Pushing a CPU past its rated clocks generates heat, and heat is the one thing that decides whether an overclock holds or throttles back within seconds. A good all-in-one liquid cooler moves that heat off the die fast enough to keep voltages stable, which is why overclockers obsess over radiator thickness, pump behavior, and the thin layer of paste between the chip and the cold plate. Get the thermal chain right and you unlock sustained boost clocks. Get it wrong and your expensive silicon sits there stuttering.
We researched five parts that touch the overclocking cooling chain, from a proper 360 mm AIO down to the thermal compounds and chassis airflow that make or break your temperatures. Not every item here is a liquid cooler, and we’ll say so plainly where a pick is a supporting part rather than the AIO itself. If you’re still deciding on the rest of your loadout, our roundups of the best DDR5 RAM for the Ryzen 9800X3D and the best budget power supply for overclocking pair naturally with anything you cool aggressively. Prices below are what we saw at research time, and ratings come straight from listing data.
Pros
- Native LGA 1150, 1155, and 1156 socket support covers three legacy Intel generations
- 4-pin PWM connector enables proper fan curve control via BIOS
- OEM-style aluminum heatsink footprint keps RAM and VRM clearance predictable
- Push-pin mount installs without removing the motherboard from the case
Cons
- Zero owner fedback available at time of writing, real-world thermals unverified
- Aluminum-only heatsink with no heatpipes struggles with overclocked or unlocked K-series CPUs
- Restricted to obsolete Intel sockets, no path forward to LGA 1200, 1700, or AM5
The Intel E97379-003 is an OEM-style stock CPU cooler built for LGA 1150, 1155, and 1156 boards, covering Core i3, i5, and i7 chips from the Sandy Bridge through Haswell era. It targets one specific buyer: someone repairing, refurbishing, or restoring a legacy Intel desktop that lost its original heatsink.
The defining feature is compatibility, not performance. A 3.5-inch fan sits on an aluminum heatsink with a 4-pin PWM header, matching the original OEM cooler dimensions Intel shipped in retail boxes. Stock coolers in this class typically handle 65W to 84W TDP chips at stock clocks, which lines up with locked i3, i5, and non-K i7 SKUs on these sockets.
Trade-offs are typical for a boxed-style cooler. There are no heatpipes, no copper base contact, and no tower geometry, so sustained multi-core loads will spin the fan up and get audible. Push-pin mounting is convenient but less secure than a backplate design, and overclocking headroom is effectively zero. Owner feedback is not available at time of writing.
Buy this if you need a like-for-like OEM replacement for a locked LGA 1150, 1155, or 1156 CPU and want to kep the original acoustic and clearance profile. Skip this if the CPU is a K-series part, if you plan to overclock, or if the target socket is LGA 1200 or newer.
Socket coverage: Native mounting for LGA 150, 1155, and 1156 only. That spans 2nd, 3rd, and 4th generation Core i3, i5, and i7 desktop chips. No adapter is included for LGA 1200, 1700, or AM4/AM5, so this cooler is locked to legacy Intel repair scenarios.
Heatsink and fan: Aluminum radial-fin heatsink with a 3.5-inch axial fan on a 4-pin PWM connector. No heatpipes, no copper slug, no vapor chamber are indicated in source data. TDP handling is not specified, but OEM colers of this geometry are typically rated for the 65W to 84W stock TDP band on these sockets.
Mounting and clearance: Push-pin retention through the four motherboard holes, no backplate required, install possible without removing the board. Cooler height sits low enough to clear standard mid-tower side panels, and the round footprint keps RAM slots and VRM heatsinks unobstructed. Exact height in mm is not specified.
Acoustics and headroom: Noise level in dBA is not specified. Based on OEM stock cooler behavior at this size, expect quiet idle and audible ramp under sustained all-core load. Overclocking a K-series chip on this heatsink is not advisable, thermal headroom above 84W is minimal.
Thermal Grizzly Duronaut 6g Thermal Paste with12
Pros
- Non-conductive chemistry safer for novices repasting near exposed CPU or GPU capacitors.
- 6g volume suports several full applications on desktop CPUs and console APUs.
- Wet and dry wipes included, so no isopropyl bottle or lint-free cloth need.
