SilverStone IceMyst 420 liquid cooler

Expandable 420 mm AIO cooler

The SilverStone IceMyst 420 is a closed-loop liquid cooler with a 420 mm radiator and an expandable water block that accepts stackable 70 mm IMF70 fan modules. A three-phase six-pole pump motor and a 360° rotatable top cover keep the unit quiet while allowing flexible hose routing. An included ARGB controller provides ten lighting modes with adjustable brightness and colour-change speed.

Upgrade from smaller AIOs or air coolers

The 420 mm radiator surface and bundled radiator-optimised fans deliver higher airflow and static pressure than 240 mm, 280 mm or 360 mm models, making the jump worthwhile when thermal headroom limits CPU boost clocks. Builders whose current cooler cannot dissipate the heat of modern high-TDP processors will see lower core temperatures and quieter operation under sustained loads.

Fits modern Intel and AMD platforms

The cooler mounts on LGA 115X, 1200, 1700, 1851, 2011 and 2066 sockets as well as AMD Socket AM4 and AM5, covering current mainstream and high-end desktop CPUs. Modular cabling reduces clutter around the CPU socket, while the stackable IMF70 fans direct extra airflow toward VRM heatsinks or M.2 slots when case clearance permits. Buyers who need a single-slot air cooler or lack space for a 420 mm radiator cannot use this product.