ARCTIC Liquid Freezer III Pro 240 review

The Liquid Freezer III Pro 240 is a 240 mm all-in-one liquid cooler from ARCTIC, released in 2025. It supports Intel LGA1851 and LGA1700, plus AMD AM5 and AM4. Two P12 Pro fans come pre-installed, and the cold plate arrives with MX-6 thermal compound already applied.

That makes it a straightforward option for an Intel or AMD build where you want liquid cooling and a 240 mm radiator.

Cooling is the main reason to look at it. Tom's Hardware calls it the strongest AIO it has tested. The cold plate is copper with micro-skived fins, and the radiator is 38 mm thick. ARCTIC says that thickness holds more liquid than conventional 27 mm radiators.

Owner reports point the same way. One says games no longer go above 70°C with it fitted. Another says it easily handles Ryzen 7/9 or Intel i7/i9 chips under sustained load. Those are only two owners, but they match the reviewer's conclusion. With a top ranking from the reviewer and consistent owner praise, it looks well suited to high-end CPUs that run hot under long loads.

The noise picture is good, with one caveat. At a noise-normalised 38.9 dBA, the reviewer says it ties for the best results seen from any AIO yet. At full fan speed it reached 52.6 dBA. With a 150 W CPU and 290 W GPU load running, it reached 43.8 dBA.

The fans run from 600 to 3000 rpm, so there is a wide range to work with. The pump runs from 800 to 2800 rpm, and the reviewer says it can be a little louder than some users may prefer at full speed. Owner feedback is mixed. One calls it good but nothing more on noise, and another says it is a little noisy when the PC is close by. If your PC sits on the desk near you, the pump and fan speeds are worth keeping in mind.

The socket list covers Intel LGA1851 and LGA1700, plus AMD AM5 and AM4. The radiator measures 277 × 120 × 38 mm. The tubing is 450 mm long, with a 12.4 mm outer and 6.0 mm inner diameter.

The thickness is the thing to check. One owner warns that the radiator is thick and that you must confirm there is space in your case. Because the radiator is 38 mm thick, it is worth measuring where it will mount before ordering.

The package is set up to reduce fiddly work. The fans are pre-installed and the 0.8 g of MX-6 compound is already on the cold plate, so there is no separate paste to buy or apply. The P12 Pro fans use a fluid dynamic bearing and 4-pin PWM control. The kit also includes a VRM fan, rated at 400 to 2500 rpm.

ARCTIC backs the cooler with a 6-year warranty. That is a point in its favour for a part that contains a pump and liquid.

The reviewer calls the manufacturer's suggested retail price very reasonable. Combined with a top cooling result and the included fans and paste, that price verdict counts in its favour. The trade-offs are the pump noise at full speed and the case clearance check, not the cost.

It suits builders with a hot CPU who want strong cooling and a case with room for a 38 mm radiator. It also suits anyone who wants the paste and fans sorted from the start. If you are sensitive to pump noise at high speed, plan to manage the speeds rather than run it flat out.