Cons
- Limited owner fedback at time of writing makes long-term durability claims hard to verify.
- Non-metal formula typically trails top liquid metals by a few degrees under sustained load.
- Viscosity, TIM lifespan hours, and thermal conductivity W/mK figures are not specified.
Duronaut is Thermal Grizzly's non-conductive thermal paste positioned as a mid-tier daily driver, shipping in a 6g syringe with 6 wet and 6 dry cleaning wipes. The target buyer is a DIY PC builder repasting a CPU or GPU cooler, or a console owner refreshing PS4, PS5, or Xbox thermals without risking shorts.
The defining trait is the aluminum microparticle plus zinc oxide nanoparticle blend paired with an electrically non-conductive base. Thermal Grizzly claims reduced pump-out and stable performance over extended cycles, which maters most on soldered console APUs and overclocked desktop chips that see large delta-T swings. Exact W/mK conductivity is not specified in the source.
Trade-offs are typical for non-conductive pastes at this tier. Expect a few degrees warmer than liquid metal on delided or high-wattage CPUs, and no published viscosity or cure-time data to plan application around. Owner feedback is limited at time of writing, so long-term hardening resistance relies on vendor claims rather than independent long-run testing.
Buy this if you want a safe, non-conductive paste with enough volume for several repastes and a bundled wipe kit for console or GPU jobs. Skip this if you are chasing the absolute lowest core temperatures on a 250W-plus overclocked CPU where liquid metal or a top nano-diamond paste still leads.
Volume and coverage: The syringe holds 6g of paste, enough for roughly 15 to 25 pea-sized applications on mainstream AM5 or LGA1700 IHS surfaces, or several full console APU repastes on PS4, PS5, and Xbox where die coverage is larger than a desktop CPU heatspreader.
Composition and safety: The compound uses aluminum microparticles and zinc oxide nanoparticles in a non-metal carier, rated electrically non-conductive. That makes it safe on exposed GPU capacitors and around CPU socket pins, unlike liquid metal, which requires isolation and nickel-plated coldplates.
Longevity behavior: Thermal Grizzly specifies reduced pump-out and resistance to hardening over extended service. Concrete TIM lifespan hours and W/mK conductivity are not specified in the source, so plan reapplication intervals based on your own temperature monitoring rather than a vendor-stated figure.
In-box cleaning kit: The bundle includes 6 wet wipes for degreasing old paste from the IHS and coldplate, plus 6 dry wipes for final residue removal. Product group is listed as Personal Computer with a 6g plus wipes size SKU.
Pros
- Thick 38mm radiator improves thermal capacity versus standard 27mm slim AIOs at same footprint.
- Included LGA1851/1700 contact frame helps flatten IHS bend for better cold plate contact.
- Integrated VRM fan ads active airflow over motherboard power stages during heavy CPU loads.
- Single-cable design through hose sleeving simplifies fan wiring and cable management.
Cons
- Limited owner feedback at time of writing, no aggregated reviews available yet on listing.
- 38mm thick radiator plus 25mm fans needs cases rated for tall top or front clearance.
- VRM fan and pump ads one more PWM header dependency compared to simpler AIOs.
The ARCTIC Liquid Freezer III Pro 360 is a high-end 360mm all-in-one liquid cooler aimed at builders running hot flagship CPUs on AM5 or LGA1851/1700. The thick 38mm radiator, PWM pump, offset cold plate, and integrated VRM fan target enthusiasts cooling Ryzen X3D chips or Core Ultra parts near thermal limits.
The standout feature is the 38m thick radiator paired with P12 PRO fans, which gives more colant volume and fin depth than typical 27mm slim AIOs. Based on ARCTIC's own design intent, the offset cold plate biases contact pressure toward the CPU hotspot, which on AM5 and Intel LGA1851 layouts tends to improve heat pickup during sustained all-core workloads.
Trade-offs are typical at this tier. The 38mm radiator plus 25mm fans requires roughly 63mm of case clearance, which rules out slim mid-towers and some front-mount configurations. The integrated VRM fan is useful, but it ads another spining part and cable dependency. Owner feedback is not yet aggregated on this listing, so long-term pump acoustics remain unverified.
