Best Thermal Paste for Gaming PC in 2026

For most gaming PC builders, ARCTIC MX-7 in the standard 4 g tube is the best thermal paste to buy in 2026. It is non-conductive, so a slightly sloppy application will not short anything, it is formulated to resist pump-out over long heat cycles, and a single tube covers several CPU or GPU jobs. If you want the cheapest sensible option for a first build, ARCTIC MX-4 remains a proven carbon-based paste that is forgiving to spread. If you chase the last degree on an overclocked processor or a hot graphics card, Thermal Grizzly Kryonaut is the enthusiast pick, and it ships with cleaning wipes for the old-paste removal that good repasting depends on.

This guide covers ten ready-to-buy options, including several sizes of the ARCTIC MX-7, the earlier MX-6 and MX-4, a Corsair syringe, a Thermal Grizzly kit, and two lesser-known generic pastes. Below you will find a short list of the best picks, a side-by-side comparison, a detailed look at each product, and a decision guide with a worked example showing how many applications a given tube really covers.

Top 3 Picks

Best overall: ARCTIC MX-7 (4 g). It combines a modern, high-cohesion formulation with a non-conductive, non-capacitive base and enough paste for multiple CPU or GPU repastes. Arctic claims it runs about 3 percent cooler than MX-6 on its own test platform, and it is the easiest recommendation for anyone who does not want to think about paste again for years.

Best budget: ARCTIC MX-4 (4 g). A long-standing favorite that is easy to spread, electrically safe, and still perfectly capable of keeping a stock or mildly overclocked gaming CPU well within its limits. For a first build, it removes risk without demanding fussy technique.

Best premium: Thermal Grizzly Kryonaut with cleaning wipes (1 g). Built for demanding cooling setups, it is aimed at overclockers and small-form-factor builders whose heat flux is high. The included wet and dry wipes make the removal step cleaner, though one gram only covers a few applications.

Quick Comparison

Product	Best for	Key specs
ARCTIC MX-4 (4 g)	First builds and low-risk upgrades	4 g tube; carbon-based; non-conductive; broad processor compatibility
Thermal Paste 1.8 g with Toolkit	One-off repaste with tools included	1.8 g; toolkit for CPU, GPU, IC and heatsinks; unbranded
ARCTIC MX-7 (8 g)	Workshops and multi-PC households	8 g; long-durability formulation; non-conductive
Corsair TM30 (3 g)	Easy syringe application on desktops	3 g; applicator included; low thermal impedance claim; silver
Thermal Grizzly Kryonaut (1 g + wipes)	Overclocking and tight, hot builds	1 g; 12 wipes (6 wet, 6 dry); high-performance, non-conductive paste
ARCTIC MX-7 (4 g)	Best all-round choice	4 g; long durability; non-conductive; CPU and GPU use
ARCTIC MX-7 (4 g with MX-Cleaner)	Removing old paste cleanly	4 g paste plus Arctic cleaner; same MX-7 formulation
ARCTIC MX-6 (4 g)	CPUs, consoles, laptops and graphics cards	4 g; very high thermal conductivity claim; long durability; non-conductive
ARCTIC MX-7 (2 g)	A single build or one GPU repaste	2 g; same MX-7 formulation in a small tube
Generic 12.8 W/mK paste (4 g)	Budget buyers who want a large tube	4 g; 12.8 W/mK listing claim; non-corrosive, non-conductive; made in USA

How We Chose

This list is built from manufacturer specifications, published datasheets, independent lab write-ups, and the product names and descriptions on each listing. We did not run our own temperature runs, and we do not claim measured results. Instead we weighed six things. First, electrical safety: non-conductive, non-capacitive pastes are far more forgiving around socket pins and GPU components. Second, durability claims, because pump-out and dry-out matter more over years than a one-degree difference on day one. Third, practicality for a gaming PC, meaning how the paste spreads and whether it suits both CPU and GPU work. Fourth, tube size relative to how many applications a builder realistically needs. Fifth, bundled extras such as cleaning wipes or applicators. Sixth, transparency: a named brand with a published datasheet earned more trust than a bare W/mK number on a listing. Where a spec could not be verified, we describe the category rather than guess.

1. ARCTIC MX-4 (4 g) – Best for First Builds and Easy Application

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ARCTIC MX-4 is the paste many builders learned on, and it still earns its place. It is a carbon micro-particle compound that is electrically non-conductive and non-capacitive, which means a smear that creeps toward a capacitor or socket contact is an annoyance rather than a dead motherboard. The listing describes it as a premium performance paste for all processors, and the 4 g tube is generous enough for several CPU jobs or a graphics card repaste.

