Cooler Master MasterLiquid Atmos II Stealth 360 AIO Cooler Review

The Cooler Master MasterLiquid Atmos II Stealth is an interesting AIO cooler that is largely based on a previous design which rebuilt the CM dual chamber AIO pump block into something extremely compact with decent performance.  The original release supported ARGB and a larger list of processors and eventually made it to the Hardware Asylum Labs test bench, albeit with more powerful fans. 

In this review we looked at the MasterLiquid Atmos II Stealth which is a down market version of the PL360 Flux.  The design is largely the same but offers a few unique upgrades including replaceable pump tops.  These tops give the cooler a unique style but lack the ARGB that most users are expecting.  In addition to plastic and metal finish toppers the Atmos II Stealth includes a VRM cooling fan to help move air around your motherboards VRM to improve system stability and lower overall temps.

The fan is extremely quiet but does require a dedicated fan connection.  Upgraded coolers will have options for LCD and LED displays and thus expanding on what dedicated AIOs normally provide in a package with customization options.  Basically, different faces for a single cooler and options to change them whenever you ADHD kicks in.

I am extremely unimpressed with the new Mobius fans that come with the Atmos II Stealth and I wasn’t impressed with the Flux ARGB fans that came on the previous design.  They don’t move the right amount of air and the ring design may provide some benefits it also screams “this fan is cheap and needs to be reinforced”.  I have three stacks of 120mm fans that are better than these air movers and some are also extremely cheap.

Overal, I am a little underwhelmed with the MasterLiquid Atmos II Stealth.  From a performance standpoint our testing numbers showed a massive drop in thermal capacity and the lack of real features coincides with the marketing to be a “less expensive” cooler for users that don’t need all the boxes checked.  I am impressed with the quick-change top option with six small magnets holding the toppers in place.  The included VRM cooler is a nice addition that should have been a standard feature with AIO coolers since the very beginning.  I’m also a fan of the factory cable management that replaced individual fan tails with two hidden cables, one for the pump and another for the trio of 120mm fans.  Sadly, you have to then attach a fan tail to each cable to use the cooler but, at least there was an effort.

Quiet Operation
Unique Pumpblock Design
Quick Installation
Braided Hoses
Hidden Cables
No ARGB Lights
Multi Tops

CM logo doesn’t line up
Cables require an extension to be attached
No argb lights