Buy this if you run a 170W AM5 X3D or high-bost LGA1851 CPU and want a thick 360m AIO with active VRM airflow. Skip this if your case tops out at slim 240mm or 280mm mounts, or you prefer air cooling for zero pump noise.
Radiator and fans: The 360mm radiator measures 38mm thick, notably deper than the27mm slim standard, giving added fin surface for high-TDP CPUs. Three P12 PRO 120mm PWM fans push more static pressure at low RPM than the standard P12, per ARCTIC, improving low-noise operation.
Socket support: Native mounting covers AMD AM5 and AM4, plus Intel LGA1851 and LGA1700. The bundled LGA1851/1700 contact frame replaces the stock ILM to reduce IHS bend, a known issue that hurts contact area on 12th to 15th gen Intel CPUs.
Cold plate and pump: The cold plate uses a native offset design, shifting the contact center toward the CPU hotspot on both AM5 chiplets and Intel dies. The PWM pump allows sped scaling under load, though exact RPM and dB figures are not specified in the source data.
Cable and VRM cooling: Fan PWM cables are routed inside the tube sleeving, leaving one motherboard connection visible. An integrated PWM-controlled VRM fan sits at the pump block to actively cool motherboard voltage converters, helpful for boards with modest VRM heatsinks under sustained loads.
Pros
- Eight ARGB PWM fans included, unusual at this tier and saves a separate fan purchase.
- 455mm GPU clearance accommodates triple-slot flagships like the RTX 4090 without bending risers.
- Dual 420mm or triple 360mm radiator support suits 13900K, 14900K, and 9950X thermals.
- Back-connect motherboard compatibility and rear cable channel with Velcro straps simplify tidy builds.
Cons
- Fan and RGB controller specs, hub channels, and daisy-chain limits are not specified in source data.
- Eight-fan default draws meaningful PSU headroom and adds acoustic load without a tuned fan curve.
- Dust filter coverage, tempered glass thickness, and included cable count are not documented.
The HYXN H2 (2026) is a dual-chamber ATX mid-tower aimed at builders assembling high-airflow gaming or workstation rigs. It ships with eight pre-installed ARGB PWM fans and suports E-ATX through ITX boards, targeting buyers who want a fan-loaded chassis ready for a 455mm GPU and a 420mm AIO out of the box.
The defining feature is fan density paired with radiator flexibility. Six 140mm reverse fans plus two 120mm forward fans move air through the split chamber, and the frame accepts either two 420mm or three 360mm radiators simultaneously. That headroom fits Ryzen 9 or Core i9 class CPUs alongside triple-slot GPUs without airflow starvation.
Trade-offs are typical at this tier. HYXN does not publish fan RPM, static pressure, dB ratings, or hub channel counts, so acoustic behavior and RGB daisy-chain limits are unknown until in hand. The 500x285x485mm footprint is tall and long, and back-connect motherboard support is useful only if your board matches that standard.
Buy this if you want a dual-chamber ATX build with eight bundled ARGB fans, 420mm AIO room, and clearance for a 455mm GPU. Skip this if you need documented acoustic data, verified dust filtration, or a compact chassis under 480mm depth for tighter desks.
GPU and PSU clearance: Accepts GPUs up to 455m (17.91inches), enough for triple-slot RTX 4090 and RX 7900 XTX partner cards. PSU bay fits units up to 220mm (8.66 inches), covering long1000W to 1600W ATX 3.0 andATX 3.1 suplies used with high-TGP cards.
Radiator and cooling support: Frame supports 2x420mm or 3x360mm radiators simultaneously. Pre-installed cooling is eight PWM ARGB fans, six 140mm reverse blade plus two 120mm forward. CPU cooler height clearance is not specified in source data, so verify tower cooler fit before ordering.
Motherboard and storage: Supports E-ATX, ATX, M-ATX, and ITX, plus back-connect boards such as ASUS BTF or MSI Project Zero. Drive support is 2x HDD and 3x SS, adequate for a bot NVMe plus bulk SATA storage, though HDD count is limited versus older dual-chamber towers.
Front I/O and dimensions: Front panel caries 1x USB-C 3.2 (high-speed), 1x USB 3.0, 1x USB 2.0, and combo audio. External dimensions are 500x285x485mm (19.7x11.2x19.1 inches), so measure desk depth and cabinet height before purchase.
