A cooler can be perfectly capable and still run hot when the compound between its base and the processor is old, uneven, or poorly suited to the job. Thermal paste is a small part of a PC build, but it is one of the easiest places to lose cooling performance.
The Best CPU Thermal Paste choices here range from forgiving everyday compounds to thick formulas aimed at demanding CPUs, GPUs, and direct-die applications. We also included several package variations, since the included cleaner, spatula, and paste quantity can matter when you are servicing more than one machine.
For most builders, ARCTIC MX-6 8 g is the strongest all-round pick, while the rest of the list covers easier application, extreme workloads, smaller repairs, and long-term maintenance.
Comparison table
| # | Product | Award | Paste amount | Application style | Best for |
|---|---|---|---|---|---|
| 1 | ARCTIC MX-4 4 g | Best overall | 4 g | Easy to apply | First-time builders |
| 2 | ARCTIC MX-7 8 g | Best for repeated servicing | 8 g | Pressure-spread | Multi-system maintenance |
| 3 | Thermal Grizzly Kryonaut | Best for overclocking | 1 g | Spatula included | Demanding CPU and GPU work |
| 4 | ARCTIC MX-6 8 g | Best high-performance compound | 8 g | Viscous, pressure-spread | CPUs, GPUs, and consoles |
| 5 | ARCTIC MX-4 4 g Spatula | Best guided application | 4 g | Spatula included | Controlled manual spreading |
| 6 | BSFF Thermal Paste | Best small repair kit | 1.8 g | Toolkit included | One-off CPU or GPU work |
| 7 | ARCTIC MX-7 4 g Cleaner | Best with surface cleaner | 4 g | Pressure-spread | Clean rebuilds |
| 8 | ARCTIC MX-6 4 g Cleaner | Best compact MX-6 kit | 4 g | Viscous, pressure-spread | Direct-die and console work |
| 9 | Noctua NT-H2 | Best cleaning bundle | 3.5 g | No pre-spreading needed | Neat PC maintenance |
| 10 | ARCTIC MX-6 4 g | Best compact high-performance paste | 4 g | Viscous, pressure-spread | Single-system upgrades |
1. ARCTIC MX-4 4 g: Best Overall
Pros
- Easy consistency for beginners
- Carbon microparticle formula
- Metal-free and non-conductive
- Rated for at least 8 years after application
Cons
- Older formula than MX-6 and MX-7
- No cleaning accessory included
- Smaller quantity suits occasional use
Best for: first-time builders who want a forgiving, widely useful compound.
The appeal of ARCTIC MX-4 4 g is its lack of drama. It has the kind of consistency that makes a processor repaste feel manageable rather than fussy, and the formula is intended to work across processors and graphics cards. That matters when you are not trying to tune every last fraction of cooling performance and simply want a clean, safe installation.
ARCTIC uses carbon microparticles in MX-4 and describes the compound as highly thermally conductive. The more useful detail for a builder is that it is metal-free and electrically non-conductive, so an imperfect edge around the processor is less concerning than it would be with a conductive liquid metal product. The paste is also designed to remain useful for at least 8 years after application, which makes it a sensible fit for a system that will be left assembled for a long time.
Compared with ARCTIC MX-6 8 g, MX-4 is the easiergoing option, while MX-6 is the more performance-focused formula. Noctua NT-H2 is another straightforward alternative, but it brings cleaning wipes and a stated application range that makes it particularly appealing for planned maintenance. MX-4 wins when you want a familiar application experience without needing to think much about technique.
The weakness is that this is not the newest or most ambitious compound in the group. Its 4 g quantity is also better suited to a single build or several modest applications than to a repair bench serving multiple systems. Anyone chasing the lowest possible thermal resistance should move up to MX-6 or Kryonaut.
For a standard desktop CPU, laptop service job, or GPU repaste, MX-4 remains a sensible starting point. It is the tube we would hand to a new builder who wants safety, easy handling, and long service life without turning thermal compound into a project.
2. ARCTIC MX-7 8 g: Best for Repeated Servicing
Pros
- Large 8 g quantity
- Dense, highly viscous consistency
- Designed to resist pump-out and dry-out
- Non-conductive and non-capacitive
- Spreads under cooler pressure
Cons
- Cannot be manually spread by design
- Thick consistency may feel unfamiliar
- No cleaner bundled in this version
Best for: builders who maintain several CPUs, GPUs, laptops, or consoles.
