Cooler Master Seidon 240M Water Cooling System Review

Seidon 240M Overview
For a full unboxing and overview of the Seidon 240M check out our video below.

Taking the Seidon 240M out of the box the first thing that caught my attention was how thin the radiator and pump are. Generally the rads on these AIO units are pretty thin but the Seidon seems to take the cake, and depending on performance, it could be good or bad. In most instances thicker radiators have greater cooling capacity, this is why they are so popular in custom loops. However a thinner rad will allow for more possible mounting positions. Almost more surprising than the radiator being thin is the pumps height. We recently reviewed the Tt Water2.0 Extreme and I thought that had a short pump, but this one is shorter still. This is very nice as it takes some more bulk out of the build. You do have to wonder if it’s at the cost of pumping power?

Cooler Master Seidon 240M Water Cooling System Cooler Master Seidon 240M Water Cooling System Cooler Master Seidon 240M Water Cooling System

This kit comes with a whole lot of hardware included. It seems that CM spent quite a bit of time at Lowes in hardware filling baggies before shipping these out.

Cooler Master Seidon 240M Water Cooling System

An interesting item included is a rubber gasket for the two included 120mm CM fans. This presumably will help to seal the fans to the radiator as well as to provide some sound dampening. A very nice touch and not something often thought of and included.

Cooler Master Seidon 240M Water Cooling System

Other than those few items the gear seems to be normal AIO fare. You have two sizes of long screws. One for mounting the fans directly to the radiator, the other for passing through a mounting surface first then through the fan and into the radiator. As well as the long fan screws included is a set of short screws to attach the radiator directly to a mounting surface. You also get a pair of mounting brackets and back plates. One set for AMD the other of course Intel and Intel 2011 stand offs as well as the normal ones. There is a PWM two way splitter, and finally some CM branded thermal paste.