It suits first-time builders, people refreshing a five-year-old desktop, and anyone who wants a predictable, low-drama paste. Its comparatively fluid consistency spreads readily, so the common pea-sized dot technique works without special tools.

• Size: 4 g tube
• Base: carbon micro-particles, non-conductive and non-capacitive
• Durability: Arctic quotes up to eight years of service life in its materials
• Compatibility: all common CPU sockets, plus GPUs and consoles

The strength of MX-4 is its balance. Independent lab measurements generally place its effective thermal conductivity in the low single digits, well below the headline figures printed on some rival packaging, yet real cooler performance depends far more on mounting pressure and bond-line thickness than on a W/mK claim. That is why it has stayed a reference point for a decade. It also offers good value relative to its volume, which is a practical edge when you maintain more than one machine.

Practical notes

A good way to think about MX-4 is as the paste you buy when the cooling hardware is the real investment. A mainstream tower air cooler or a 240 mm liquid loop paired with a midrange gaming processor will spend most of its life well below its thermal limits, and in that situation the difference between this paste and a pricier tube is a degree or two at most. Where it falls short is at the extremes: a heavily overclocked chip pulling well over its stock power limit will expose any weakness in conductivity or bond-line thickness. Builders also like that the tube is large enough to cover a CPU build now and a graphics card refresh later without a second purchase. Expect to clean and replace the layer every few years rather than treating it as permanent, since any paste slowly changes with repeated heat cycles. If you are moving between sockets or re-seating a cooler, always wipe both surfaces completely before applying fresh paste, because mixing old and new layers undermines contact.

Pros

• Forgiving to apply, with no special spreading technique required
• Non-conductive and non-capacitive for safer handling
• Large 4 g tube covers many repastes
• Widely documented, so troubleshooting advice is easy to find

Cons

• Older formulation than MX-6 and MX-7, so peak performance trails them
• Some independent labs rate its long-term stability on hard-working graphics cards as only average
• Not aimed at extreme overclocking

Compared with the nearest alternative, ARCTIC MX-6 (4 g), MX-4 is the thinner, easier-to-spread paste, while MX-6 is a newer formulation that Arctic says offers lower thermal resistance. If your cooler and CPU are mainstream, the gap is small enough that MX-4 remains a rational choice. If you are building a hotter system and are willing to spend a little more care on application, step up to the MX-7 tubes further down the list.

2. Thermal Paste CPU 1.8 g with Toolkit – Best for Beginners Who Need Tools

This unbranded paste is sold as a 1.8 g tube with a toolkit for CPU, GPU, IC and heatsink work. Its appeal is simplicity: you receive paste and the small accessories that make a first repaste less awkward, typically spreaders and cleaning aids, although you should confirm the exact contents on the listing since the name does not itemize them.

It fits a very specific buyer: someone repasting a single PC, a laptop, or a small electronic board once, who does not own a spatula, lint-free wipes, or alcohol and would rather get everything in one parcel. The 1.8 g quantity is plenty for one CPU and perhaps a second small job.

• Size: 1.8 g
• Extras: toolkit included, per the listing name
• Intended use: CPU, GPU, IC chips and heatsinks
• Brand data: no thermal conductivity or durability figures in the listing name

The honest limitation is transparency. Without a named manufacturer datasheet, you cannot compare its viscosity, curing behavior, or electrical properties to ARCTIC or Corsair products. For a mid-range desktop CPU running a stock cooler, that rarely matters, because almost any decent silicone-based compound beats a dry, five-year-old layer. For a high-wattage processor or a long-lived workstation, a paste with published specifications is the safer purchase.

How to get the most from a kit like this

The best use of a small tool-and-paste bundle is a methodical, unhurried repaste. Power the system down, unplug it, and let the heatsink cool. Remove the old compound with a lint-free cloth and a small amount of high-percentage isopropyl alcohol, wiping in one direction and letting the surface fully dry. Apply a single rice-grain to pea-sized amount at the center, mount the heatsink straight down, and tighten screws in a cross pattern so pressure is even. Do not twist the cooler once it touches the paste. If the kit includes a spreader, use it sparingly: spreading can trap air bubbles, and many builders prefer the simple center dot. Afterward, run a short load check while watching temperatures in monitoring software. If idle temperatures are unusually high or climb quickly under load, the usual culprits are uneven mounting, a missing protective film on the cooler base, or too little pressure, not the paste itself.