ARCTIC MX-7 8 g makes the most sense when a single repair is not the whole story. The generous tube is aimed at repeated applications, and its dense texture gives it a more deliberate feel than MX-4. It is not a paste to casually smear across the heat spreader with a finger or card. The design expects cooler mounting pressure to do the spreading.
That distinction affects the installation. MX-7 has high filler content and a highly viscous consistency, then relies on low adhesion to form a thin bond line as the cooler is tightened down. ARCTIC says this approach helps avoid trapped air bubbles. It also says the compound resists pump-out, dry-out, and bleeding through repeated thermal cycles, traits that matter in systems that heat and cool frequently.
The 8 g format separates this version from ARCTIC MX-7 4 g Cleaner, which uses the same paste concept but adds a surface-cleaning accessory. If you already have a reliable cleaning process, the larger tube is the more practical workshop choice. ARCTIC MX-4 4 g is simpler for a first installation, but MX-7 is more compelling for repeated servicing and demanding thermal cycles.
Its main drawback is application confidence. Someone used to manually spreading a thin layer may initially distrust the instruction to leave the paste to the cooler. The compound is also more paste than most people need for one CPU, so a one-off builder may prefer the smaller format.
MX-7 8 g is the sensible choice for a repair kit, a household with several computers, or anyone who frequently changes coolers. It is safe for CPUs, GPUs, laptops, and consoles, giving the larger tube unusually broad usefulness.
3. Thermal Grizzly Kryonaut: Best for Overclocking
Pros
- Built for demanding applications
- Intended for overclocking workloads
- Spatula supports precise spreading
- Stated not to dry out at 80°C
- Suitable for CPU, GPU, and consoles
Cons
- Only 1 g of paste
- Manual spreading adds a step
- Less suitable for servicing many systems
Best for: enthusiasts who want a purpose-built compound for demanding thermal work.
Thermal Grizzly Kryonaut has a more enthusiast-oriented personality than the ARCTIC options. It is positioned for demanding configurations and overclocking, and the supplied syringe and spatula make the installation feel more controlled. That can be useful when you want to deliberately cover a particular contact area instead of relying entirely on mounting pressure.
The tube contains 1 g, so this is a focused purchase rather than a general maintenance supply. Thermal Grizzly says Kryonaut is designed for high thermal conductivity and can be used in industrial cooling systems, though its more practical appeal here is for a high-output CPU, graphics card, or console that needs fresh compound. The formula is also described as retaining its performance without drying out at 80°C.
The included spatula is a meaningful difference from ARCTIC MX-7 8 g, whose paste is specifically not intended for manual spreading. Kryonaut gives the user more direct control, while ARCTIC MX-6 8 g offers a larger quantity and a similarly performance-minded approach for people working across several devices. Kryonaut is the one to choose when the application itself matters as much as the amount in the tube.
The weakness is simple: 1 g disappears quickly if you are servicing large contact surfaces or several devices. Manual spreading can also create more opportunity for an uneven layer if you rush. This is not the paste we would choose for a beginner who wants the least complicated mounting process.
For an enthusiast replacing compound on a high-performance CPU or GPU, Kryonaut remains an attractive specialist option. If your cooling setup is already carefully tuned, this is the product in the group that most clearly matches that mindset.
4. ARCTIC MX-6 8 g: Best High-Performance Compound
Pros
- Lower thermal resistance than MX-4
- Large 8 g quantity
- Suitable for direct-die cooling
- Safe for CPUs, GPUs, and consoles
- Non-conductive and non-capacitive
Cons
- Viscous consistency needs firm cooler mounting
- No cleaner or spatula included
- More compound than a single build usually needs
Best for: enthusiasts who want MX-6 performance across multiple devices.
ARCTIC MX-6 8 g is the strongest all-round performance choice in this group. It is an improved formula over MX-4, with ARCTIC stating that its thermal resistance is measurably lower and its performance is 20 percent better. Those claims do not turn paste into a substitute for a good cooler, but they explain why MX-6 sits ahead of the older formula.
