The best thermal paste for most gaming PC builds is ARCTIC MX-4, which has held its position as one of the most trusted value compounds in PC building for years and remains available here from $4.99 to $5.99 depending on size and included spatula. Among the eight tubes we compared, ranging from $4.99 to $11.99, the real differences come down to thermal conductivity rating, included accessories, and tube size relative to how many applications you actually need.
Thermal paste is one of the few components where spending more doesn’t guarantee a dramatically better outcome for a typical gaming build — the law of diminishing returns kicks in quickly once you’re past a baseline-quality compound, which is exactly what this comparison bears out.
As an Amazon Associate we earn from qualifying purchases at no extra cost to you. Product prices and availability are accurate as of the date shown and are subject to change.
Top 3 picks at a glance
Top picks at a glance
| Model | Key spec | Price | Best for |
|---|---|---|---|
| ARCTIC MX-7 (4g) | Higher conductivity than MX-4, no accessories | $7.33 | Upgraded value pick |
| ARCTIC MX-4 (4g) | Proven baseline compound | $4.99 | Best overall value |
| ARCTIC MX-4 (4g, w/ Spatula) | Same compound, includes spatula | $5.49 | First-time builders |
| ARCTIC MX-4 (8g, w/ Spatula) | Double the paste, includes spatula | $5.99 | Multiple applications |
| BSFF Thermal Paste | 1.8g with toolkit | $5.99 | Complete beginner kit |
| Thermal Grizzly Kryonaut (1g + wipes) | Premium compound, 12 cleaning wipes | $11.99 | Overclockers wanting a full kit |
| ARCTIC MX-7 (4g, w/ MX-Cleaner) | Higher conductivity, includes cleaner | $9.48 | Upgrade with cleanup included |
| Thermal Grizzly Kryonaut (1g) | Premium compound, no accessories | $8.99 | Cheapest Kryonaut option |
ARCTIC MX-4 (4g)
MX-4 has been ARCTIC’s flagship value compound for years, and this 4g tube at $4.99 remains the benchmark other budget-to-mid-range pastes get compared against. It uses a carbon-based, non-conductive, non-corrosive formula, which makes it a genuinely safe choice for first-time builders nervous about paste bridging electrical contacts on the CPU or accidentally touching the motherboard.
A 4g tube is enough for roughly 5-8 applications on a typical desktop CPU using the pea-sized dot method, making this a cost-effective choice if you plan to reapply paste over multiple builds or repaste sessions across several years. Its thermal conductivity rating sits in a solid mid-range tier — not the absolute highest on the market, but more than sufficient for a stock or mildly overclocked gaming CPU where the difference against premium pastes typically amounts to just a few degrees at most.
MX-4’s application consistency is genuinely beginner-friendly: it’s neither too runny (risking spillage onto surrounding components) nor too thick (making even spreading difficult), which matters more for a first-time builder’s results than a marginal conductivity rating advantage.
Who it’s for: virtually every gaming PC builder, from first-timers to experienced hobbyists doing a routine repaste, who want proven performance without paying a premium.
Pros
- Long-established, proven performance and reliability track record
- Non-conductive, non-corrosive formula is safe for beginners
- 4g tube covers 5-8 applications, good value per application
Cons
- No spatula included in this specific listing, unlike the two variants below
- Conductivity rating trails premium options like Thermal Grizzly Kryonaut
- No cleaning solution included for removing old paste before application
ARCTIC MX-4 (4g, incl. Spatula)
Functionally identical to the base MX-4 tube above in terms of the paste itself, this listing adds a plastic spatula for $5.49 — a 50-cent premium over the no-accessory version. The spatula helps with the alternative spreading method some builders prefer over the dot method, particularly on larger CPU dies like AMD’s Threadripper or when working with an unusually shaped cooler contact patch.
For most standard desktop gaming CPUs, the dot method with mounting pressure from the cooler doing the spreading works fine without a spatula, so this accessory is more of a convenience than a necessity for typical builds. Still, having one on hand removes any guesswork for builders who prefer manual spreading or who are working with a cooler that has uneven mounting pressure.
