Cooler Master Seidon 240M All-in-One Liquid CPU Cooler Review

CoolerMaster Seidon 240M All-in-One Liquid CPU Cooler Review - IntroCooler Master's Seidon 240M will be their first 240mm all-in-one (AIO) watercooler, and it differentiates itself from its numerous competitors with a lower profile, quieter, and more efficient pump and contact base which will please your eyes just as well as your overclocking aspirations.  Cooler Master has paired the 240mm radiator with a pair of very quiet fans that allow 4.0GHz overclocks without being much noisier than someone whispering to you, and it's a relative breeze (sorry, couldn't resist the pun) to install.


Although the Seidon 240M looks exceedingly-similar to existing 240mm all-in-one liquid coolers, it is entirely Cooler Master-designed and manufactured.  The most obvious of the original features is the much slimmer pump and pump housing.  The all-copper contact base has tiny channels on the inside of the pump housing creating a mini-heatsink to increase the thermal transfer rate from your processor to the liquid and out of your case through your radiator.  Zero maintenance, universal mounting, and straightforward installation create a competitive package at the $99.99 MSRP price point.
  • Pre-filled, closed-loop liquid cooling system requires zero maintenance
  • Efficient Design for Overclocking
  • UltraFine Micro Channel doubles liquid-base contact and optimizes water flow and heat dissipation
  • Powerful and Durable Water Pump - dissipates head effectively and maintains temperatures through stable water circulation
  • Universal mounting

*Courtesy of Coolermaster


Cooler Specifications

Socket Compatibility

Intel Socket LGA 2011 / 1150 / 1366 / 1155 / 1156 / 775

AMD Socket FM2 / FM1 / AM3+ / AM3 / AM2

Radiator Height (withoout fan) 27 mm
Radiator Width (without fan) 120 mm 
Radiator Depth (without fan) 273 mm 
Fan Height
120 mm    
Fan Width
120 mm
Fan Depth
25 mm
Radiator Material Radiator: Aluminum
Pump Life Expectancy 70,000 Hours
Pump Noise Level <25 dBA
Pump Power Consumption
Included in the Box
  • 240mm Radiator with hoses and pump / cooling base
  • Universal Mounting Brackets / Bolts
  • Tube of thermal compound
  • Anti-vibration grommet
  • Two 120mm fan
  • Installation Manual
Warranty 2 Years
Fan Specifications
Max Rotational Speed (+/- 10%) 2400 RPM
Min Rotational Speed (PWM) 600 RPM
Fan Air Pressure (+/- 10%) 0.31~4.16mm H20
Fan Airflow (+/- 10%)

19.17 ~ 86.15 CFM

Fan Noise Level 19~40 dBA
Fan Bearing Type Rifle Bearing
Fan Connector 4-pin
Input Power 3.6 W
Voltage Range  12 V
MTBF  40,000 hours

*Courtesy of Cooler Master


Packaging and Included Accessories


CoolerMaster Seidon 240M All-in-One Liquid CPU Cooler Review - BoxCoolerMaster Seidon 240M All-in-One Liquid CPU Cooler Review - Box Back

CoolerMaster Seidon 240M All-in-One Liquid CPU Cooler Review - Included Accessories

The Seidon 240 comes neatly (and safely) packaged and unpacks to reveal the 240mm radiator, hoses, and pump / base as well as warranty documentation, multilingual installation instructions, and a hefty bag of parts (including thermal paste) enabling universal mounting compatibility.

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