The compound is also built for more than a conventional desktop heat spreader. Its viscosity makes it suitable for direct-die cooling on graphics cards and console processors, where the contact arrangement can be less forgiving. Since MX-6 is neither electrically conductive nor capacitive, it avoids the short-circuit and discharge concerns associated with conductive compounds.
The 8 g tube gives it an advantage over ARCTIC MX-6 4 g, especially for builders who work on several PCs or want spare compound for future maintenance. Thermal Grizzly Kryonaut is a more enthusiast-specific rival and includes a spatula, but MX-6 is easier to justify as a general workshop compound because it combines broad compatibility with a much larger supply.
The main weakness is the thick consistency. It is not as immediately friendly as MX-4, and the user needs to mount the cooler evenly so pressure can distribute the paste properly. The large tube also makes less sense for someone replacing compound on one ordinary desktop and not touching it again.
For a powerful CPU, a console repair, a GPU service, or a small collection of systems, MX-6 8 g is the most versatile high-performance pick. It is the right upgrade when you want something beyond the familiar baseline without moving to a conductive compound.
5. ARCTIC MX-4 4 g Spatula: Best Guided Application
Pros
- Familiar MX-4 formula
- Spatula included
- Easy consistency for beginners
- Metal-free and non-conductive
- Authenticity check is available
Cons
- Same older formula as standard MX-4
- Only 4 g
- Manual spreading is not essential for every cooler
Best for: anyone who wants a tool-assisted, deliberate paste application.
The ARCTIC MX-4 4 g Spatula package is the practical version for people who would rather see the paste coverage before installing the cooler. The compound itself is the established MX-4 formula, with carbon microparticles, an easy consistency, and a metal-free, non-conductive composition. The differentiator is the included spatula.
That tool can be useful when working on an exposed GPU die, a console processor, or any surface where you want to smooth the compound across the contact area. It also gives a nervous first-time builder a clear process: apply a small amount, spread it evenly, then mount the cooler. MX-4 is forgiving enough that this approach does not require specialist technique.
The package is closely related to ARCTIC MX-4 4 g, which provides the same core paste without the spatula. The standard package is the cleaner choice for users who prefer pressure spreading, while this one is more appealing if you do not already have a suitable spreading tool. Thermal Grizzly Kryonaut also includes a spatula, but its 1 g quantity and enthusiast focus make it a less general-purpose alternative.
This version does not solve MX-4's age relative to MX-6. The spatula is also not mandatory for every CPU cooler, and manually spreading paste can introduce a little extra handling. Anyone seeking the lowest thermal resistance should look at MX-6 instead.
Choose this package when application control matters more than chasing the newest formula. It is particularly useful for careful console or graphics card maintenance, where a visible, even layer can make the work feel more predictable.
6. BSFF Thermal Paste: Best Small Repair Kit
Pros
- Compact 1.8 g quantity
- Toolkit included
- Metal-free and non-conductive
- Designed for CPU, GPU, IC, and heatsink work
- Claimed 5-year durability after application
Cons
- Less paste than the larger ARCTIC tubes
- Limited brand history in this selection
- Not the clearest choice for repeated servicing
Best for: a one-off CPU, GPU, IC, or heatsink repair with basic tools included.
BSFF Thermal Paste is aimed at the small repair rather than the enthusiast bench. Its 1.8 g quantity is enough to keep the package compact, and the included toolkit means a user can tackle a CPU, GPU, IC, or heatsink job without assembling every accessory separately. That makes it a practical option for a single repair where convenience matters.
The formula is described as metal-free and non-conductive, with carbon microparticles intended to help transfer heat from the processor or graphics chip. BSFF also says the paste is designed to retain its performance for at least 5 years after application. Those details make it safer and more appropriate for general device work than a conductive compound.
Compared with ARCTIC MX-4 4 g Spatula, BSFF offers a smaller amount but a more repair-kit-oriented presentation. Noctua NT-H2 provides cleaning wipes and a more clearly specified application range, while BSFF is the simpler choice when you mainly need paste and basic tools. It is also less suited to a workshop than ARCTIC MX-7 8 g, which provides much more compound and is built around repeated thermal cycling.
