Cooler Master unveiled the updated MasterLiquid AIO CPU liquid coolers at CES 2026, headlined by the new Atmos II Stealth series. This release focuses on performance, stealth aesthetics, and high customizability. The Atmos II Stealth features new waterblock covers and replaces previous Sickleflow Edge fans with unannounced Mobius 120 Black fans, which operate at a slightly reduced 2400 RPM for quieter operation.

A standout innovation is the impressively thin pump design. Users can magnetically attach accessories like an LCD panel, a Pixel LED module, or a VRM fan to the pump block, offering versatile customization. While the pump internals retain the proven Dual Chamber design, the focus on sleeker hardware addresses the growing demand for clean, powerful builds.

This expansion signals Cooler Master's commitment to refining liquid cooling technology for enthusiasts seeking both form and function.