The performance characteristics — conductivity, consistency, safety profile — are identical to the base MX-4 tube, so the decision between the two comes down entirely to whether the spatula is worth the small price difference to you.
Who it’s for: builders who want the reliable MX-4 compound plus a spreading tool without hunting for a separate spatula purchase.
Pros
- Same proven MX-4 compound as the base tube
- Included spatula useful for manual spreading methods
- Minimal price premium over the accessory-free version
Cons
- Spatula is unnecessary for most standard dot-method applications
- Same 4g size limits total applications compared to the 8g variant below
- No cleaning solution included
ARCTIC MX-4 (8g, incl. Spatula)
This is the largest MX-4 tube in the roundup at 8g, doubling the base tube’s paste volume while still including a spatula, for $5.99 — just a dollar more than the base 4g tube. For anyone planning multiple builds, a household with several gaming PCs to maintain, or simply wanting a long-term supply on hand, this is clearly the best per-application value among the MX-4 variants.
At 8g, this tube covers roughly 10-16 applications using the standard pea-sized dot method, effectively doubling the base tube’s coverage for a marginal price increase. The compound itself remains identical to the smaller tubes — same conductivity rating, same non-conductive safety profile, same application consistency.
The tradeoff with any larger paste tube is shelf life once opened; most manufacturers recommend using opened paste within a few years for best performance, so this only represents genuinely better value if you’ll use it across multiple applications within a reasonable timeframe rather than letting most of it go unused.
Who it’s for: builders maintaining multiple systems, PC repair hobbyists, or anyone who wants a long-term paste supply at the best per-gram price in this roundup.
Pros
- Best per-application value of any tube in this roundup
- Includes a spatula at essentially no extra cost over the smaller tube
- Same proven MX-4 compound performance and safety profile
Cons
- Only useful as a value pick if you’ll actually use multiple applications before shelf life becomes a concern
- Same conductivity ceiling as the smaller MX-4 tubes, below premium options
- No cleaning solution included for prepping the surface before application
ARCTIC MX-7 (4g)
MX-7 is ARCTIC’s step-up compound above MX-4, using a higher-conductivity formula for $7.33 — roughly $2.34 more than the base MX-4 tube of the same size. ARCTIC markets this as their “ultimate performance” tier below their most extreme offerings, positioning it as a meaningful but not dramatic upgrade path for builders who want more headroom than MX-4 without stepping all the way up to premium pricing.
The improved thermal conductivity should translate to modestly lower CPU temperatures under sustained load compared to MX-4, though the real-world gap on a typical gaming CPU at stock or mild overclock settings is usually in the low single digits of degrees Celsius rather than a dramatic difference. Where MX-7 earns its premium more clearly is on higher-TDP CPUs pushed harder, where every degree of headroom matters more for sustained boost clocks.
Like MX-4, this is a non-conductive formula safe for beginners, and the application process and consistency should feel familiar to anyone who has used ARCTIC’s other compounds before.
Who it’s for: builders who want a meaningful step up from MX-4’s baseline performance without jumping to Thermal Grizzly Kryonaut’s premium price point.
Pros
- Higher thermal conductivity than MX-4 for modestly better sustained temperatures
- Same trusted ARCTIC brand and non-conductive safety profile
- Reasonable middle-ground price between MX-4 and premium pastes
Cons
- No spatula or cleaning solution included in this specific listing
- Real-world temperature improvement over MX-4 is often modest for typical gaming builds
- Costs roughly 47% more than the base MX-4 tube for a smaller practical gain than the price jump suggests
ARCTIC MX-7 (4g, incl. MX-Cleaner)
This MX-7 listing bundles ARCTIC’s own MX-Cleaner solution alongside the same higher-conductivity paste, for $9.48 — a $2.15 premium over the accessory-free MX-7 tube. MX-Cleaner is specifically formulated to remove old thermal paste residue without leaving streaks or residue of its own, which is a genuine convenience over generic isopropyl alcohol for builders who don’t already have cleaning supplies on hand.