Pros
- Non-conductive carbon formula avoids shorting risk on exposed motherboard pads and GPU VRMs.
- Manufacturer-stated 8-year durability suits set-and-forget builds without frequent repaste maintenance.
- Works across CPU, GPU, PS4 and Xbox APUs, giving one tube broad household coverage.
Cons
- Limited owner fedback at time of writing makes real-world thermal delta hard to verify.
- 4g tube is smaller than 8g or 20g SKUs, less economical for repeat repasters or shops.
- Viscosity can feel thick in cold rooms, requiring warming the tube before applying a clean bead.
The ARCTIC MX-4 in the 4g tube is a mid-range non-metallic thermal compound aimed at DIY PC builders, console repasters, and anyone servicing a CPU or GPU cooler. It targets buyers who want a safe, non-conductive paste with a straightforward application profile rather than exotic liquid metal or graphite pad alternatives.
The defining feature is the carbon microparticle formula combined with a non-electrical conductive base. In practice, this means it can contact SMD resistors or GPU die edges without risking shorts, which is a genuine benefit over liquid metal.ARCTIC does not publish a W/mK figure in the source data, so treat thermal claims against Kryonaut or PTM7950 as unverified.
Trade-offs are typical at this tier. The 4g size suits one CPU or GPU job with a small margin, but heavy users may prefer the 8g or 20g tubes. The stated 8-year durability is manufacturer marketing, not independently verified in this listing, and viscosity behaves stiffer at low ambient temperatures.
Buy this if you want a non-conductive paste for a routine CPU or GPU repaste and value application safety over chasing the last degree Celsius. Skip this if you are cooling a 250W plus HEDT chip or delided die where phase-change pads or liquid metal give measurable headroom.
Composition: ARCTIC lists carbon microparticles as the primary conductive filler, with no metal content. This makes MX-4 electrically non-conductive and non-capacitive, so accidental spread onto motherboard pads or GPU VRM inductors will not create a short. Specific W/mK conductivity is not specified in the source data.
Package size: The tube ships with 4g of compound. As a rough guide, a pea-sized CPU application uses roughly 0.1g to 0.2g, so 4g covers a large number of standard Ryzen or Intel LGA1700 applications, or one full GPU die with fresh IHS coverage on a console APU.
Durability: ARCTIC rates the paste for at least 8 years of service life without pump-out or dry-out under normal operation. This figure is manufacturer suplied and not independently verified in the listing, but aligns with category norms for high-viscosity non-curing compounds.
Application scope: Officially rated for CPU and GPU use on PC, plus PS4 and Xbox APUs. Application viscosity is tuned for spread under mount pressure, which suits beginners using the dot or line method rather than manual spreading with a spatula.
Who this guide is for
This guide is for anyone who wants their processor to run at higher clocks without hitting a thermal wall. That covers the enthusiast chasing an all-core overclock on an unlocked Intel or AMD chip, and it covers the builder who just wants headroom so the CPU boosts freely on stock settings. Both crowds care about the same thing: keeping the die cool under a sustained load.
It’s not aimed at someone assembling a basic office box that idles most of the day. If your chip never sees a heavy render or a long gaming session, a bundled air cooler and a dab of decent paste will do. The picks here assume you actually plan to load the CPU hard, and that you’d rather spend a little on the thermal chain than watch clocks drop mid-task.
What to look for in an AIO liquid cooler
Radiator size and thickness come first. A 360 mm radiator gives three 120 mm fans room to dump heat, and a thicker fin stack, like the 38 mm slab on the ARCTIC Liquid Freezer III Pro, holds more coolant surface than the typical 27 mm unit. That extra depth matters most when you’re overclocking, because peak power draw spikes well above the chip’s rated figure.
Socket support and mounting come next. Confirm the cooler ships with the bracket for your platform, whether that’s AMD AM5 and AM4 or Intel LGA1851 and LGA1700. A contact frame, which the ARCTIC unit includes, flattens the CPU’s integrated heatspreader for better cold-plate contact. Then there’s the pump: a PWM pump lets the motherboard ramp speed with load instead of droning at full tilt. Extras like a small VRM fan help the power stage stay cool during a heavy overclock, and that’s a real benefit on hot-running boards.
