Scythe Kama PWM (DFS122512L-PWM)
The second model from Scythe is called Kama PWM. It is shipped in the same packaging but with a different paper insert.
Included with the fan are a PATA power adapter and screws.
People at Scythe seem to think that vibration-absorbing silicone pins are useless. I don’t agree with that. The recommended price of this model is lower than that of the Kama Flow 2. On the other hand, the fan is not cheap and is offered for $10.9. The warranty period is 2 years. The Kama PWM series also includes a faster model, DFS922512M-PWM, but we will talk about it in our upcoming review.
The Japanese fan is black again but different from the previous model.
The impeller is 112 millimeters in diameter. Three of the fan spokes are 4 millimeters wide; the cable spoke is 7 millimeters. The rotor is 40 millimeters in diameter. The fan weighs a mere 110 grams.
The impeller resembles the one of the Revoltec Dark Grey except that the edges are slim and sharp and not so curved here.
Take note that the Scythe Kama PWM is the only fan in this review to have bushings in the mounting holes. These bushings make it impossible to install the fan on a heatsink with wire fasteners that are attached to the interior of the frame. On the other hand, it is easier to install silicone pins into these holes if the pins are long enough.
The rotation speed of the Scythe Kama PWM is, as its name suggests, PWM-controlled within a range of 310 to 1200 RPM. Depending on the speed, the fan is able to produce an air flow of 12.4 to 52.7 CFM at 0 to 24.9 dBA of noise. Its sleeve bearing has a service life of 30,000 RPM which isn’t long compared to the Kama Flow 2, but normal for that type of bearing.
The maximum power consumption of the Scythe Kama PWM was only 0.83 watts in my tests, only half the declared level. Its start-up voltage was 7.9 volts. Its 4-wire cable is 295 millimeters long.
Here are the test results of this fan:
Unfortunately, the Kama PWM is not as good as the Kama Flow 2 as it only stays comfortable until 1060 RPM. It is more or less quiet at 910 RPM or lower. This model doesn’t seem quiet subjectively, either. The airflow results are below average, so the Kama PWM is no more than just satisfactory.