Pros

• Bundled tools remove the need for separate purchases
• Small quantity suits a one-time job
• Works for CPUs, GPUs and smaller ICs

Cons

• No published conductivity, durability or viscosity data in the listing
• Low volume leaves little margin for a redo
• Electrical properties should be confirmed before use near exposed components

Next to the ARCTIC MX-7 (2 g), the closest in size, this kit trades documented performance for convenience. If you already own isopropyl alcohol and wipes, the MX-7 tube is the more dependable use of the same budget. If you need the extras and have a simple cooling task, this package is serviceable. Keep the paste off socket pins and gold contacts, and treat it as non-conductive only if the seller states so.

3. ARCTIC MX-7 (8 g) – Best for Workshops and Multi-PC Households

The 8 g MX-7 is the volume play. It carries the same modern formulation as the smaller tubes, marketed for ultimate performance and long durability, but doubles the quantity of the standard 4 g size. Anyone who builds PCs for friends, maintains a family fleet of desktops, runs a small repair bench, or swaps coolers often will get through a tube like this.

MX-7 is dense and cohesive, designed to stay put through repeated heating and cooling. Arctic describes it as non-conductive and non-capacitive, and says it improves on MX-6 in its own data. Press coverage of Arctic’s launch material reports about 3 percent cooler operation than MX-6 and up to 6 percent versus MX-4 on a recent flagship processor; these are manufacturer claims, so treat them as indications rather than guarantees.

• Size: 8 g
• Formulation: MX-7, high-cohesion, long durability
• Electrical: non-conductive and non-capacitive
• Consistency: thick; apply as a dot or line rather than expecting it to spread like a thin gel

Because it is thick, MX-7 rewards a bit of technique. A center dot under firm, even cooler pressure usually spreads sufficiently; the compound is not meant to be smeared thin with a card. That is a mild drawback for total beginners but a non-issue for anyone who has used MX-6 before.

Where the extra grams matter

The bigger tube makes sense beyond just replacing a CPU layer. Console owners who open older machines, laptop owners comfortable with disassembly, and people who service graphics cards all benefit from having enough paste to do each job without rationing. It also suits someone who builds several systems a year, such as a content creator maintaining a render box and a gaming rig, or a parent managing a few household desktops. The practical limit is shelf life: a tube that sits half-used for years can separate or stiffen, so unless you truly expect many applications, a smaller size is more economical in practice. If you do buy the 8 g size, store it capped, upright, and away from heat, and check the consistency before use. Wipe the nozzle clean after every application so dried residue does not clog it.

Pros

• Largest MX-7 tube, with the best value per application
• Modern formulation aimed at durable bonding
• Safe around electronics thanks to its non-conductive base

Cons

• Overkill if you only build or repaste once every few years
• Thick consistency can intimidate first-timers
• Opened paste ages, so a very large tube may outlive its usefulness

Compared with the ARCTIC MX-7 (4 g), the contents are identical; the decision is about quantity. With a realistic budget of roughly 0.3 to 0.5 g per application, 8 g stretches to between 16 and 26 jobs, which is far more than a single household needs. Choose the 4 g tube unless you genuinely service many machines.

4. Corsair TM30 (3 g) – Best for Easy Syringe Application

Corsair TM30 is a performance thermal paste that arrives in a 3 g syringe-style tube with an applicator, in a silver shade meant for desktop CPUs and GPUs. The syringe is the practical hook: dispensing a controlled bead is simpler than squeezing a tube, which helps newcomers avoid applying far too much.

Corsair positions TM30 as an ultra-low-impedance, zinc-oxide-based compound that is non-conductive and free of volatile components. Retail specification sheets give a thermal conductivity of 3.8 W/mK and a specific gravity around 2.5. That conductivity is modest beside some premium pastes, but it is typical of a safe, easy-to-use formulation, and Corsair says it stays stable without drying or cracking over years.

• Size: 3 g
• Applicator: included per the listing name
• Base: zinc oxide, non-conductive
• Target: desktop CPUs and GPUs

The brand also helps. Buyers who already run Corsair coolers, cases, or memory may like having a single support channel, and a mainstream manufacturer is more likely to keep a datasheet and replacement path available than an anonymous seller.

Using the applicator well

Syringe delivery makes TM30 an easy choice for people who worry about overdoing it. A small bead the size of a grain of rice or a pea at the center of the processor’s heat spreader is typically sufficient, and the applicator lets you place it precisely. Because the formulation is relatively fluid, mounting pressure will do the spreading; resist the urge to add extra. After use, wipe the tip and recap the syringe promptly so the compound does not dry at the opening. On a laptop or a very small die, squeeze out less than you think you need, since the surface area is tiny. The silver finish is cosmetic and irrelevant to function, though it means any accidental smear is easy to spot and clean while you work, which is a small but real advantage for tidy builders.

