The Cooler Master Seidon 240M is a liquid cooling system for processors. It has a 240 mm radiator with two 120 mm fans side-by-side. Let’s test it.

As with any sealed liquid cooling system, the Seidon 240M comes with the coolant liquid pre-filled inside the loop (block, radiator, pump, and hoses). We recently tested two versions of this product, the Seidon 120M and the Seidon 120XL, both with 120 mm radiators; the Seidon 240M has a longer 240 mm radiator. To be more accurate, we say “a 240 mm radiator” because it is designed to be cooled by two 120 mm side-by side fans.

Figure 1 shows the box of the Cooler Master Seidon 240M.

Cooler Master Seidon 240MFigure 1: Package

Figure 2 shows the contents of the box: the radiator-block set, fans, a Y-harness, a rubber frame to install between the fans and the radiator, a manual, a small syringe of thermal compound, and installation hardware.

Cooler Master Seidon 240MFigure 2: Accessories

This watercooler is discussed in detail in the following pages.

Rafael Otto Coelho is a physicist with a master's degree in Education, and is a college professor in Brazil.