Reduce the vibrations efficiently & silent operation
AERO-DYNAMICAL DESIGN
Air-inlet with optimal aero-dynamical design reducing noisy air turbulences
HYDRO-DYNAMIC-BEARING TECHNOLOGY
We defined HDB to Hydro Dynamic Bearing. An oil seal design that has a higher reliability and advantage than conventional fan motor design. 1. High revolution precision, low vibration noise 2. Fluid seal design provide extremely long life span 3. Surface tension effect, runs more smoothly with no friction, extremely quiet Fluid seal design is achieved through the use of oil surface tension and hydrodynamic pumping forces provided by grooves. Bend area is centralized oil and prevented oil leakage out of motor (oil leakage is main problem of sleeve bearing, short life time) . Friction between shaft and HDB will be down due to herringbone structure reaction(friction between the metal is disadvantage of ball bearing, noise & waste heat problem). So HDB conquer sleeve & ball bearing disadvantage to become more reliable & quiet technology for Top-notch fan. Such design concept is successful and applicative on HDD, and we can see a reliability application in it.
HDB, Ball, & Sleeve comparison
Sleeve
Ball
Hydro-Dynamic
revolution precision
mediocre
good
best
vibration noise
mediocre
loud
quiet
life span (hrs)
30,000
50,000
>150,000
waste heat
high
high
low
Cost
low
high
high
HDB Design Principles
Oil surface tension and hydrodynamic pumping forces provided by grooves, no friction, extremely quiet
Specifications
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- by David_W @Mar 05, 2012
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Messages about Cougar Vortex 120MM Hydro Dynamic Bearing Fan 800-1500RPM 70.5/119.8CFM 17.7DB PWM 4PIN Retail
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I got this to replace the stock fan on an A50 heatsink, which is 3-pin, no PWM, and control fan speed by a resistor cable at fixed speed of 1600 or 2000 rpm. This makes it louder than necessary for me most of the time.
Great fans, they cool better then stock H70 fans at full blast, stupid loud they are, these however are near silent full speed. They look amazing, great design. Packaging was very nice.. High quality looking for high quality product, a must buy..
(Read More)
Have 4 of these in push-pull on my H100 cooler. They're quiet (but not the H100 =<) and push tons of air... Bonus, they look super sleek inside an 800d case.
(Read More)
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