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Cooler Master Seidon 240M - All-In-One CPU Liquid Water Cooling System with 240mm Radiator and 2 Fans

  • Zero Maintenance design
  • Durable and Powerful Water Pump
  • Waterflow FEP Tubing
  • Dual 120mm Fans (High Air Pressure, Low Noise Output)

Following the success of the Seidon 120M, COOLER Master introduces an improved CPU water cooler Seidon 240M. It has all the cooling technologies of Seidon 120M applied and has larger radiator up to 240mm. The larger radiator not only sheds more heat but also supports two 120mm fans. The compact design brings it to the masses. Also, the Seidon 240M is designed with zero maintenance and universal CPU socket compatibility.

  • neweggFantastic cooling performanceThe durable and powerful water pump helps dissipate heat effectively and maintain temperatures through stable water circulation. The UltraFine Micro channels on the waterblock enlarge the contact surface between cold plate and coolant for more heat transfer. Performance 240mm radiator is designed to dissipate huge heat from overclocked CPU and can accommodate two 120mm PWM fans. The 120mm PWM fan offers a wide RPM range of 600~2400 +/- 10% allowing you to fine tune and balance fan noise and performance.
  • neweggZero maintenanceFactory filled with coolant, then sealed and pressure tested, the COOLER MASTER Seidon 240M requires zero maintenance for years.
  • neweggUniversal Socket CompatibilityThe COOLER MASTER Seidon 240M features universal socket support including Intel LGA2011, 1366, 1156, 1155 and LGA775 as well as AMD FM2, FM1, AM3+, AM3, AM2+, and AM2.

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Return Policies

  • Return for refund within: 30 days
  • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy