Best 240Mm AIO Coolers of 2026

ARCTIC attacks the hot-CPU problem with hardware instead of fan speed. The radiator is 2.6 inches deep — the thickest in this group — the cold plate is offset toward the CPU hotspot on both Intel and AMD boards, and a small PWM fan sits on the pump housing to blow air across the voltage converters around the socket. The fan leads even run inside the hose sleeving, so one cable reaches the motherboard.

For a chip that actually loads the cooler, that combination earns its keep. This is the pick here when the CPU is the warmest thing in the room, and the six-year warranty is the longest stated on this page.

Two things to check before committing. At 2.6 inches plus fans, the radiator needs a case with real depth, and a top mount in a compact mid-tower is where that runs out first. Mounting asks for patience too: the offset plate and bracket have to line up exactly, and the tolerances are tight enough that it is easy to cross-thread a screw if you rush.

Noise depends on where you set the curve. The P12 PRO fans are civil at low and mid speeds and become the loudest thing in the case once they pass roughly half speed, so a curve that stays gentle until the CPU is genuinely hot keeps this one quiet without costing you much.

No cooler here has been in service longer, and that history is the whole argument. The ML240L RGB V2 turns up in build after build, and the reason is unglamorous: a third-generation dual-chamber pump that has been refined rather than redesigned, SickleFlow fans that push 62 CFM at up to 1,800 RPM, and an EPDM seal that speaks to year three more than day one.

Cooling is the part that holds up. A 240mm radiator with those fans is enough for a mainstream chip at stock, and the money went into the pump and the seal rather than a screen.

The rear bracket is the weak point. It has to be held against the back of the board while you line up the standoffs, and it doesn't seat itself, so plan on a second pair of hands or a magnetic screwdriver and check the orientation twice before tightening anything down. Once it is on, it is on.

Lighting is where the value math gets muddier: the fan LEDs and the pump ring don't render the same color from the same setting, so a single-color build looks far better than a rainbow one. Cover runs two years, the shortest figure stated on this page, which matters if you keep a cooler across two builds.

A fill port on a sealed cooler is rare enough to lead with. Unscrew the cap on the Pure Loop 3 and you can top up the coolant — the part that slowly leaves any loop over years of heat cycles. It doesn't make the cooler immortal, but it turns a replacement into a five-minute job.

The rest of the design follows the same brief. Two Pure Wings 3 120mm fans daisy-chain onto a single header, the six-pole three-phase pump motor is built for smooth rotation rather than a headline RPM figure, and the tubing is flexible enough to route behind a motherboard tray without a fight. Nothing here lights up.

This is the cooler we recommend when the machine is a work tool rather than a display piece. The pump is effectively inaudible at its default curve, and the fans' 2,100 RPM ceiling means the cooler ramps gently instead of stepping in and out of earshot. If you sit next to your PC all day, that is worth more than another 200 RPM of headroom.

The trade is money and nothing else. You pay more than most of this group and get no lighting, no display and no software, because the budget went into the pump, the fans and that port. If any of those three is what you came for, look elsewhere on this page.

Two fans, one cable, one header. The Nautilus 240 RS daisy-chains its RS120 fans together and runs a single 4-pin lead to the motherboard, so there is no hub to find a home for and no RGB cable to hide. In a case with a glass panel, that absence is the feature.

This is the pick for a build where the inside is meant to look deliberate. The cold plate is slightly convex, which helps it sit flat against the CPU's heat spreader, and the paste arrives pre-applied in a pattern meant to spread evenly under pressure — small things that matter when you install once and close the case for two years.

Cooling holds up without drama: a 240mm radiator and a pair of high-static-pressure fans keep a loaded CPU in range, and the pump is rated at 20 dBA while it does it. Five years of cover sits near the top of this group.

The fans are plain RS120s with no lighting at all, which is exactly right for a blacked-out build and the wrong call for a showcase one.

Some builds sit eighteen inches from your ear, and that changes what you want from a cooler. The MAG Coreliquid A13 240 is built for that spot: a pump that runs to 3,800 RPM on ceramic bearings, a split-flow radiator that spreads coolant across the channels instead of pushing it straight through, and fan behaviour that keeps the machine unobtrusive at idle.

Build quality is where it overdelivers for the money. The tubing is triple-layered under a reinforced mesh sheath, the pump housing feels solid rather than hollow, and the bracket covers AM5, AM4 and LGA1700, with LGA1851 supported out of the box — not a given at this end of the range.

What we keep coming back to is how little there is to think about. One bracket design handles both AMD and Intel, thermal paste is in the box, and there is no controller or software layer to install. Three years of cover is a reasonable middle ground at this price.

Two things to check. The tubing runs 390mm, which is short for a 240mm radiator front-mounted in a full tower — measure the run from the socket to the front panel before you commit. And the Intel socket list stops at LGA1700 and LGA1851, so an older LGA1200 board is not covered.

White components are the harder half of a themed build to source, and this is the only cooler here that commits to it all the way: white radiator, white fans, white pump housing, with a translucent dome over the water chamber that catches the ARGB instead of hiding it.

The lighting is the reason to choose it over the MasterLiquid. The dome diffuses the LEDs into one soft glow rather than the hard ring of dots you get from a flat pump top, and because the pump carries the effect, the fans only need to be set to plain white.

Underneath the lighting it is a standard 240mm cooler, and that is fine. A dual-chamber pump, an EPDM seal, widened radiator channels and two 2,100 RPM fans pushing 84 CFM will handle a mainstream CPU at stock without complaint. Cooling is not the reason to buy it and not the reason to skip it.

The fans do get loud once they are working hard, so this is a cooler you buy for the look rather than for a near-silent overclocked build. Pre-installed fans and three years of cover round out a package that is easy to live with and easier to look at.

The fans are the interesting part. Two 120mm units rated at 82.5 CFM and 2.55 mmH2O of static pressure — and on a radiator the pressure figure matters more than the airflow one, because fins are a restriction and a fan that stalls against them moves less air than its CFM number suggests. These are specified not to stall.

The all-black layout is the reason it is here, though. No lighting on the pump, no lighting on the fans, and a CD-pattern cover on the block that reads as machined metal rather than plastic. In a windowed case with nothing else lit, it disappears the way a good component should.

Installation is simpler than the price suggests. The fans daisy-chain to each other so you are not hunting for a second header, the pump runs at 2,900 RPM, and the mounting hardware covers AM5, AM4, LGA1700 and LGA1851 — the current sockets, which is what you want from a budget part. ID-COOLING also rates it for 300W, an ambitious figure for a 240mm radiator that the fan choice at least makes plausible.

The catch is noise at the top end. High-pressure fans have to spin to do their job, and this cooler gets loud when the CPU stays hot. For a machine that idles most of the day it never comes up. For a render box in a shared room, it will.