The Seidon 120XL is Cooler Master’s latest, incredibly compact water cooling kit that aims to bring water cooling to the masses. It comes factory filled, sealed, and tested with a two year zero maintenance guarantee. The high performance 38mm thick radiator was designed to dissipate extreme heat from overclocked CPUs. Thanks to two 120mm PWM fans with wide RPM ranges, Seidon can operate silently, or unleash a powerful cooling storm at your command.