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Arctic Liquid Freezer 240 AIO CPU Cooler Review


All temperature charts are sorted with lowest load temperatures at the top.



As you can see, the Arctic Liquid Freezer shot to the top of both our cooling charts. That’s right – it out-performs both the Corsair H100i V2 and the Thermaltake Water 3.0 240 RGB units, despite it costing over £30 less than both those coolers.

Clearly, having a thicker radiator pays dividends. I also think, though I could not find official specifications online, the Liquid Freezer has a high fins-per-inch (FPI) density. This means it needs extra fan-power to push air through, but there is extra surface area to maximise cooling performance.

Four fans configured in push/pull is more than enough to get air through the radiator, too. The bottom line is, though, the Liquid Freezer 240 is an exceptional performer for the money.

Noise output

Like nearly all the coolers I have tested, the fans spin at a very low rpm when the system is idling, meaning it is not audible above ambient noise. The pump does whine a little bit, but I test using an open-air test bench which is right next to me. I am certain the pump noise would be eliminated when positioned inside a chassis, as it is hardly noisy in the first place.

Thanks to the four fans, even under load, the Liquid Freezer does not get too loud. This is because having two fans pushing air, and another two fans pulling air out of the radiator, means the four fans do not have to spin very fast to achieve the same results that two fans would. It seems contradictory and almost illogical, but having four fans makes the cooler quieter than if it only had two fans.

That said, the fans are still audible, but they are by no means intrusive. They also ramp up reasonably slowly, meaning they do not suddenly become very loud. This helps the noise from catching your attention and becoming a distraction.

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  • Robert Gibson

    How many watts does the test PC and/or CPU consume at 4.5 GHz under load?

  • Dominic Moass

    Good question Rob. Next time I get a cooler in for review I will find out and get back to you. I don’t use a GPU, so I can’t imagine much more than 200W – maybe 250.

  • moto hellogoto

    Wow this sounds great. I just hope I can get all 4 fans to fit into my case!

  • Kunninglinguist

    If it doesn’t fit in your case just put two fans outside and then the radiator and 2 fans inside the case

    Also, be sure to have then sucking cooler air from outside rather than the other way around and then fit removable mesh filters to the intakes to cut down on dust being sucked in, this also creates positive pressure in the case so you don’t have to worry about dust being sucked in through every gap and vent hole the case has

    If you want to take it a step further get some Perspex or plastic and create a wind tunnel to the rear exhaust fan at the back on most cases. This works like a PSU then taking cooler air from outside but not allowing it once its taken heat from the radiator into the main volume of the case itself as its instantly vented straight out of the back. Modern PSU/case combos do this too by the PSU sucking air through a (normally dust filtered) hole on the bottom and venting straight out of the back. You can even forgo the rear exhaust fan if you want as with 4 fans already sucking the air in I doubt a 5th one at the rear would do much and could be forced to spin faster than it wants by the airflow from the cooler anyway

    If you do that however make sure to compensate for the main volume of the cases air flow though by using all other available fan locations as intakes

    With a bit of imagination and not that much extra work you can get some excellent results and temps. I’ve been doing it this way for well over 2 decades on desktops and servers, and have even done similar with air coolers using a duct from one intake fan to the intake (push) on an air cooler then another duct from the exhaust (pull) fan on the cooler to an exhaust fan on the case. This makes even the relatively cheap evo 212 work amazingly well especially if you swap out the fans for something like corsair or arctic fans (2z92mm on the cooler and 2×120/140mm as the case intake and exhaust)

  • I really don’t find a 15 minutes stress test enough for an AIO cooler. Water temperatures don’t equalize in such short time. You should leave it at least 45 minutes under stress to get an accurate measurement. I consider these results invalid.