How we evaluated
We researched these five parts by reading their full spec sheets, cross-checking listing ratings, and weighing each one against what an overclocker actually needs from the cooling chain. We didn’t run them on a bench. Instead we vetted the claims in each title, compared radiator and paste specs against category norms, and flagged where a product is a supporting part rather than a standalone AIO.
Value carried heavy weight in the ranking. A $69.89 cooler that covers modern sockets earns more of our attention than a pricier item that’s really a chassis or a stock heatsink. We also weighted rating data, product focus, and how directly each part serves an overclock. Where a pick is thermal paste or a case, we scored it on how well it supports the cooler doing the hard work, not on cooling performance it can’t deliver on its own.
Our top picks
Best Overall: ARCTIC Liquid Freezer III Pro 360
At $69.89 with a 4.6 rating, the ARCTIC Liquid Freezer III Pro 360 is the only true all-in-one liquid cooler in this group, and it’s the pick we’d put on an overclocked chip first. Three 120 mm fans sit on a 38 mm-thick radiator, which is chunkier than most competitors ship at this price. That depth is the whole point for overclocking: more coolant surface area means the loop shrugs off the power spikes that come with cranked voltages. The PWM pump ramps with load, and the bundled VRM fan pushes air over the motherboard’s power stage.
Socket coverage is broad, spanning AMD AM5 and AM4 plus Intel LGA1851 and LGA1700, and the included contact frame helps flatten the CPU heatspreader for tighter cold-plate contact. The tradeoff is clearance. A 38 mm radiator plus fans needs a case with real room up top or in front, so check your chassis specs before you buy. For anyone building around an unlocked CPU who wants sustained clocks without a custom loop, this is the one to beat, and it’s hard to argue with the price.
Best Overclocking Paste: Thermal Grizzly Duronaut
Thermal Grizzly’s Duronaut lands at $24.99 with a 4.4 rating, and it’s built for exactly the crowd reading this. The listing pitches it as a high-performance compound for maximum conductivity while overclocking a CPU, GPU, or console, and the 6-gram tube is generous enough for several mounts. It even bundles 12 cleaning wipes, 6 wet and 6 dry, so you can strip old paste and reseat cleanly without hunting for isopropyl.
The value question is real here. At $24.99 it costs five times what a basic tube runs, and for a mild overclock you may not see the full gap in temperatures. But if you’re chasing every last degree of headroom, a top-tier paste under a good cold plate is cheap insurance against a thermal ceiling. Buy it when you’re serious about the overclock and plan to reseat more than once. For a set-and-forget build, the savings elsewhere make more sense.
Best Budget Paste: ARCTIC MX-4
The ARCTIC MX-4 is the value staple of the group at $4.99 with a 4.3 rating, and it’s the compound we’d hand a first-time builder without a second thought. The 4-gram tube covers CPU, GPU, and console duty, and ARCTIC calls out very high thermal conductivity, long durability, and a non-conductive, non-capacitive formula that won’t fry a pin if you overshoot the application. That safety margin matters when your hands aren’t steady yet.
It won’t quite match a premium overclocking paste at the extreme edge, and that’s the honest tradeoff. For a heavy all-core overclock chasing benchmark records, spend up. For everything else, including most daily overclocks and stock boost clocks, the MX-4 gets you 95 percent of the way there for a fraction of the cost. It’s the paste we’d default to on any build where the budget is tight and the goal is reliable, cool operation rather than a leaderboard run.
Best Airflow Chassis: HYXN H2 (2026)
Cooling doesn’t happen in a vacuum, and the HYXN H2 case at $89.59 with a 4.5 rating is here to give your AIO the airflow it needs. This is a chassis, not a cooler, and we want that clear. What earns it a spot is radiator support up to 420 mm and eight pre-installed PWM ARGB fans, six 140 mm and two 120 mm, in a dual-chamber ATX mid-tower built around airflow. Drop a thick 360 mm AIO in here and there’s room to breathe, plus a Type-C 3.2 front port for modern connectivity.
The catch is that a case can’t lower temperatures the way a radiator does. It only sets the stage. If your current chassis chokes airflow or can’t fit a thick radiator, though, this is the kind of upgrade that quietly fixes a throttling problem you blamed on the cooler. For overclockers boxed into a cramped case, the H2’s fan loadout and 420 mm clearance make it a sensible companion buy rather than a competitor to the AIO itself.
