Scythe S-FLEX 120mm 1200 rpm Quiet Computer Fan with 3-Pin and 4-Pin Connectors SFF21E

Scythe's S-FLEX 120mm 1200 rpm Quiet Fan is equipped with Genuine S-FDB (SONY Fluid Dynamic Bearings) made by SONY corporation.

This S-FDB technology drastically eliminates the friction between the bearing and the shaft, which makes this fan nearly inaudible to human ears. An additional suction magnet optimizes the magnetic force balance within the rotor to achieve absolute silence. To further achieve absolute silence, the fan is equipped with a Linear drive IC for reducing electromagnetic noise.

The Patent Pending "S-FDB" structure allows the fan to last up to 150,000 hours.

Conventional ball bearings rely on a point-contacting structure for rotation, which creates a situation where the ball bearing surface could be damaged, causing irregular noises. The S-FDB carries a surface contact mechanism for an improved anti-shock structure, which is five times stronger than the conventional ball bearing.

This fan comes equipped with a 3-pin connector. A 4-pin adaptor is included.

Specifications

Fan size (edge to edge)	120 mm
Manufacturer	Scythe
Model	SFF21E
Air volume at Full Speed (12V), CFM ±10%	49.0
Noise level at Full Speed (12V), dB(A)	20.1
Fan speed at Full Speed (12V), RPM ±10%	1200
Power consumption, W	1.20
Weight, g	175
Approximate cable length, cm	30
Life expectancy @ 25°C continuous use	17 years
Power connector	3-pin, 4-pin
Bearing type	S-FDB
Accessories	None
Mounting hardware included	Screws
Fan depth	25 mm
Rated voltage	12 VDC

If you decide to use more than one case fan in your PC, it is generally good practice for every fan that you have sucking air into the case (usually at the front), you should have another one blowing it out (usually at the rear), in other words, one exhaust fan for every inlet fan. The role of a fan is easily determined by which way around you decide to mount it, since the fans are symmetric and reversible.

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