Cooler Master CoolerMaster WAK MasterLiquid 240 Atmos Stealth
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Product details
MasterLiquid ATMOS Stealth Series
360 degrees of cool
Cooler Master unveils the next generation of liquid cooling engineering with the MasterLiquid ATMOS Stealth Series, our new AIO liquid cooler. With the ATMOS series, we are introducing a multitude of modern designs and features. Our signature dual chamber pump has been refined for enhanced cooling synergy.
The latest Mobius 120 black fans are included to silently improve airflow and are preinstalled to simplify installation and the overall user experience.
The pump cover is manufactured from eco-friendly recycled plastics and features a transparent, removable top cover that allows you to customize it with your own logo or badge. This version of the ATMOS is also an all blackout, non-LED release, allowing for a super stealthy aesthetic. Cooler Master is leaping into the future with the ATMOS series.
Dual chamber design
Patented design
Our latest patented dual chamber design has been refined for enhanced cooling synergy. The new design increases water pressure and optimizes water flow directly to the CPU hot spot.
Improved quality
Fully automated production and assembly of the pump with fully recorded production history.
Tube clips included
Tube clips are made for AIO tube size that not only improve and strengthen your cooler setup but also can fix your ARGB or PWM cables.
Eco-friendly construction
The pump top cover has been constructed from recycled plastic materials, while 35% of the cooler's metal materials are recyclable. Along with sustainable packaging materials and a 30% reduction in total packaging size, the ATMOS is an eco-pioneer.
Mobius 120 black fans
Pre-installed Mobius 120mm black fans further improve cooling performance and simplify user installation.
LED colour | without LED |
Socket | AM4, AM5, LGA 1150, LGA 1151, LGA 1155, LGA 1156, LGA 1200, LGA 1700, LGA 1851 |
Number of fans | 2 Fan |
Fan dimension | 120 mm |
Item number | 60379755 |
Manufacturer | Cooler Master |
Category | CPU water coolers |
Manufacturer no. | MLX-D24M-A24PK-R1 |
Release date | 21.7.2025 |
External links |
Colour | Black |
Exact colour description | Black, Black |
LED colour | without LED |
Socket | AM4, AM5, LGA 1150, LGA 1151, LGA 1155, LGA 1156, LGA 1200, LGA 1700, LGA 1851 |
Number of fans | 2 Fan |
Fan dimension | 120 mm |
Max. Speed | 2400 RPM |
Airflow | 127.60 m³/h |
Static pressure | 3.63 mmH20 |
Radiator thickness | 27.20 mm |
Country of origin | China, Taiwan |
CO₂ emissions | 19,4 kg |
Climate contribution | EUR 0,49 |
Length | 277 mm |
Width | 119 mm |
Height | 272 mm |
Weight | 1338 g |
Product Safety |
Length | 41.30 cm |
Width | 21.70 cm |
Height | 14.80 cm |
Weight | 2.48 kg |
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Reviews & Ratings
Statutory warranty score
How often does a product of this brand in the «CPU water coolers» category have a defect within the first 24 months?
Source: Galaxus- 2.be quiet!0,8 %
- 3.Arctic0,9 %
- 3.Cooler Master0,9 %
- 5.Gigabyte1 %
- 5.MSI1 %
Statutory warranty case duration
How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?
Source: Galaxus- Cooler MasterNot enough data
- 1.Arctic0 days
- 2.Deepcool1 day
- 2.TRYX1 day
- 4.ASUS2 days
Return rate
How often is a product of this brand in the «CPU water coolers» category returned?
Source: Galaxus- 1.Phanteks3,1 %
- 2.Cooler Master4,2 %
- 3.TRYX4,3 %
- 4.Corsair4,4 %
- 5.Alphacool4,5 %