Closer Examination

The Endorfy Fluctus 120 PWM is a standard PC fan in that it uses a 120 x 120 mm square frame and is 25 mm thick, thus ensuring increased compatibility with other PC components. This non-RGB version has a black rotor and frame, further making it easy to match your PC build color scheme. But then your eyes no doubt get drawn to the nine blades used here, with the serrated edge that is also fairly curved. This is part of the psychoacoustic optimization Endorfy claims with the Fluctus 120, effectively making the fan sound more pleasant and potentially also less loud to your ears than what a noise meter would register. It's not the first fan to do this of course, there have been many fans with various such implementations over the years. Some brands also dig deeper with an optimized frame too, let alone the stator vanes, bearings, and the motors used. Usually, the blades are optimized to push air such that the upper mids (800 Hz to 3000 Hz, say) are attenuated, which is where the human ears are more sensitive. Other than this, we see the product name on the inner frame, a logo on the central hub cover, the aforementioned updated anti-vibration rubber pads on the corners, and an open corner implementation making it easier to install the fans. The sides also have arrows indicating the direction of blades rotating and that of the air flowing through the fans.


From the back we see a typical 4-way stator vane configuration leading from the hub which has a sticker that tells us the fan is rated for a max current draw of 0.3 A (3.6 W on the 12 VDC rail). This includes start-up boost, but even so I only measured a max power draw of 2.1 W per fan—you should be plenty fine running 3-4 of these off a standard 1 A fan header. Endorfy tells us the fan uses a fluid-dynamic bearing, which is nice for longevity and performance, but does not provide any further information about the motor or even the fan's rated performance. The product page is full of marketing jargon, some of which doesn't even make sense. So perhaps the brand should take some time to more carefully vet information on its website. Regardless, we see a 4-wire cable in a flat ribbon style emerging from the hub and leading outward, and this is also black to match the rest of the fan. This is a pigtail cable with a 20-cm long section terminating in a 4-pin PWM connector and then a second 13-cm long extension going to a female 4-pin connector to use with other fans. Daisy-chaining fans together is less elegant than most such solutions on the market today, you have to really think about how to put the fans together and even so will have to hide the unused cable section in the gap between the adjacent sides of the neighboring fans—good thing these have rounded surfaces to the outer frame for this added space then. The end result should be a single PWM cable, which you will likely use with the provided extension cable too.