Alphacool SL-15 PWM: Low profile does not equal low airflow

Results: Airflow through a hexagonal grille

There are situations where standard 25 mm fans will not fit. Even the 120 mm format therefore offers lower alternatives. The first thing that naturally comes to mind is that such fans mean a trade-off in cooling efficiency. However, this may not be true and the hassle of thinking about how to fit a thicker fan inside may even be quite unnecessary. A well-designed rotor can achieve fully-fledged results when compared to a thicker rotor, even if it is slimmer.

Results: Airflow through a hexagonal grille








Why is there a missing value sometimes? There may be more reasons. Usually it is because the fan could not be adjusted to the target noise level. Some have a higher minimum speed (or the speed is low, but the motor is too noisy) or it is a slower fan that will not reach the higher decibels. But the results in the graphs are also missing if the rotor is brushing against the nylon filter mesh. In that case, we evaluate this combination as incompatible. And zero in the graphs is naturally also in situations where we measure 0.00. This is a common occurrence at extremely low speeds with obstructions or within vibration measurements.


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The armored Apex Stealth fans promise the “impossible”

Alphacool has unleashed the new Apex Stealth fans on the world, which attract attention for two things in particular. Firstly, the fact that they contain robust metal elements and secondly, the specifications. These seem to be literally incredible, and while we have no doubt that the efficiency of these fans will be top notch, it’s hard to find elements for which they should be “the best”, as the specs suggest. Read more “The armored Apex Stealth fans promise the “impossible”” »

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Alphacool introduces the “Core” series of high-speed fans

Six new models, with the slowest capping at 2,000 rpm and the fastest up to 4,000 rpm. It’s a mix of 120 and 140-millimeter fans, where with the larger format Alphacool reached for differently modeled rotors. This is also with a view to ensuring that a fan this fast and relatively large can operate at all at reasonably low vibration. Among Alphacool’s new products is therefore a fan with more robust blades as well. Read more “Alphacool introduces the “Core” series of high-speed fans” »

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Plastic vs. metal backplate Alphacool (under LGA 1700)

For rather incomprehensible reasons, the cooling performance of the vast majority of AIO liquid coolers is degraded by the use of an unsuitable backplate. The backplate is usually undersized, made of plastic, and cannot exert optimal pressure on the processor. To give you an idea of how a “traditional” plastic backplate stacks up against a proper, steel one, we’ve prepared a comparison of the two. Read more “Plastic vs. metal backplate Alphacool (under LGA 1700)” »

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