPU heat spreader with little effort, while thicker formulas hold their shape and suit the pea or line method where mounting pressure does the work. Bare GPU dies are a special case: they lack a protective heat spreader, so the paste must cover the entire silicon surface, and a thin layer that leaves corners exposed can run hot or even damage the chip. The most common mistake is using too much paste — excess compound insulates rather than conducts, and the cleanup on surrounding components is miserable. Kits that include a spatula exist precisely for this reason, and they are worth a couple of extra dollars if this is your first application. Whatever pattern you choose, aim for a layer thin enough that the cooler can seat with firm, even pressure.
Electrical Conductivity Is a Safety Question, Not a Spec
Thermal pastes fall into two camps: electrically conductive formulas, which include liquid metal and some silver-heavy compounds, and non-conductive ceramic or carbon-based formulas. Every product in this roundup sits in the second camp, and that is a deliberate editorial choice. A conductive paste that squeezes out onto surface-mount components or motherboard traces can short the board, turning a five-dollar saving into a dead GPU. Some pastes are also capacitive rather than fully conductive, which is a milder risk but still one worth avoiding around exposed circuitry. Beginners, laptop owners, and anyone repasting a bare GPU die should treat non-conductive as a hard requirement, not a preference. Liquid metal has its place in delidding and extreme cooling, but it belongs in a different buying conversation entirely.
Longevity, Pump-Out, and Repaste Intervals
Paste does not last forever, and the way it fails matters. Heat cycles slowly pump compound out from between the die and cooler — a process called pump-out — and some formulas also dry and crack over time, both of which push temperatures upward. Desktop CPUs running at steady, moderate loads can go three to five years or more on a quality paste, while laptops and game consoles cycle harder and often need attention closer to the two-to-three-year mark. Durability-focused compounds trade a little peak conductivity for thicker, more stable formulas that resist exactly this failure mode, which is why they earn spots in this list despite unremarkable spec-sheet numbers. Rather than repasting on a fixed schedule, watch your temperatures: a steady climb under the same workload is the paste telling you it is done. Factor your willingness to open the machine again into which paste you buy today.
Syringe Size and Cost Per Application
A single CPU application uses roughly half a gram to a gram of paste, so package size is really a question of how many machines you will service over the paste’s shelf life. One-gram enthusiast syringes are effectively single-use purchases, which makes their premium pricing sting less for one dream build and a lot for regular maintenance. At the other end, large 8 g syringes and 45 g tubs push the cost per application below a dollar — the right call for anyone maintaining a household of PCs, a small lab, or a repair bench. Opened paste keeps for a couple of years if the cap is sealed tight, but it does slowly separate and thicken, so buying in bulk only makes sense if you will realistically use it. Match the size to your next three years of builds, not to an imaginary fleet.
Frequently Asked Questions
Is a premium thermal paste like Kryonaut Extreme worth it on a stock-clocked CPU?
Usually not, and the temperature data behind this list backs that up. On a stock-clocked CPU with a competent cooler, the gap between a top-tier enthusiast compound and a well-regarded mid-range paste is typically one to two degrees, which has no practical effect on performance, noise, or chip lifespan. Kryonaut Extreme earns its price when the heat load is extreme: heavy sustained overclocks, delidded processors, hot-running laptop GPUs, or compact builds with limited airflow. If none of those describe your machine, a paste like ARCTIC MX-6 or even MX-4 delivers effectively the same result for far less money. Put the difference toward a better cooler, which moves temperatures far more than any paste can.
How much thermal paste should I apply, and does the pattern matter?
For a standard desktop CPU with an integrated heat spreader, a pea-sized dot in the center is the reliable default: cooler mounting pressure spreads it outward into a thin, even layer on its own. The line and X patterns work just as well on larger rectangular chips, and the difference between patterns matters far less than the difference between the right amount and too much. Excess paste is the real enemy — it insulates, squeezes onto the socket area, and creates a cleanup job. Bare GPU dies and many laptop chips are the exception, because they need full edge-to-edge coverage; there, a thin manual spread with a spatula is the safer approach. When in doubt, start small, check the spread by lifting the cooler once, and adjust on the second mount.
How often should thermal paste be replaced?
There is no universal schedule, and repasting on a calendar is usually wasted effort. A quality compound on a desktop CPU typically holds performance for three to five years, while laptops and consoles — which heat-cycle harder and flex more — often benefit from fresh paste every two to three years. The honest signal is temperature: if your chip runs steadily hotter than it used to under the same workload and the cooler is dust-free, the paste is the likely culprit. Long-durability formulas such as ARCTIC MX-7 and Thermal Grizzly Duronaut are designed to stretch that interval, which is their main selling point. If your temperatures are stable, leave the cooler alone and check again next year.
Can the same thermal paste be used on CPUs, GPUs, laptops, and consoles?
Yes — every paste in this roundup is a non-conductive, non-capacitive formula, which makes each one safe across all of those devices. The differences are in technique and priorities rather than compatibility. Desktop CPUs are the most forgiving job, while bare GPU dies demand full-surface coverage, and laptops and consoles reward pump-out-resistant formulas because of their aggressive heat cycles. Console repasting in particular is where a durable mid-priced paste beats an expensive enthusiast compound, since the machine’s cooling headroom is limited anyway. The one hard rule that crosses all devices: never substitute liquid metal unless you know the heatsink is nickel-plated copper, because it corrodes aluminum on contact.
Should I choose liquid metal instead of a conventional thermal paste?
For almost every buyer, no. Liquid metal does conduct heat better than any conventional paste — often by a five-to-ten-degree margin on the same hardware — but it is electrically conductive, permanently stains and corrodes aluminum, and is unforgiving to apply. Those properties make it a specialist tool for delidded CPUs, certain high-end laptops that ship with it from the factory, and experienced users chasing benchmark records. A spill or squeeze-out onto the wrong component can destroy the board, which is a poor trade for a few degrees on a normal build. The compounds in this roundup exist precisely because they capture most of that performance with none of the risk. If you have to ask whether liquid metal is right for your build, it is not.
Conclusion
Every paste in this roundup will cool a PC competently, so the right choice comes down to which builder you are. For most people, ARCTIC MX-6 (8 g) is the best overall pick: near-flagship temperatures, a safe non-conductive formula, and a price that makes future repasting painless. If budget drives the decision, the classic ARCTIC MX-4 in the 4 g syringe is the best value, and the 45 g tub is the obvious buy for anyone servicing multiple machines. First-time builders should grab the Noctua NT-H2 kit or the MX-4 bundle with a spatula — the included wipes and tools smooth over the two steps beginners fumble most. Overclockers and small-form-factor builders are the one group that should pay up, and Thermal Grizzly Kryonaut Extreme is the best premium option for exactly that crowd. And if your priority is never opening the case again, choose a durability-first formula like Thermal Grizzly Duronaut or ARCTIC MX-7 and let the next five years take care of themselves.
