Cooler Master Nepton 240M Review


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Liquid Cooling Final Thoughts

Working with the Cooler Master Nepton 240M was an overall enjoyable experience, and the performance of the device appears to be ahead of the current competition.

The attention to small details such as providing a dual fan header for attachment to a single motherboard connector goes a long way towards an easy installation. Cooler Master even includes a set of extra long bolts to allow two additional fans to be added in push pull configuration on the top of the unit. A rubber gasket for keeping the fans quiet is another inclusion that is not often seen in liquid cooler systems.

Cooler Master Nepton 240M Ortho2

Cooler Master Nepton 240M Conclusion

The real surprise during evaluation of this product was its exceptional performance in terms of quiet operation and cooling ability. It is impressive to see this cooler outperform a 280 mm premium cooling system.

The Nepton 240M clearly delivers on its promise of exceptional cooling performance and silent operation.

At full speed operation, the Nepton 240M was capable of cooling an eight core processor 5° lower than the 280 mm Corsair H110. It was also able to perform this cooling while maintaining a noise level that was 4 dB(A) below the Corsair H110.

A CPU liquid cooing system is usually hidden from view, but the Nepton 240M inclusion of premium mounting hardware and a minimal pump design will easily satisfy the aesthetics of a typical PC build.

The Nepton 240M has standout construction features, with very solid mounting bolts and an easy attachment procedure to the CPU. The addition of a rubber gasket for fan attachment adds to the quality of the assembly.

An important part in the evaluation of a CPU cooler is the overall ease of installation. The Nepton 240M has clearly been designed to make the installation process as convenient as possible. Simple mounting options for a top-mounted radiator allows the unit to be installed with the computer case upright. Many other cooling systems require that the case be laid flat to allow the complicated threading of the bolts through the fans to attach to the radiator.

The Cooler Master Nepton 240M was easy to install, and it’s exceptional performance and silent operation make it an obvious choice for any new liquid cooling installations. Even older liquid CPU cooling systems could be upgraded to the Nepton 240M for improved cooling and quieter operation, which may result in improved overclocking performance.

Pros:Benchmark Reviews Golden Tachometer Award Logo (Small)

+Extremely quiet
+Excellent cooling performance
+Easy assembly and mounting
+Rubber gasket included for reducing fan vibration
+Thermal paste included
+Dual fan header included


– CPU block attachment requires attaching standoffs to motherboard
– No fan speed controller


  • Performance: 9.50
  • Appearance: 9.00
  • Construction: 9.00
  • Functionality: 9.00
  • Value: 8.50

Final Score: 9.0 out of 10.



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  1. Andrew Lane

    Hopefully they don’t have the same bearing issue that Corsair had with their version of this unit (H100)…

    1. Aidan Moore


      Time will tell. I’m very impressed with the silence of the unit so far in a 24/7 system , so I’ll be listening for any developing rattling or squeaking.

      BTW, I ran a Corsair H100 for 3 years without developing any bearing noise. The H100 is a good unit, but it’s stock fans run very loud under load.


  2. Marco

    I have a swiftech H220 in a long RMA and I’m thinking to buy the Nepton 240M. How is the H220 vs Nepton 240M ?

    1. Aidan Moore

      Hi Marco,

      Looking at the H220 specifications, the two units appear to be similar in performance. You will notice the lower noise of the Nepton (6.5 dBA min) vs the Swiftech (16dBA min).

      And the Nepton has a 5 year warranty vs the 3 years for the Swiftech. Overall the Nepton would be a great choice. I’ve been using it 24/7 with no issues.

      Good luck!

      1. Marco

        Hi Aidan,

        thanks for your prompt reply. The new Silencio fan do a great job! What about the pump ? Is it silent ?

        1. Marco


          1. Aidan Moore

            Hi Marco,

            Yes. The pump is inaudible even with the case open. All in all it’s a very quiet closed loop cooling system.


  3. marco

    Hi Aidan
    Thanks for info.

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