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Akasa Silent Color 140 mm

Akasa is one of the largest fan makers out there; they currently offer over 60 models of fans of different size and application. We managed to get three fan models for our today’s roundup. We would like to start with Akasa Silent Color fan of 139x139x25 mm size. This fan comes in a light-blue cardboard box with a large cut-out window in the front:

The back of the box shows the exact fan dimensions and distance between the retention holes, and also lists all the fan technical specs. Akasa Silent Color comes with four long shock-absorbing spindles and a cable with a PATA power connector:

This fan has 7 blades and a rotor with 45 mm diameter. Its distinguishing feature is acid-blue color of the fan blades and a holographic spindle sticker:

The blades are of pretty common shape, they expand from the beginning towards the tip. They are larger than the blades of a 120 mm fan, of course. Four supporting rods holding the fan cannot boast small size or aerodynamically effective shape:

 

The fan works at 1000 RPM. The airflow at this rotation speed is claimed to be 47.1 CFM – higher than by 120 mm Akasa fans working at higher rotation speeds. However, the static pressure is way lower and is declared to be only 0.700 mmH2O. The noise is expected to be quite moderate: around 19.5 dBA.

The peculiarity of this particular fan model is its ability to fit into the slots designed for 120 mm fans. That is why the frame has additional retention holes in it (for 115, 120 and 125 mm slots):

According to the marking, the fan was made by Young Lin Tech Co. LTD:

The sleeve bearing inside should last at least 20,000 hours without failure. This fan should consume no more than 1.4 W of power. The latter spec can be easily confirmed on our testbed:

The manufacturer reported the power consumption absolutely correctly and the fan turned out really economical, but the airflow is a little too weak even for a 120 mm Akasa fan, not to mention the best fans tested today. The fan doesn’t produce too much noise, it remains acoustically comfortable at 630 RPM. We didn’t detect any parasitic noises from the fan motor. Its startup voltage is pretty high - 10.5 V.

 
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