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    Cooler Master Atmos Stealth AIO CPU Liquid Cooler - 360mm Radiator with 3X Mobius PWM Fans, Dual-Chamber Pump, Low Noise, AMD AM5/AM4 & Intel LGA 1851/1700, Black

    • Cool for R9|i9: Patented Next Gen Dual Chamber enhances water pressure and optimizes flow directly to the CPU hotspot, for AMD R9 and Intel i9.
    • Fine Tuned Performance: Precision-engineered ultra-thin spade fins optimize microchannels for targeted heat dissipation.
    • Mobius 120 Fan: Pre-installed Mobius fans deliver premium airflow with optimized PWM blades, while simplifying the installation.
    • Ring Blade Design: Interconnected fan blades engineered to form a robust, rigid structure that minimizes vibrations, ensuring stable and fluid airflow
    • Dynamic PWM Fan: A PWM 4-pin header allows adjustable fan speeds from 0 to 2,400 RPM, to balance noise and airflow
    • Simplify Brackets: Redesigned brackets simplify installation on AM5 and LGA 1851|1700 platforms.
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    Overview
    Specs
    Reviews (16)
    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    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 air flow and are preinstalled to simplify installation and the overall user experience.

    • Exceptional silence
    • Optimized user experience
    • Fully customizable
    • Eco-friendly construction
    • Refined dual chamber design
    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    3 x 120mm fans

    MASTERLIQUID 360 ATMOS STEALTH

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    2 x 120mm fans

    MASTERLIQUID 240 ATMOS STEALTH

    The MacBook Pro is powered by powerful Intel Core i5 dual-core processor that features a burst speed of up to 3.1 GHz.

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler
    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    Design

    Fully customizable

    Customize the pump top cover with your 3D designs and take full control of the ARGB Gen 2 lighting. The Atmos provides unprecented creative freedom.

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    Cooling System

    DUAL CHAMBER DESIGN

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    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 CPU hot spot.

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    DUAL CHAMBER DESIGN

    Improved Quality

    Fully automated production and assembly of the pump with fully recorded production history.

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    Gadget

    TUBE CLIPS INCLUDE

    Tube clips are made for AIO tube size that not only to improve and strengthen your cooler setup,but also can fix your ARGB or PWM cables.

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    Gadget

    THERMAL PASTE?APPLICATION STICKER

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler
    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    Materials

    Eco-friendly construction

    The pump top cover has been constructed from recycled plastic materials, while 35% of the cooler's metal materials are recycable. Along with sustainable packaging materials and a 30% reduction in total packaging size, the Atmos is an eco-pioneer.

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    Fans

    MOBIUS 120 BLACK FANS

    Pre-installed Mobius 120mm black fans further improve cooling performance and simplify user installation.

    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler
    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler
    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler
    Cooler Master 360 Atmos Stealth High Performance Close-Loop AIO Liquid Cooler

    Warranty & Returns

    Warranty, Returns, And Additional Information

    Warranty

    • Limited Warranty period (parts): 2 years
    • Limited Warranty period (labor): 2 years
    • Read full details

    Return Policies

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    The Cooler Master MasterLiquid 360 Atmos Stealth is a 360mm AIO CPU liquid cooler with a dual-chamber pump and three pre-installed Mobius 120mm PWM fans, suited to builders cooling high-performance AMD Ryzen 9 or Intel Core i9 systems with a case that supports a 360mm radiator.

    Recommended For

    • PC builders cooling a high-wattage Ryzen 9 or Intel Core i9 for long gaming sessions or workstation workloads, who want a 360mm AIO and a discreet black design.
    • Builders aiming for a subdued, non-RGB PC interior: the Stealth model uses a black, non-LED design rather than lighting as a visual feature.
    • AM4, AM5, LGA 1700, or LGA 1851 system builders who want a pre-fanned 360mm cooler with a simplified mounting process.
    • Builders who want a configurable pump-block appearance and optional airflow directed at motherboard components, using the included interchangeable Flex Kit covers.

    Real-World Use Scenarios

    • When gaming on a high-end Ryzen 9 or Intel Core i9 system, the 360 Atmos Stealth provides substantial CPU cooling capacity; fan speed and noise can still rise during demanding games or heavy background tasks.
    • For long CPU-heavy sessions such as rendering or compiling, its 360 mm radiator is suited to moving heat away during sustained workloads; expect the fans to become more audible if the processor remains under full load.
    • In a quiet-focused PC build, users can tune the PWM fan curve to balance cooling and noise for everyday work or gaming; under heavy loads, the fans may ramp up, so quiet operation is not guaranteed at all times.
    • For an all-black, non-RGB build, the cooler's understated finish avoids lighting in the case while its removable pump cover allows a custom badge or design.
    • When assembling a compatible AM4/AM5 or Intel LGA 1851/1700 system, the fans arrive pre-installed to simplify cooler setup; check that the case has room for a 360 mm radiator before choosing this cooler.

    Spec Summary

    AttributeValue
    Best ForDesktop CPU liquid cooling on supported AMD AM4/AM5 or Intel LGA platforms
    Socket CompatibilityAMD Socket AM4 and AM5; Intel LGA 1150, 1151, 1155, 1156, 1200, 1700, and 1851
    Pump84.9 × 81 × 53.15 mm pump with noise rated below 25 dBA
    Radiator394 mm aluminum radiator
    Fan Performance And ConnectivityThree 120 × 120 × 25 mm fans with loop dynamic bearings, 75.2 CFM airflow, up to 3.63 mmH₂O pressure, and 0–2,400 RPM (±10%); 4-pin PWM connection. Fan noise is rated at 30 dBA
    MaterialsListed materials include aluminum, copper, plastic, and rubber
    AppearanceBlack, with no LED lighting
    Model IdentifiersCooler Master MasterLiquid 360 Atmos Stealth; part number MLX-D36M-A24PK-R1