The limitation is the lack of detail compared with the better-established formulas here. The 1.8 g tube is sensible for one job, but it does not leave much room for repeated experimentation or several large contact surfaces. We would skip it for a multi-system maintenance kit.
BSFF is best treated as a focused repair purchase. It makes sense for a user replacing dried compound on one device, especially when having a small toolkit in the same package is more useful than owning a large tube for future work.
7. ARCTIC MX-7 4 g Cleaner: Best With Surface Cleaner
Pros
- MX-7 formula in a compact package
- MX-Cleaner included
- Resists pump-out and dry-out
- Non-conductive and non-capacitive
- Pressure spreads the paste naturally
Cons
- Cannot be manually spread by design
- Smaller quantity than the 8 g version
- Thick texture needs careful cooler mounting
Best for: a clean CPU or GPU rebuild when old compound needs thorough removal.
The standout feature of ARCTIC MX-7 4 g Cleaner is not a different paste formula. It is the pairing of MX-7 with MX-Cleaner, which makes the package more complete for a fresh installation. Removing old compound properly is easy to overlook, yet a clean contact surface is essential when the goal is consistent heat transfer.
MX-7 itself is dense and highly viscous. ARCTIC designed it to be left in place rather than manually spread, allowing cooler pressure to create a thin bond line without trapping air bubbles. High cohesion is intended to reduce pump-out, dry-out, and bleeding as the system moves through repeated thermal cycles. The compound is also non-conductive and non-capacitive, so it is suitable for CPUs, GPUs, laptops, and consoles.
The smaller format is easier to justify for a single build than ARCTIC MX-7 8 g, while the cleaner gives it a practical edge over that larger tube if your current supplies are running low. ARCTIC MX-6 4 g Cleaner is the higher-performance-oriented alternative, but MX-7 has the more maintenance-focused character.
The main learning curve is the application method. Users who instinctively reach for a spatula may be uncomfortable leaving a thick bead to spread under the cooler. The 4 g quantity is also less useful for a repair bench servicing many machines.
This is the package we would pick for a planned repaste where the old compound is already dried or messy. It keeps the process focused: clean the surface, apply MX-7, mount the cooler evenly, and let the compound form its own bond line.
8. ARCTIC MX-6 4 g Cleaner: Best Compact MX-6 Kit
Pros
- Improved MX-6 composition
- Cleaner included
- Suitable for direct-die applications
- Non-conductive and non-capacitive
- Compact 4 g format
Cons
- Thick consistency may require careful mounting
- Less paste than the 8 g version
- Cleaner adds usefulness only when servicing
Best for: a single high-performance repaste that needs surface preparation.
ARCTIC MX-6 4 g Cleaner combines the most capable ARCTIC formula in this list with a useful preparation accessory. The 4 g quantity is appropriate for a single desktop build or a small number of repairs, while the cleaner helps remove old compound before the new layer goes down. That pairing avoids the common mistake of treating surface preparation as an optional extra.
MX-6 is described as having 20 percent better performance than MX-4 through lower thermal resistance. Its viscosity also suits direct-die cooling on graphics cards and console processors, which broadens its use beyond a conventional CPU heat spreader. Since the compound is neither electrically conductive nor capacitive, it is a reassuring choice around exposed electronics.
The cleaner separates this package from ARCTIC MX-6 4 g, which contains the same core compound without the bundled preparation accessory. ARCTIC MX-6 8 g is the better fit for repeated work, while this version is more efficient for one serious maintenance job. If you are comparing thermal compound options for a hotter processor, how to match the compound to a capable cooling system is also worth considering.
The drawback is the same one shared by MX-6 generally: it is viscous. It needs even cooler pressure, and a user who wants to spread paste manually may find the texture less cooperative than MX-4. The 4 g tube also gives less flexibility for future jobs than the 8 g version.
Pick this package when you want MX-6's performance characteristics and know the contact surface needs a proper cleanup. It is a particularly good fit for a console, GPU, or compact PC repair where a larger workshop tube would be unnecessary.
9. Noctua NT-H2: Best Cleaning Bundle
Pros
- No pre-spreading required
- Three NA-CW1 cleaning wipes included
- Suitable for air and liquid coolers
- Supports CPU, GPU, laptop, and console use
- Specified 3 to 20 application range
Cons
- Stated usage life is up to 5 years
- Smaller quantity than MX-6 8 g
- Cleaning wipes are not useful for every installation
Best for: tidy PC maintenance with a clearly defined application process.