Pairing TM30 with a mainstream air cooler or an all-in-one liquid cooler is where it makes the most sense. The paste does not demand exotic mounting, so the cooler’s own pressure and the quality of the cold plate matter more than any quirk of the compound. If you later move the cooler to a new processor, clean and reapply instead of trusting the old film.

Pros

• Applicator and syringe make controlled dosing easy
• Non-conductive and free of volatile compounds
• Reputable brand with documented specifications

Cons

• Conductivity figure is modest versus enthusiast pastes
• Product lifecycle can vary by retailer, so confirm availability if you want a specific tube
• 3 g is smaller than the 4 g Arctic tubes

Against ARCTIC MX-4 (4 g), the nearest like-for-like alternative, TM30 offers friendlier dispensing but less paste and no clear performance edge. If application ease is your priority, the Corsair syringe is attractive. If you want the most paste and the widest track record, MX-4 usually wins.

5. Thermal Grizzly Kryonaut with Cleaning Wipes (1 g) – Best for Overclocking and Hot Builds

Thermal Grizzly Kryonaut is a long-running favorite among overclockers and small-form-factor builders, and this listing pairs a 1 g syringe with twelve cleaning wipes, six wet and six dry. The wipes address the step many first-time repasters botch: removing every trace of old compound before the new layer goes on.

Retail listings commonly quote 12.5 W/mK for Kryonaut, while the manufacturer itself puts the emphasis on low thermal resistance rather than a headline conductivity number. Either way, it is built for high-heat-flux situations such as unlocked processors under heavy load or compact cases with limited airflow. The paste is non-electrically-conductive, so a stray dab will not short a board, although spills are still best cleaned up.

• Size: 1 g
• Included: 12 cleaning wipes (6 wet, 6 dry)
• Electrical: non-conductive
• Intended use: demanding CPU and GPU cooling

The compromise is quantity. One gram supports roughly two or three CPU applications at typical amounts, and fewer on a large GPU die with a thicker bead. Anyone who plans to repaste annually or service multiple PCs will find the value per application notably lower than with a 4 g Arctic tube.

Who really needs this tier

It is worth being candid about the value question. A high-end paste only pays off when the rest of the cooling chain is strong: a large air cooler or a 280 mm or bigger radiator, good case airflow, and a processor or GPU that actually runs hot. In that setup, a few degrees can mean sustaining higher boost clocks or lower fan speeds. In a modest build, the extra expense is mostly bragging rights. Small-form-factor cases are the exception, since constrained airflow magnifies every thermal inefficiency. The wipes are also a thoughtful addition, because leftover residue is a leading cause of disappointing repaste results. With only one gram available, plan your application carefully, use the dot method, and avoid wasting paste on trial mounts; if you have to lift the cooler, clean and reapply rather than reusing what is already compressed.

Think of it as a precision tool: it rewards a clean surface, a careful dot, and even mounting pressure, and it punishes sloppy prep just like any other paste would.

Pros

• Enthusiast-grade formulation aimed at high thermal loads
• Wet and dry wipes simplify surface preparation
• Non-conductive for safer handling

Cons

• Only 1 g, so it runs out quickly
• Premium positioning is not justified on a modest office or light gaming PC
• Real-world gains over a good mid-range paste are usually a few degrees at most

Compared with ARCTIC MX-7 (4 g), the nearest premium-minded rival, Kryonaut is the choice when you want its particular formulation and a built-in cleaning kit; MX-7 is the better value when you want the same class of result with four times the paste.

6. ARCTIC MX-7 (4 g) – Best Overall for Gaming PCs

The 4 g MX-7 is the standard-issue answer to the question most builders ask. It delivers the newest Arctic formulation in a tube large enough for a CPU now and a GPU repaste later, without paying for a workshop-sized quantity. Arctic markets it for ultimate performance and long durability, and the design goal is cohesion: a paste that stays in place instead of migrating out from between the die and the cooler through hundreds of heat cycles.

Like its predecessors it is non-conductive and non-capacitive, so it is safe for the everyday mistakes of home builders. It is also dense and thick, a consequence of high filler content, so the usual advice is a central dot or short line and firm, even mounting pressure rather than attempting to spread it with a card.

• Size: 4 g
• Formulation: MX-7, positioned above MX-6 in Arctic’s range
• Electrical: non-conductive, non-capacitive
• Manufacturer claim: about 3 percent cooler than MX-6 and up to 6 percent cooler than MX-4 on Arctic’s own flagship-processor comparison

Independent lab write-ups describe the improvement over earlier generations as real but not dramatic, and that is the correct expectation. The practical benefits are consistency, better behavior over time, and a bond that holds when a graphics card heats and cools every evening. For a typical gaming desktop, you are buying peace of mind and a small thermal edge, not a transformation.

