Cooler Master Seidon 240M Liquid CPU Cooler Review

by - 7 years ago



Cooler Master’s Seidon 120M impressed us a while back with its solid price to performance ratio, offering similar performance to the competition at a price that was quite a bit lower. The Seidon 240M promises to do a similar thing, although this is very much a “budget” attempt at a premium product – so while the Enermax ELC 240, Corsair H100i and Thermaltake Water 2.0 Extreme all cost £88, £92 and £105 respectively, the Cooler Master Seidon 240M promises to come to market at around £80 which is about 10-20% cheaper than the competition.

Like most 240mm All-In-One products in the market the design is relatively standardised – A pair of standard thickness 120mm PWM fans, a 27mm thick 240mm aluminium radiator, a standard looking pump that is similar to the Asetek core design (as signalled by the fact Asetek are taking Cooler Master to court over it) and some standard length tubing. Cooler Master aren’t bringing anything ground-breaking to market here but what they are looking to do is offer the best value for money 240mm AIO unit on the market.

The packaging to Cooler Master’s Seidon 240M uses Cooler Master’s traditional plum and black colour scheme and points out all the key features – none of which are surprising for the type of unit this is.


Article Index

  1. Introduction
  2. A Closer Look
  3. Installation
  4. Test System and Methodology
  5. Performance
  6. Conclusion
  7. View All

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5 Comments on Cooler Master Seidon 240M Liquid CPU Cooler Review

  • Avatar Wayne says:

    Yeah those stiff corrugated plastic pipes smack of cheapness. It’s gonna be a deal breaker for some.
    I stand corrected but I’m sure Antec offer a 3 year warranty with their AIO’s. I’m just too lazy to confirm it.

    • Avatar Ryan Martin says:

      Having reviewed the Antec Kuhler 1220, yes you are correct. it is a 3 year warranty on those 😛

    • Avatar Saraht5 says:

      Those “plastic” tubes are actually FEP (Fluorinated ethylene propylene) an industrial grade thermoplastic with excellent chemical and physical stability and all round long term durability even in very harsh conditions.
      FEP also has very low permeability to a wide range of liquids, obviously the reason why it’s used in non refillable AIO coolers.

      In short, FEP is not a “cheap material”. Until recently, virtually all Asetek and CoolIT units used FEP. Some of the newest AIO units like the Enermax/Coolermaster ones still do.

      Asetek say they moved to the flexible rubber tubing type (some special low permeability rubber) because it’s easier to bend and not because it is more durable or has better evaporation characteristics. Note the rubber tubes have to be much thicker than the FEP ones to achieve the same low evaporation rate.

      CooliT now does consumer units (the Corsair h100i/h80i) with low permeability rubber, but claims they still use FEP for their server coolers because “FEP is a server grade material and rubber is not”.

      According to a Coolermaster rep- they chose FEP for the Seidon’s deliberately, because they felt a rubber was less durable and would still have too high an evaporation rate where the cooler would be in high ambient temperatures. Whether you believe Coolermaster or not, their statement lines up with the science.

      • Avatar Ryan Martin says:

        thanks for the info 🙂 I appreciate a different perspective on it. From the science perspective it does make sense, although from a system builders point of view it isn’t amazing. I guess they could used the kind of tubing that is both low evaporation and more flexible but hey you win some and you lose some (like you see on custom loops)

        • Avatar Saraht5 says:

          Oh, no problem and thank you. I hope I didn’t sound like I was lecturing- I’m no expert on the matter at all. I enjoyed the review, it was a good one.

          I do agree with you :-), the difference in evaporation/longevity between FEP vs Rubber won’t be important for even very demanding system builders.

          Was just taking the opportunity to counter the weirdly common statement in the PC enthusiast community that “FEP tubing is cheap and nasty”. As noted it’s actually quite the opposite: It’s a common industrial strength material employed specifically for it’s inertness, toughness and high reliability.

          As Asetek have discovered though, FEP is probably overkill for a tiny computer liquid cooling system rated for 5 years of usage. Who’s can say, despite the warm fuzzy advertising, that their new rubber tubing isn’t just nicer to bend but is actually cheaper to produce than FEP as well ?.

          Hopefully we’ll see that “super tubing” one day. ‘Norprene’ tubing kind of has that status for folks building custom loops. It’s pretty flexible but at reasonable thicknesses has (low) permeability in the ballpark of FEP.

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