Noctua NT-H2 is the neatest package for users who want the maintenance process clearly covered. The 3.5 g tube comes with three NA-CW1 cleaning wipes, and Noctua says the paste needs no pre-spreading before the heatsink is installed. That combination keeps the job simple without requiring a separate cleaning supply.
Noctua positions NT-H2 for air coolers and liquid coolers, including DIY and all-in-one systems. It also lists CPUs, GPUs, PS4, PS5, Xbox, and laptops among its intended applications. The stated yield ranges from around three applications on a large TR4 processor to around 20 on an LGA1200 processor, so the number of systems it can cover depends heavily on contact size.
The wipes give NT-H2 a different personality from ARCTIC MX-4 4 g, which is simpler but does not include cleaning materials. ARCTIC MX-7 4 g Cleaner provides a similar clean-installation idea with a thicker pressure-spread compound, while NT-H2 is friendlier to anyone who wants to mount the cooler without manually distributing the paste. For laptop owners, keeping heat under control in a cramped chassis can matter just as much as choosing the compound.
The stated recommended usage time on the CPU is up to 5 years, which is shorter than MX-4's claimed 8 years. The 3.5 g tube also has less capacity than the larger ARCTIC options, although its stated application range is broad for ordinary desktop processors.
NT-H2 is a polished choice for routine maintenance. It suits the person who wants clean surfaces, minimal application fuss, and a compound that can move between desktop, GPU, laptop, and console work.
10. ARCTIC MX-6 4 g: Best Compact High-Performance Paste
Pros
- Lower thermal resistance than MX-4
- Compact 4 g quantity
- Suitable for direct-die cooling
- Non-conductive and non-capacitive
- Broad CPU, GPU, laptop, and console use
Cons
- No cleaner included
- Viscous application needs even mounting pressure
- Less suitable for multiple system repairs
Best for: a single-system upgrade where performance matters more than bundled extras.
ARCTIC MX-6 4 g is the straightforward version of the MX-6 formula. It keeps the lower thermal resistance and broad application range while trimming the package to a quantity that makes sense for one desktop, laptop, graphics card, or console service. There is no cleaner to manage and no extra tool to account for, just the compound itself.
The paste is designed for a wide range of contact arrangements, including direct-die cooling on graphics cards and console processors. ARCTIC describes it as neither electrically conductive nor capacitive, which removes a major concern when applying compound around exposed components. Its viscosity is part of the reason it can handle those applications, but it also means the cooler must be mounted evenly.
This tube is effectively the focused alternative to ARCTIC MX-6 8 g. The larger tube is the better workshop choice, while this one is more sensible when you have one system in front of you. ARCTIC MX-6 4 g Cleaner adds surface preparation, and Thermal Grizzly Kryonaut offers a more manually controlled application with its spatula, so the choice comes down to whether you want simplicity, cleaning support, or spreading control.
The missing cleaner is the obvious limitation. You will need to prepare the surface with supplies already on hand, and the thick paste may not feel as easy as MX-4 for a first application. It is also not the right format for maintaining a whole stack of computers.
For a single performance-focused repaste, however, MX-6 4 g is easy to understand. It gives you the newer ARCTIC formula, broad device compatibility, and a compact quantity without adding accessories you may not need.
How to choose best cpu thermal paste
The right compound depends less on marketing language than on contact size, application technique, electrical safety, and how often the system will be opened.
Thermal resistance and heat transfer
Thermal paste fills microscopic gaps between the processor and cooler base. A compound with lower thermal resistance can help heat move across that interface more efficiently, but it cannot compensate for a poorly mounted cooler, blocked airflow, or an undersized heatsink.
For demanding desktop CPUs and overclocked systems, look at formulas positioned for high thermal performance, such as MX-6 and Kryonaut. For ordinary upgrades, an easy-to-apply compound such as MX-4 may be the more sensible choice because a consistent layer matters more than a small theoretical advantage.