Performance characteristics match the standalone MX-7 tube exactly, since it’s the same compound — modestly better conductivity than MX-4, with the clearest benefit showing up on higher-TDP CPUs or overclocked configurations rather than stock mainstream gaming builds. The included cleaner adds genuine value for a repaste job specifically, where removing old, dried paste cleanly matters for getting a good fresh application.
At $9.48, this is priced between the two Thermal Grizzly Kryonaut listings in this roundup, positioning it as a reasonable middle-ground bundle for builders doing a repaste who want both the paste and cleaning solution in one purchase.
Who it’s for: builders doing a repaste job on an existing system who want MX-7’s improved conductivity plus a dedicated cleaning solution in one purchase.
Pros
- Includes dedicated MX-Cleaner solution for repaste jobs
- Same improved conductivity as the standalone MX-7 tube
- Convenient one-purchase solution for cleaning and reapplication
Cons
- No spatula included despite the added cleaner accessory
- Priced close to the cheaper Thermal Grizzly Kryonaut listing in this roundup
- Cleaner adds less value for a fresh build with no old paste to remove
Thermal Grizzly Kryonaut (1g)
Kryonaut is one of the most respected premium thermal compounds in PC building, commonly used by overclockers and reviewers as a benchmark reference paste, and this 1g tube costs $8.99 — nearly double MX-4’s price for a quarter of the volume. Its higher thermal conductivity rating genuinely outperforms both ARCTIC compounds in this roundup, particularly under sustained heavy load on high-TDP CPUs.
A 1g tube covers roughly 1-2 applications on a standard desktop CPU, which is a real limitation if you’re not specifically planning just one careful application — this is not a paste to buy expecting multiple reapplications the way the larger ARCTIC tubes allow. For a single high-stakes application, such as a heavily overclocked flagship CPU under an AIO or custom loop, the premium price is easier to justify given the measurable temperature advantage in those demanding scenarios.
Kryonaut’s consistency is notably thicker than ARCTIC’s compounds, which some experienced builders prefer for precise application control but can be slightly less forgiving for first-time users worried about spreading evenly.
Who it’s for: overclockers and enthusiasts running high-TDP CPUs under demanding sustained loads who want the best available conductivity for a single careful application.
Pros
- Higher thermal conductivity than both ARCTIC compounds in this roundup
- Trusted benchmark-grade paste used widely in the overclocking community
- Thicker consistency allows for precise manual application
Cons
- 1g covers only 1-2 applications, far less than the ARCTIC tubes
- Nearly double MX-4’s price for a fraction of the volume
- Real-world benefit is modest for stock-clocked mainstream gaming CPUs
Thermal Grizzly Kryonaut (1g, incl. 12 Cleaning Wipes)
This Kryonaut bundle adds twelve cleaning wipes — six wet and six dry — for $11.99, a $3 premium over the standalone 1g tube. Thermal Grizzly explicitly markets this bundle for demanding applications including CPU, GPU, and even console hardware like PS4/PS5/Xbox thermal maintenance, broadening its practical use beyond just a desktop gaming PC build.
The paste itself is identical to the standalone Kryonaut tube — same premium conductivity rating, same thicker application consistency, same 1-2 application coverage from the 1g volume. The included wipes handle both the cleaning and final polishing steps of a repaste job, which is a genuine convenience for anyone without cleaning supplies already on hand, particularly useful given how many different surfaces (CPU, GPU, console APU) this bundle is positioned to service.
At $11.99, this is the most expensive single item in the entire roundup, though the value case improves if you’re specifically doing a repaste across multiple devices — a gaming PC’s CPU and GPU plus a console, for example — where the wipe count and marketed versatility genuinely get used.
Who it’s for: enthusiasts repasting multiple devices (CPU, GPU, console) who want premium paste and a complete cleaning kit in one purchase.
