Cooler Master Releases Seidon Liquid CPU Coolers

Cooler Master's new Seidon 120XL liquid CPU cooler is a higher-end version of its original 120M cooler. Beyond having an extra added fan, the radiator is also a tad thicker. The original 120M had a radiator with a 27mm thickness, while the new 120XL has a radiator that's 38mm thick. The CPU block hasn't changed; it is still made of copper and has a 1.8 watt pump that has a MTBF (Mean Time Between Failure) of 40,000 hours. 

The Seidon 240M is the bigger version of the 120M, with a radiator that is 240mm long rather than 120mm. The radiator's thickness remains the same, at 27mm, and is only meant to house the fans on one side, not both. The CPU block has a similar copper base as the 120XL, but has a more durable pump with a rated MTBF of 70,000 hours.

The fans that come with both units are identical. The 120mm fans spin at speeds from just 600 rpm all the way up to 2400 rpm. This gives these units the potential to be very silent, or very loud when they need to deliver some proper cooling power. Both the coolers are compatible with almost all modern CPU sockets, amongst which Intel LGA 1155, LGA 1156, LGA 1366, LGA 2011, along with AMD's AM2, AM3, AM3+, FM1 and FM2 sockets.

The Seidon 240M has already been listed on Newegg for $94.99.

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Niels Broekhuijsen

Niels Broekhuijsen is a Contributing Writer for Tom's Hardware US. He reviews cases, water cooling and pc builds.

  • A Bad Day
    If you're going to push out of the slim/mobile desktop market and into the higher end cooling, either make it more customizable or go bigger/better.

    (Big air coolers have a mobility issue. Bump the case the wrong way, and the motherboard may snap.)
  • TheBigTroll
    what makes this so special in the already saturated liquid cooler market?
  • mansfield
  • tomfreak
    and no close loop GPU cooler.
  • samuelspark
    $80 for a 240mm rad after rebate. That's really cheap. 0.o
  • halcyon
    Why is this better than Corsair's (or anyone else's offerings)?
  • A Bad Day
    Tomfreakand no close loop GPU cooler.
    Where are you going to mount it? Side casing is not possible because not all cases support side fans, and some only have enough space for a fan.
  • mouse24
    A Bad Day(Big air coolers have a mobility issue. Bump the case the wrong way, and the motherboard may snap.)

    I have a hyper 212 EVO and have literally fallen into my case knocking it over and still had no issues with anything snapping. Though the evo isn't a HUGE cooler.
  • cats_Paw
    I still use my Thermaltake Kandalf LCS original cooler keeping my Q6600 very cool (on stock its cooler than ambient temps by 1 C, dont ask me how thats possible).

    I think all these fixed cooling systems have no chance vs some Swiftech//monster radiators.

    And if you do mvoe into water cooling, you probably want exactly that.
  • morne
    Still prefer the Corsair ones over Coolermaster