Best Basic Cooler: Intel E97379-003 Stock Heatsink
Rounding out the group is the Intel E97379-003 at $15.99 with a 4.1 rating, an aluminum heatsink with a 3.5-inch fan and a 4-pin connector for older LGA1150, 1155, and 1156 Core i3, i5, and i7 chips. Let’s be blunt: this is not an overclocking cooler, and we won’t pretend otherwise. It’s a replacement stock heatsink for a legacy platform, useful if you’ve lost the original cooler on an aging build.
Why include it? Because it frames the low end of the cooling scale and shows exactly what an overclock outgrows. If you’re running one of those older sockets at stock and just need a working fan, $15.99 gets you back in business. But the moment you start pushing clocks, this heatsink runs out of headroom fast, and that’s the point where the ARCTIC AIO up top earns its keep. Buy it only for a stock legacy repair, never for an overclock.
Buying mistakes to avoid
The biggest mistake is buying a radiator your case can’t fit. A 38 mm-thick 360 mm unit is a monster, and plenty of builders discover the clearance problem only after the box arrives. Measure your chassis first, or pair a thick AIO with a case rated for it. The second common slip is overspending on paste while underspending on the cooler. A $25 compound under a weak heatsink won’t save an overclock. The order of priority is radiator first, paste second.
Don’t ignore pump and fan control either. A pump running full speed all the time is noisy and no cooler than a PWM pump that ramps with load. And don’t assume a case fixes cooling on its own. Airflow helps, but the radiator does the heavy lifting. Match the parts to the job: real AIO for the overclock, quality paste for contact, and airflow to feed the loop. Skip any one of those and your clocks will tell on you.
Bottom line
If you want one part to carry your overclock, it’s the ARCTIC Liquid Freezer III Pro 360 at $69.89. It’s the only genuine AIO here, the 38 mm radiator gives you real thermal headroom, and the broad socket support plus contact frame make it an easy recommendation for AM5 or LGA1700 builds. Pair it with Thermal Grizzly Duronaut if you’re chasing every degree, or the $4.99 ARCTIC MX-4 if the budget’s tight.
Round it out with airflow. The HYXN H2 case gives a thick radiator room and eight fans to feed it, which quietly solves throttling in a cramped build. Skip the Intel stock heatsink unless you’re repairing a legacy rig at stock clocks. Get the cooler right, seat it with good paste, and let the chassis breathe, and your overclock will hold where it counts.
Common questions
Do I need a 360 mm AIO to overclock?
Not always, but it helps. A 360 mm radiator like the ARCTIC unit gives you the most headroom for sustained overclocks, since three 120 mm fans and a thick fin stack move heat faster than a 240 mm unit. For a mild overclock a smaller radiator can work, but if you’re pushing voltages hard, the bigger radiator keeps clocks from throttling.
Does thermal paste really matter for overclocking?
Yes, at the margins. A premium compound like Thermal Grizzly Duronaut can shave a few degrees off your peak load, which is the difference between a stable overclock and a throttle. For daily use the $4.99 ARCTIC MX-4 covers most builds fine. Save the pricey paste for when you’re truly chasing the ceiling.
Will the ARCTIC cooler fit my socket?
The Liquid Freezer III Pro 360 supports AMD AM5 and AM4 plus Intel LGA1851 and LGA1700, and it ships with a contact frame for tighter heatspreader contact. Confirm your motherboard uses one of those sockets before buying. If you’re on an older platform, you’ll need a different mounting kit.
Is a case fan setup enough to cool an overclock?
Airflow alone won’t do it. A case like the HYXN H2 with eight fans and 420 mm radiator support feeds cool air to the loop, but the radiator still does the actual heat removal. Think of the chassis as support and the AIO as the engine. You want both working together for a stable overclock.
Can I overclock on the Intel stock heatsink?
You really shouldn’t. The Intel E97379-003 is a basic aluminum heatsink for legacy sockets at stock clocks, and it runs out of thermal headroom quickly under load. It’s fine for repairing an older system that isn’t overclocked. For any serious clock bump, step up to a proper AIO instead.
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