Why it takes the top spot

Three reasons put it ahead of the field. It is safe, it is durable by design, and the 4 g size matches how most people actually use paste: one primary build, one maintenance cycle, and a spare application for a friend or a second component. Nothing else on this list combines those traits with such a recognized brand.

Using it on a graphics card

Graphics cards deserve a note of their own. A GPU die is smaller than a CPU heat spreader, so the amount of paste should be smaller too, roughly a large grain of rice. Most cards also use thermal pads on memory chips and power stages, and those pads need to be left intact or replaced with identical thickness. Repasting a GPU is worth considering when hotspot temperatures climb or fan noise creeps up after several years of use. The 4 g tube leaves enough compound for that job after a CPU installation, which is a quiet reason this size is so popular with builders who plan ahead.

Pros

• Latest Arctic formulation with a durability focus
• Non-conductive and non-capacitive for safer handling
• Right-sized tube for typical home use
• Works on CPUs, GPUs and other heat sources

Cons

• Thick consistency demands a little technique
• Gains over MX-6 are modest
• Not intended to be spread thin with a spatula

Against ARCTIC MX-6 (4 g), the closest alternative, MX-7 is the better pick when both are readily available; Arctic describes it as denser and less viscous than MX-6, which should make it a little easier to work with and slightly better at holding position. If MX-6 is noticeably cheaper on the day you shop, it is still an excellent choice and will not leave your system hotter in any way you would notice during play.

7. ARCTIC MX-7 (4 g, incl. MX-Cleaner) – Best for Replacing Old Paste Cleanly

This bundle takes the same 4 g MX-7 tube and adds an Arctic cleaning product, named MX-Cleaner in the listing. The paste itself is identical to the plain 4 g version, so the question is only whether you value the cleaner. For anyone replacing a layer that has been baking for years, the answer is usually yes.

Old thermal paste dries, hardens and sometimes turns almost chalky. Scraping it with a fingernail or a dry paper towel leaves residue that increases the thickness of the new bond line. A dedicated cleaner dissolves the film so the metal heat spreader and cooler base can be wiped back to a bare, uniform surface before the fresh paste goes on.

• Paste: 4 g of MX-7, non-conductive, long-durability formulation
• Extra: MX-Cleaner included, per the listing name
• Best moment to buy: when you are removing a hardened, aged layer
• Typical use: CPU and GPU repaste on desktops

A clean-surface routine that works

Begin by warming the CPU slightly or running the system for a few minutes, because slightly warm paste wipes away more easily. Power down and unplug before touching anything. Lift the cooler with a gentle twist if it has stuck. Wipe the bulk of the old paste in one direction, apply the cleaner to a lint-free cloth rather than pouring it onto the board, and wipe the heat spreader and cooler plate until the cloth comes away clean. Allow everything to dry fully before applying a fresh dot. Keep liquid away from socket pins and memory slots at all times.

Who benefits most

This bundle suits the owner of a four- or five-year-old desktop whose processor temperatures have crept up, a buyer who inherited a used cooler with dried paste still on the plate, and anyone assembling a second-hand build. It also suits gift buyers who want a ready-to-go package. Because the paste inside is the same as the plain 4 g tube, nothing about performance changes; the value is in a complete job done correctly the first time. Keep the cleaner capped between uses, and apply it to the cloth, not directly onto components, to protect nearby parts.

Pros

• Cleaner and paste from the same manufacturer
• Removes the residue that ruins second applications
• Same modern MX-7 formulation as the standard tube

Cons

• Pointless extra if you already own isopropyl alcohol and wipes
• Thick paste still requires a measured application
• Check the listing for how much cleaner is supplied, as the name does not say

Compared with the plain ARCTIC MX-7 (4 g), you are paying for convenience. If you own a bottle of 90 percent or higher isopropyl alcohol and lint-free cloths, buy the plain tube. If you have never repasted a machine and want a single, matched package, this bundle removes a trip to the pharmacy and a guess about what solvent is safe for your parts.

8. ARCTIC MX-6 (4 g) – Best for Consoles, Laptops and Mixed Devices

ARCTIC MX-6 was the company’s headline paste before MX-7 arrived, and the listing describes it as an ultimate-performance compound for CPUs, consoles, graphics cards and laptops, with very high thermal conductivity and long durability, and non-conductive. That breadth of use is the point: one tube can serve a gaming desktop, a console that has started to run loud, and a laptop whose fans spin up too early.