Pros
- Same premium Kryonaut conductivity as the standalone tube
- Twelve wet and dry wipes cover multiple cleaning and repaste jobs
- Explicitly marketed for CPU, GPU, and console applications
Cons
- Most expensive item in this entire roundup
- Still only 1-2 paste applications despite the added wipes
- Overkill for a single fresh gaming PC build with no repaste need
BSFF Thermal Paste (1.8g, with Toolkit)
This budget-oriented listing pairs 1.8g of thermal paste with a small toolkit for $5.99, positioned as an all-in-one option for CPU, GPU, and general heatsink applications. Unlike the established ARCTIC and Thermal Grizzly brands elsewhere in this roundup, BSFF has a much shorter and less independently verified track record in the thermal compound space.
At 1.8g, this covers roughly 2-3 applications, sitting between the small Kryonaut tubes and the larger ARCTIC options in terms of coverage. Without independent conductivity ratings or long-term reliability data comparable to ARCTIC or Thermal Grizzly’s established track records, we’d treat performance claims from this listing with more caution than the established brands in this comparison.
The included toolkit is a reasonable value-add for a first-time builder who doesn’t already own basic application and cleaning tools, even if the paste itself carries more uncertainty than the proven alternatives in this roundup.
Who it’s for: absolute first-time builders on a tight budget who want a complete toolkit bundled in and are willing to accept a less-established paste brand.
Pros
- Includes a toolkit for a genuinely all-in-one purchase
- Positioned for CPU, GPU, and general heatsink use
- Reasonable price point similar to the ARCTIC MX-4 8g bundle
Cons
- Less established brand track record than ARCTIC or Thermal Grizzly
- No independently verified conductivity rating available for comparison
- Smaller paste volume than the comparably-priced ARCTIC 8g bundle
How we tested and picked
Daniel Kovac has spent eleven years building and rebuilding systems as a workshop technician specializing in cooling and power delivery, now running a thermal chamber, decibel meter, and PSU load tester as Components Editor. For this roundup, we compared each compound’s published thermal conductivity rating, tube size relative to per-application cost, included accessories, and brand track record in the PC building community.
Temperature difference estimates between compound tiers — such as the modest gap between MX-4 and MX-7, and the more measurable gap favoring Kryonaut under heavy sustained load — are based on the known, widely-documented behavior of these established compounds across the PC hardware community, not measurements run on this specific batch of tubes on our bench.
We weighted per-application value heavily for the ARCTIC comparisons specifically, since MX-4 and MX-7 share the same brand and application process, making tube size and price the clearest differentiators alongside conductivity rating.
For the BSFF listing, we noted the lack of independently verified performance data compared to ARCTIC and Thermal Grizzly’s established reputations, and factored that uncertainty into our overall recommendation rather than taking marketing claims at face value.
What to look for in thermal paste
Thermal conductivity rating and what it actually means
Thermal conductivity is measured in W/mK (watts per meter-kelvin) and indicates how efficiently a compound transfers heat from the CPU die to the cooler’s contact plate. Higher numbers are generally better, but the practical difference between a mid-range compound like MX-4 and a premium one like Kryonaut is usually smaller in real-world gaming use than the spec sheet gap suggests, since paste is just one link in a longer thermal chain that includes the cooler itself, case airflow, and ambient temperature.
Application method: dot versus spread
The pea-sized dot method, placing a small amount in the center of the CPU and letting cooler mounting pressure spread it, works well for the vast majority of modern consumer CPUs and is the method most manufacturers recommend by default. The spread method, using a spatula to manually apply an even thin layer, can be preferable for unusually large or irregularly shaped dies, like some workstation or HEDT CPUs, where mounting pressure alone might not spread the dot evenly to the edges.
Tube size and cost per application
As this roundup shows clearly with the MX-4 4g versus 8g comparison, larger tubes from the same product line often cost only marginally more while roughly doubling the number of applications, making bulk sizes the better value for anyone doing more than a single build. Premium pastes like Kryonaut, by contrast, are typically sold in small quantities specifically because their higher price point targets a single careful application rather than routine multi-build use.
Electrical conductivity and beginner safety
Both ARCTIC compounds in this roundup use non-conductive, non-corrosive formulas, meaning accidental contact with other motherboard components during application won’t cause a short circuit — an important safety consideration for first-time builders who might apply slightly too much or spread paste imprecisely. Some premium metal-based pastes on the broader market are electrically conductive and require much more careful application, though none of the compounds in this specific roundup fall into that category.
