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Cooler Master Seidon 240M

Posted June 15, 2013 by Will in Cooling







Total Score


Price at time of Review: $89.99 at NewEgg


Great performance, easy installation, great price, re-positionable tubing.


Fans very loud at higher speeds, blue LED may not fit all builds and cannot be turned off.

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by Will
Full Article


AiO (all in one) CPU coolers have been around for quite some time now. These days just about every company is coming out with their own version and most of them typically look the same with only one or two distinguishing features. Then there’s the Cooler Master Seidon 240M. The Seidon on the surface seems like your typical 240mm AiO CPU cooler, but Cooler Master has added their own unique style to this unit. They were kind enough to send one out for me to put it through the wringer so I did just that! Let’s get to it shall we?


“The Seidon 240M is Cooler Master’s latest addition to its incredibly compact watercooling kit line that aims to bring watercooling to the masses. It fits in many cases that support 2 x 120mm fan radiators, is compatible with every available Intel and AMD platform, and is as easy to install as traditional heatsink. It comes factory filled, sealed and tested with a two year zero maintenance guarantee. Thanks to two 120mm PWM fans with a wide RPM range, Seidon can operate silently or unleash a powerful cooling storm at your command.” – Cooler Master



    Shane Dickson (Oregon Slacker)

    Great Review, I bought one the second they came out, great purchase!!!

    Bill Barnes

    Great review and definatly a nice Cooler! Been looking at it from day one and surely is something I would like to have in my Current RIG which I intend on upgrading soon with the FX 8350 a new Motherboard and the Cooler Master Stryker! Probably consist on me trading off some parts to offset the cost of the components I want but thats a decent trade off to get the build I want! Maybe the Seidon will be a part of this build! Definatly considering it!


    Good morning,
    My COOLERMASTER Seidon 240M. blue led is not on. What will be the problem?
    Please help me.
    Thanks a lot.


    So far I am kinda disappointed with the performance of this with my FX8350. At stock clock, it is fine but I currently have mine at 4.5GHz and the CPU get to 58*C which from what I have read is only a couple off from the max of 65*C for the FX8350. I tried 4.8GHz at first and within a couple minutes of playing BF4, I was over 72*C. I was kinda expecting the larger 240M radiator to do better at cooling it. I don’t know it it is the fans or something with the mooting but at about 54*C my fans come on high and I get a bad rattle. I have tried adjusting the screws and making sure the rubber dampeners are secured but still have a rattle.

      Sandy Bruce

      Hey. Sorry to hear you are not getting what you expected from the Seidon 240M. We can help you with your cooling and OC issues in the forum. Would be a lot easier to do there instead of here. Just post what you wrote above in the forum and we will do what we can to get those temps down. Im Cyberburnout on the forums. Look forward to helping.

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