Arctic claimed a meaningful reduction in thermal resistance versus MX-4 at launch, and independent lab measurements agree that MX-6 beats MX-4 on effective conductivity. It is thicker than MX-4, so it is applied as a dot or short line, and it benefits from firm, even mounting pressure.

• Size: 4 g
• Intended devices: CPUs, consoles, graphics cards, laptops
• Electrical: non-conductive
• Durability: Arctic quotes up to eight years of service life for a single application

Why it still deserves a look

Newer is not always necessary. MX-7 improves on MX-6 by a few percent in Arctic’s own comparison, which for a console or office laptop is well below what a user will notice. If MX-6 is the version you can find in stock, it remains a top-tier pick for mixed-device households. The small, tight enclosures of consoles and thin laptops are good fits for a durable, non-conductive compound because the owner is unlikely to repaste again soon.

One caution for laptops: thin machines often use thermal pads on memory and power components alongside paste on the processor. Replace pads that look torn or compressed, and never substitute paste for pads where the manufacturer used one, since the gap height is different.

Choosing between MX-6 and its neighbors

A simple way to decide is to look at what you are fixing. If the target is a gaming CPU and you can find MX-7 readily available, take MX-7. If the target is a console that has become noisy, MX-6 does the job and leaves leftover paste for a second device. If your system is a hand-me-down laptop, remember that disassembly is the larger challenge than paste choice, and plan time, screwdriver bits and clean workspace accordingly. Photographing each step of disassembly helps you reassemble without leftover screws.

Pros

• Versatile across desktops, consoles and laptops
• Meaningful step up from MX-4 in published lab data
• Non-conductive and built for longevity

Cons

• Superseded by MX-7 in Arctic’s range
• Thick, so not as easy to spread as MX-4
• Some independent labs rate long-term stability on graphics cards as only average

Against ARCTIC MX-7 (4 g), the call is simple: take MX-7 for a new gaming build, and MX-6 when availability favors it or when you want one proven tube for a console, a laptop and a desktop. The performance difference between them is small, so do not delay a repaste waiting for the newer one.

9. ARCTIC MX-7 (2 g) – Best for a Single Build or One-Time Repaste

The 2 g MX-7 is the right size for someone who knows they will use paste once. It is the same cohesive, non-conductive formulation as the larger tubes, just in a quantity that fits a single processor install or a one-off graphics card repaste, with a little left for a mistake.

A new PC builder assembling one machine does not need 8 g of compound. Two grams covers a desktop CPU several times over, according to the planning math in the guide below, and the smaller tube is less likely to sit half-used and dry out in a drawer. It is also a sensible gift-size purchase for a friend who has just bought a cooler without paste.

• Size: 2 g
• Formulation: MX-7, long durability, non-conductive
• Ideal for: one CPU install, one GPU repaste, or a small laptop job
• Estimate: roughly four to six applications at 0.3 to 0.5 g each

Making a small tube last

Because the tube is small, technique matters. Use the central dot method with an amount about the size of a grain of rice for smaller chips, or a little larger for big heat spreaders. Never squeeze a test blob onto a plate to look at it, and avoid reapplying if the cooler seat was good. If you have to lift the cooler to adjust something, wipe both surfaces clean and start fresh instead of trying to reuse what is compressed. Cap the tube and keep it in a cool, dry place away from direct sunlight.

Is two grams really enough?

For most people, yes. A CPU install uses a fraction of a gram, and a second attempt after reseating the cooler still leaves paste for a graphics card refresh down the road. The tube becomes inadequate only when you service several computers or repeat the job often. Compared with the 4 g size, the extra expense per gram is small in absolute terms, so buyers who are unsure should consider whether a spare couple of grams is worth keeping for emergencies such as a cooler swap after an upgrade.

Pros

• Modern MX-7 formulation without paying for unused paste
• Enough for a CPU install plus a spare attempt
• Compact, easy to store, easy to gift

Cons

• Runs out quickly if you service multiple machines
• Lower value per gram than the 4 g and 8 g sizes
• No cleaner or tools included

Compared with the Thermal Paste CPU 1.8 g with Toolkit, the nearest alternative by size, this tube gives you a documented, branded formulation but no accessories. If you already have wipes and alcohol, it is the better choice. If you need tools in the box and are not concerned about brand data, the kit is more convenient.

