SilverStone Suscool 121
The next fan we will talk about was provided by the well-known SilverStone Company using a lot of Everflow solutions for their products. The fan is called Suscool 121 and is shipped in clear plastic casing:
You can see the entire fan through the front of the package and get detailed information about its features and specifications and even a performance diagram on the back of it. The front side of the box claims that Suscool 121 is the quietest thermal control fan in the world. It could surely be true, because there are very few 120 mm fans out there featuring thermal control diode.
The fan is bundled with a PATA power connector/cable, a cable with a thermal diode, four silicone mounting spindles and four self-tapping screws:
The fan is made in China.
If you remember what we said about other SilverStone fans that we reviewed before, you may get a déjà vu feeling, because Suscool 121 looks very similar to SilverStone FM121 and FM122 fans, only its blades are of light-blue color instead of white:
The fan measures 120x120x25 mm, its weight is not specified. It has 9 blades and a rotor with 43 mm diameter:
The fan rotation speed is controlled by a thermal diode in the interval from 400 RPM at 31 °C up to 950 RPM at 60 °C. Aggressively curved crescent-shaped blades create 17.75 CFM and 42.15 CFM airflow at these respective speeds at a very modest static pressure of 0.1 and 0.57 mmH2O. The declared noise level is really low: 15 and 18 DBA respectively. Actually, Suscool 121 is designed solely for quiet operation that is why we shouldn’t expect it to work any performance wonders.
This fan uses what is known as “Enter Bearing” and in reality is a common sleeve bearing with somehow extended lifespan. Although the specifications claim that its MTBF is only 30,000 hours, which is pretty typical of common sleeve bearings (without any optimizations).
The fan should start at 8 V – it is the highest startup voltage of all today’s testing participants. At the minimal rotation speed the fan should do with only 0.08 A and 0.96 W of power, while at maximum speed – with 0.2 A and 2.4 W of power.
As you can see from the marking on the fan spindle, this Everflow model is called F121225SL. Suscool 121 is priced at about $12.
Since we manually adjusted the rotation speeds of our tested fans, SilverStone Suscool 121 thermal diode has been constantly kept at 60 °C. Let’s check out the obtained results:
The results speak for themselves. Suscool 121 is a very quiet fan with low rotation speed and moderate airflow. I could only point out sharp rotation speed increase from 180 to 720 RPM when we raise the voltage by only 0.9 V. the fan consumes very little power, but can start only at 9.6 V.