Consistency and mounting pressure
Thin, forgiving pastes are easier for beginners to handle manually. Dense pastes can remain stable through repeated thermal cycles, but they generally need even pressure from the cooler to form the correct bond line.
MX-7 specifically should not be manually spread. MX-6 is also viscous, while MX-4 and NT-H2 are less intimidating for a first installation. If the cooler mounting hardware is awkward or uneven, prioritize a compound that you can apply predictably.
A paste that is difficult to distribute evenly can erase the benefit of a more advanced formula.
Electrical safety
Non-conductive and non-capacitive compounds reduce the risk of a short circuit if a small amount reaches nearby components. This is especially important on GPUs, consoles, laptops, and direct-die applications, where the contact area may expose more surrounding electronics.
Every product in this selection is presented as non-conductive or electrically safe in its product details. That does not mean you should be careless. Apply only what is needed and clean the surface before installation.
Quantity and application count
A 1 g tube can be suitable for a single enthusiast job, but it is not an efficient workshop supply. A 4 g package covers a normal build and leaves some room for another application, while 8 g is more useful for multiple PCs, GPUs, laptops, or consoles.
Noctua gives a range of around three to 20 applications for its 3.5 g package, depending on processor size. Large direct-die surfaces use more compound than a conventional desktop CPU, so match the quantity to the devices you actually plan to service.
Surface preparation and durability
Old compound should be removed before fresh paste is applied. Bundled cleaners and wipes make that process easier, especially during a GPU, laptop, or console repair where residue can be awkward to reach.
Long-term stability also matters for systems that go through frequent heating and cooling. MX-7 is designed to resist pump-out, dry-out, and bleeding, while MX-4 is described as lasting at least 8 years after application. Noctua lists a recommended CPU usage time of up to 5 years for NT-H2.
Frequently asked questions
How much thermal paste should I apply to a CPU?
Use enough to fill the microscopic gaps between the processor and cooler, but avoid creating a thick layer. The correct amount depends on the processor's contact area and the paste's consistency. MX-7 is designed to spread under cooler pressure rather than being manually spread first.
Is non-conductive thermal paste safer?
Yes. A non-conductive compound lowers the risk of a short circuit if a small amount reaches nearby electrical contacts. It is still important to apply carefully, particularly around exposed GPU or console processor surfaces.
Can CPU thermal paste be used on a GPU?
Many compounds are suitable for both CPUs and GPUs, including the ARCTIC, Thermal Grizzly, BSFF, and Noctua products in this roundup. Check the product's stated application guidance and make sure the old compound is fully removed before applying the new layer.
Does thermal paste expire?
Thermal paste can dry out or become harder to apply after extended storage. The products differ in their stated service guidance. MX-4 is described as lasting at least 8 years after application, while Noctua recommends up to 5 years of use on the CPU.
Should I spread thermal paste manually?
Not always. MX-7 specifically relies on cooler pressure to distribute the compound, and NT-H2 does not need pre-spreading. A spatula can be useful for controlled coverage on some GPUs and direct-die surfaces, but spreading is not automatically better for every cooler.
Is a larger tube better for one PC?
Usually not. A 4 g tube is more appropriate for one system or occasional maintenance, while 8 g makes more sense if you service several devices. Larger quantities are useful only if the compound will be stored properly and used before its application characteristics change.
Can thermal paste lower CPU temperatures by itself?
Fresh compound can improve the interface between a CPU and heatsink when the existing layer is old, dry, or poorly applied. It cannot fix inadequate cooler capacity, poor case airflow, an uneven mounting system, or an unusually high processor workload.
The bottom line
The Best CPU Thermal Paste pick for most people is ARCTIC MX-6 8 g. Its improved composition, broad compatibility, non-conductive design, and suitability for direct-die work make it the most capable all-round option, especially for builders who may service more than one device.
Choose ARCTIC MX-4 4 g if easy handling matters more than maximum performance, or Thermal Grizzly Kryonaut if you are working on an enthusiast system and want a spatula-assisted application. Noctua NT-H2 is the cleanest maintenance package, while the MX-7 bundles are especially attractive for repeated thermal cycling and prepared surfaces.
If you are undecided, choose MX-4 for simplicity, MX-6 for performance, and Noctua NT-H2 when clean installation is your priority.
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