10. Generic 12.8 W/mK Thermal Paste (4 g, Made in USA) – Best for Buyers Who Want a Big Tube on a Tight Budget

This listing is for a thermal paste for computer CPU, GPU and laptop use, described as 12.8 W/mK, made in the USA, in a 4 g quantity, and non-corrosive and non-conductive for all processors. It is the least documented product in this roundup, and the bold conductivity number should be taken as a manufacturer claim rather than a standard-comparable measurement.

Thermal conductivity figures printed on packaging are not directly comparable across brands. Different companies measure bulk conductivity, not the effective performance of a thin layer between real metal surfaces, and some numbers on retail pages are more marketing than physics. For that reason, we treat this paste as a plausible, budget-oriented option, not as a performance leader.

• Size: 4 g
• Claimed conductivity: 12.8 W/mK, per the listing
• Safety claims: non-corrosive and non-conductive
• Origin: made in the USA, per the listing

What to keep in mind

The advantage is quantity at a presumably low entry point, in a 4 g tube equivalent to the standard Arctic size. That suits builders who want to practice, who repaste a lot, or who maintain several older machines where a premium formulation would be wasted. The disadvantage is accountability: with an unfamiliar brand, there is no extensive body of independent lab testing, long-term durability reports, or community knowledge on its pump-out behavior. If you pick it, apply a conservative amount, use a firm, even mount, and monitor temperatures for a few weeks after the install to catch any drift.

A sensible way to use an unfamiliar paste

If you decide to try it, treat the first install as a trial. Record idle and load temperatures before the change, repaste, and compare under the same workload and room temperature. If the numbers are close to your previous paste, you have a workable budget compound. If they look worse, switch to a branded tube without regret. Also confirm that the compound is rated for the temperatures your component reaches, and keep it away from socket pins, even though the listing describes it as non-conductive.

Pros

• Large 4 g quantity for repeated jobs
• Non-corrosive and non-conductive claims
• Domestic manufacturing claim may appeal to some buyers

Cons

• Headline conductivity is a listing claim without independent corroboration here
• Limited durability and pump-out information
• Less community knowledge than Arctic or Thermal Grizzly products

Next to ARCTIC MX-4 (4 g), which is its closest equivalent in size and likely use, this paste offers a bigger printed spec but far less track record. For anything you care about, such as a main gaming rig or a graphics card you plan to keep for years, the Arctic tube is the lower-risk path. For a secondary machine, it is a reasonable economy choice.

How to Choose the Right Thermal Paste

Choosing a paste is less about the biggest printed number and more about matching four variables: your heat load, your skill level, how often you will repaste, and how much paste you really need. The sections below turn those into concrete decisions.

Match the paste to your heat load

A processor that draws 65 to 125 W under gaming load and uses a decent tower cooler is in comfortable territory for any mainstream paste on this list. Chips that regularly exceed 150 to 250 W, or graphics cards with small dies and high power density, reward a better paste and careful mounting. In that range, the extra outlay for Kryonaut or a fresh MX-7 layer is rational. For office PCs and light gaming systems, MX-4 or a generic tube is enough.

Why the printed W/mK number misleads

Thermal resistance across a paste layer follows a simple relationship: resistance equals thickness divided by conductivity times area. Take a spreader contact area of about 17 square centimeters (0.0017 square meters) and a layer 50 micrometers thick, which is a realistic figure for a well-mounted cooler. With a conductivity of 4 W/mK, resistance is 0.00005 divided by (4 times 0.0017), or about 0.0074 K/W. At a 150 W load, that is a temperature drop across the paste of about 1.1 degrees C. With a conductivity of 12.5 W/mK, resistance falls to about 0.0024 K/W, which is a drop of about 0.35 degrees C. The theoretical gap between a modest and a premium paste is under one degree at 150 W. In practice, the larger real-world gains come from correct mounting pressure, a flat clean surface and a layer that does not pump out, which is why durability and handling often matter more than a headline number.

How much paste you need: a worked estimate

Assume a planning figure of 0.3 to 0.5 g per application, which covers the thin film itself plus normal waste. At that rate, a 1 g tube covers about 2 to 3 applications, a 1.8 g tube about 3 to 6, a 2 g tube about 4 to 6, a 3 g tube about 6 to 10, a 4 g tube about 8 to 13, and an 8 g tube about 16 to 26. A typical enthusiast who builds once and repastes the CPU and GPU every three years needs well under 2 g across a decade, so the 4 g size already provides a generous margin. Buy 8 g only if you service many machines.

