Cooler Master sends two new case fans onto the market with the unilluminated Mobius 120 and the illuminated counterpart Mobius 120P ARGB, which, together with the Mobius 120 OC not tested today, should give everything a good shake of the competitor products. However, the price is quite high at just under 25 euros for the shadow man and just under 29 euros for the illuminated spotlight, making it fierce competition for some higher-priced competitors. So the price is already something like the butter among the toppings, so you will wonder if and how Cooler Master will master the self-imposed high hurdle (or if they will break the bar). Of course, I don’t want to spoil anything, but the headline already reveals more than one should actually reveal at the beginning of a review. But somehow I have to get the hang of the price so that it doesn’t completely stop anyone from reading.
But let’s get back to the two Mobius fans. I’ll start with the name, because as a Saxon (and native of Leipzig) I can brag a little again. The Leipzig mathematician and astronomer August Ferdinand Möbius certainly stands for many things in mathematics, but one will know especially the so-called Möbius loop or the seemingly endless Möbius ribbon. Apart from that, there are also various movies where the evil one was then called Möbius (or Mobius in English).
The Cooler Master Mobius 120 thus also represents a bit of the dark side of the Force. And our small ARGB light propeller then brings light into the night again. Everything will be fine, even in the endless tape. And the nice Mr. Möbius, the light and the shadow is still more creative than all the halo, aura, bling-bling or luminosity 2000 stuff.
The rotors, with seven space-consuming blades, are certainly no surprise from a purely visual point of view, but the rotor blades are still connected with a ring around the outside. In addition to the stability and throughput, this also increases the static pressure somewhat, because the air can be pulled through in a more targeted manner and does not swirl or get lost in the gap between the rotor and the frame. The usual 4-pole motor is certainly not an innovation, but the bearing is very much so according to Cooler Master. The hydrodynamic plain bearing is also really smooth-running in reality, which is impressively proven by speeds below 100 rpm.
So you don’t always have to turn the tried and true upside down, but you can easily improve it. If you want to know all the technical details, I would like to refer you to the specifications below. Regarding the engine and bearing noises, however, I have later records of the complete speed ranges and, for the first time, the respective installation types. The OEM has certainly built much worse fans, but hardly better ones. And with that, there are already a few advance laurels on the head.
The weight of 164 grams for the Mobius 120 and 179 grams for the Mobius 120P ARGB is not surprising because the parts seem quite massive. The manufacturer states the thickness (installation depth) as 25 mm, which is not quite right, because it is 26 mm! You have to know that when it could be tight! The gap dimensions of a maximum of 1.3 mm between the rotor and frame are very good and the surface finish is definitely not objectionable.
The decoupling of the frame is done by glued rubber applications on the four corners. It works, but it’s not really that innovative. By the way, the usual 4 screws for the case are also included, there is nothing more. Well, you don’t need more than that, just proper play money in the store. But that’s nothing new these days, either, because everyone’s been reaching for it lately.
On the next page you will first see how and what we test and why. Understanding the details is incredibly important in order to be able to objectively classify the results later. The differences between many models are more in the details and the best fan for all situations can hardly exist. There is a certain optimum in every situation and, of course, good all-rounders. But they usually have their price. However, if you are planning very specifically with 60 mm radiators, for example, you might be able to save money by choosing the best model for your intended use, which might not perform so well as a case fan. And vice versa, of course.