Cooler Master MasterLiquid Atmos II Pixel LED 240 AIO Cooler

The Cooler Master MasterLiquid Atmos II Pixel LED 240 AIO Cooler features a low profile pump with an impressive pixel LCD display, and quiet operation. Its aluminium radiator is paired with a high performance SickleFlow Edge ARGB dual fan setup, including durable loop dynamic bearings which ensure long lasting reliability. Designed for Intel and AMD sockets, the Atmos II is a versatile, powerful and stylish cooling solution.

Features

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MasterLiquid Atmos II Series

360 Degrees of Cool

Introducing Cooler Master’s all-new Atmos II Series CPU cooler, designed to elevate your cooling experience. The MasterLiquid Atmos II Series offers enhanced customisation, enabling users to upgrade their Atmos II with Flex-Kit to best suit their needs. The low-profile pump design makes it ideal for fitting into compact cases. The Atmos II Series delivers exceptional cooling performance, quieter operation, and the flexibility to personalise your build. Make it yours with Atmos II Series—the perfect blend of performance, customisation, and silence.

• Dual style covers
• Flex-Kit for modular upgrades
• SickleFlow Edge ARGB fans
• Ultra-low profile pump design
• Quick and easy installation
• Included CryoFuze Thermal Paste
• Tube Clips Included

Dual Colourways and Style Covers

Two decorative covers are included, they are held by magnets, and this makes them easy to change and allows you to make your personal preference.

Flex-Kit: Modular Upgrades

Supports multiple top cover kits for extra customisation, including LCD, Pixel LED, and VRM Fan.

*Contents may vary by each SKU. Please refer to the specification table on the packaging for the included Flex-Kit configuration.

LCD

The LCD panel provides a real-time display, and the MasterCTRL software supports the creation of GIFs, PNGs, JPGs, scrolling text, and the display of your music or video source.

Pixel LED

The Pixel LED panel also integrates custom patterns and system information via the MasterCTRL software,

VRM Fan

The VRM fan module cools motherboard hot zones with airflow in six directions. It can reduce temperatures by up to 10.2°C (Tested by Cooler Master Lab.), to improve both stability and performance.

Precision VRM Cooling

Validated by Cooler Master Lab, the VRM fan delivers targeted cooling, reducing temperatures by up to 10.2°C across critical components for enhanced performance and stability.

Cooling System - Dual Chamber Design

Patented Design

Cooler Masters latest patented dual chamber design has been refined for enhanced cooling synergy. The new design increases water pressure and optimises water flow directly to CPU hot spot.

Improved Quality

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

Tough. Reliable. Built to Endure.

Engineered with PPS and fibreglass, the MasterLiquid Atmos II pump housing delivers industrial-grade strength, exceptional heat resistance, and unmatched durability—designed for builders who demand long-lasting, high-performance cooling. It also passes extreme testing at 70°C for 3,000 hours and 120 °C for 12 hours (Tested by Cooler Master Lab using only the liquid cooling module. Results may vary by system and conditions.), ensuring reliable performance under the harshest conditions.

Pre-Installed SickleFlow Edge ARGB Fan

High RPM fan with low vibration ensure strong cooling with minimal noise, while the dual colour options complement different system aesthetics.

• Speed 2500 RPM
• Noise Level 38.5 dB(A)
• Airflow 190 CFM
• Air Pressure 3.61 mmH₂O

Engineered for Simplicity

Say goodbye to messy cables and hello to a cleaner, faster build. We‘ve seamlessly hidden the wiring inside the tubes—no more exposed pump cables cluttering your setup. Plus, by combining all fan connectors into a single streamlined cable, you get a sleek, minimalist look with less hassle. It’s smarter design that looks as good as it performs.

Ultra-Low Profile Pump Design

The flat design allows installation in cases of different sizes while maintaining strong performance.

Quick and Easy Installation

A quick-mount kit ensures compatibility with mainstream processor sockets and the pre-installed fans simplify setup.

Offset Mounting Brackets for LGA 1851

Due to the varying CPU hotspots across different platforms, there are corresponding mounting bracket solutions tailored for each. We recommend you use the included offset mounting brackets for LGA 1851 (Please check whether your motherboard is compatible with this offset bracket.), which precisely dissipate 4°C of heat from the centre of the CPU. (Tested by Cooler Master Lab.)

Smart, Sustainable, and Simple Packaging

Featuring eco-friendly materials, a 30% reduction in total packaging size, and intuitive, easy-to-navigate contents.