Decision matrix

Your situation	Best pick	Why
First build, mainstream CPU	ARCTIC MX-4 (4 g)	Forgiving, safe, plenty of paste
Gaming build, wants long-term stability	ARCTIC MX-7 (4 g)	Durability-focused formulation, right size
Replacing years-old paste	ARCTIC MX-7 (4 g, incl. MX-Cleaner)	Cleaner removes hardened residue
Overclocked CPU or compact case	Thermal Grizzly Kryonaut with wipes	High-heat-flux formulation plus prep wipes
Easy dosing, desktop only	Corsair TM30 (3 g)	Syringe and applicator reduce over-application
Console, laptop and desktop in one household	ARCTIC MX-6 (4 g)	Listed for many device types
Single install, minimal waste	ARCTIC MX-7 (2 g)	Right-sized tube
Fleet of PCs or a repair bench	ARCTIC MX-7 (8 g)	Best value per application
Need tools in the box, one-off job	Thermal Paste 1.8 g with Toolkit	Bundled accessories
Secondary machine, large tube wanted	Generic 12.8 W/mK paste (4 g)	Quantity over documentation

Application technique and safety

Apply a rice-grain to pea-sized dot at the center of the processor’s heat spreader. For rectangular spreaders on large workstation sockets, a short line along the long axis works better. Mount the cooler straight down, tighten screws diagonally in small increments, and do not twist. Use isopropyl alcohol at 90 percent or higher with lint-free cloths for removal. Keep conductive pastes, which are not covered in this list, away from any circuit board. All of the Arctic, Corsair and Thermal Grizzly products here are described as non-conductive, but you should still avoid contaminating socket pins. Finally, check that any protective film on a new cooler base is removed.

When to replace paste

For a desktop gaming PC, repasting every three to five years is a sensible habit, or sooner if idle temperatures climb noticeably, fan speeds ramp up at lower loads, or you notice a processor throttling in a game that did not trouble it before. Graphics cards, with their frequent heat cycles, are the typical candidates for earlier attention. Laptops and consoles are best done when fan noise or temperature clearly worsens.

Frequently Asked Questions

How much thermal paste should I use on a gaming CPU?

A small dot about the size of a grain of rice to a pea is enough for most desktop processors. The mounting pressure of the cooler spreads it into a thin film. Too much paste can squeeze out the sides and, with conductive types, cause problems, while too little risks uncovered areas.

Is non-conductive thermal paste really safer?

Yes, a non-conductive and non-capacitive paste will not short components if a small amount reaches nearby contacts. It still should be wiped away, since residue can attract dust. Pastes from ARCTIC, Corsair and Thermal Grizzly in this guide are described as non-conductive.

How often should I replace thermal paste?

Every three to five years is a common interval for desktop CPUs, with graphics cards sometimes needing attention sooner. If temperatures rise at idle or under the same load, or if a cooler has been removed, replace it. Manufacturers may quote longer lifespans, but ideal conditions are rare.

Do I need to remove the old paste first?

Yes, always. Residue creates an uneven, thicker bond line and can contain dust or hardened material. Use a lint-free cloth and isopropyl alcohol, then let the surface dry before applying new compound.

Is a higher W/mK number always better?

No. Conductivity figures are measured under different methods and are not directly comparable between brands. The effective performance of a thin layer depends on pressure, surface flatness and bond-line thickness, which is why the gap between mid-range and premium pastes is often only a degree or two at typical loads.

Can I use the same paste on a GPU, console or laptop?

Often yes, but check the product description and the device’s design. Many graphics cards, consoles and laptops use thermal pads on memory or power stages, and these should be replaced with pads of the right thickness, not with paste. ARCTIC MX-6 is listed for CPUs, consoles, graphics cards and laptops.

Does thermal paste need to cure or break in?

Some pastes settle over the first hours or days of use, and temperatures can improve slightly as they do. Do not judge a result in the first minute. Check after a few heat cycles before deciding whether the application needs redoing.

Is it worth paying more for Kryonaut over MX-4?

For an overclocked processor, a hot graphics card or a small case with limited airflow, it can be. For a typical gaming PC with a decent cooler, the difference is small, and the larger MX-4 or MX-7 tubes offer better value.

Our Recommendation by Situation

For most gaming PCs, buy the ARCTIC MX-7 (4 g) and stop shopping. If you are new to building and want an easy, low-risk start, pick ARCTIC MX-4 (4 g). If you are replacing aged paste, choose the MX-7 bundle with MX-Cleaner. Overclockers and small-form-factor builders should consider Thermal Grizzly Kryonaut with its wipes, remembering that one gram goes quickly. Households with consoles, laptops and desktops will get good use from ARCTIC MX-6, while repair benches should buy the 8 g MX-7. Everyone else can choose by tube size and let careful mounting do the rest.

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