Paste consistency and ease of application
Consistency ranges from relatively thin and easy-to-spread compounds to thicker, more viscous pastes like Kryonaut that require more deliberate application technique. Thinner compounds are generally more forgiving for beginners, spreading more readily under cooler mounting pressure, while thicker premium compounds can offer marginally better performance for experienced builders willing to apply them more carefully.
Mistakes buyers make
Applying too much paste, assuming more will improve cooling. Excess paste can trap air bubbles at the edges and actually worsen thermal transfer rather than help it.
Buying a 1g premium tube expecting multiple future applications. Kryonaut’s small tube size is meant for one or two careful applications, not routine multi-build use like the larger ARCTIC tubes support.
Assuming premium paste delivers a dramatic temperature improvement on a stock-clocked gaming CPU. The real-world gap between MX-4 and Kryonaut is often just a few degrees for typical, non-overclocked builds.
Skipping the cleaning step when repasting. Old, dried paste residue left on the CPU or cooler contact plate can prevent even application of the new compound, undermining even a premium paste’s potential.
Not checking tube size against actual planned use. Paying for an 8g tube makes sense for multiple builds, but for a single application, the smaller tube sizes in this roundup avoid wasting unused paste past its usable shelf life.
Trusting unestablished brands without independently verified conductivity data, as with the BSFF listing in this roundup, over proven options like ARCTIC or Thermal Grizzly with long community track records.
Verdict
For the vast majority of gaming PC builds, ARCTIC MX-4 at $4.99 remains the strongest overall pick, offering proven, safe, beginner-friendly performance at a price that’s hard to beat. Buyers doing multiple builds or repastes should grab the 8g version with spatula for the best per-application value. Overclockers and enthusiasts running high-TDP CPUs under sustained heavy load should consider Thermal Grizzly Kryonaut, accepting its smaller tube size and premium price for measurably better conductivity where it matters most. For the cooling hardware this paste pairs with, see our CPU cooler for gaming and AIO liquid cooler roundups.
Frequently asked questions
How often should I reapply thermal paste?
Most quality pastes last 2-5 years before performance noticeably degrades, though budget or lower-quality compounds can dry out and lose effectiveness sooner, so if you notice climbing temperatures on an older build with no other changes, checking paste condition is a reasonable first step.
Does more expensive thermal paste actually perform better?
Not always in a straight line — ARCTIC’s MX-4 remains one of the best value options on the market despite costing a fraction of premium pastes like Thermal Grizzly Kryonaut, though Kryonaut’s higher thermal conductivity rating does translate to a measurable, if often small, temperature advantage in demanding overclocked scenarios.
How much thermal paste should I apply?
A pea-sized dot in the center of the CPU is the standard recommendation for most modern CPU sizes, since the mounting pressure from the cooler will spread it evenly across the die; using too much can actually trap air bubbles and hurt performance rather than help it.
Is Thermal Grizzly Kryonaut worth it over ARCTIC MX-4 for a gaming PC?
For a standard air-cooled or AIO-cooled gaming CPU at stock settings, the temperature difference between Kryonaut and MX-4 is typically small enough not to matter; Kryonaut earns its premium price more clearly for heavy overclocking or extreme cooling setups where every degree counts.
Do I need cleaning wipes to remove old thermal paste?
Isopropyl alcohol (90%+) and a lint-free cloth or coffee filter work well for removing old paste, and several products in this roundup include dedicated cleaning wipes or solution bundled in, which is convenient but not strictly necessary if you already have alcohol on hand. For the broader cooling setup this paste supports, see our case fans for airflow guide as well.
Related guides
- Best Reviews of Piano in 2026: Specs and Prices Compared: 8 Tested (2026)
- Best Ge Profile Opal Mini Nugget Ice Maker in 2026: Top Picks for Every Budget: 8 Tested (2026)
- Best Chocolate Gift Box in 2026: Specs and Prices Compared: 8 Tested (2026)
- Best Microwave Convection Oven in 2026: Top Picks for Every Budget: 8 Tested (2026)
