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Best Fan For upside down mounting.

post #1 of 7
Thread Starter 
I have a top fan in my computer and I believe the bushings are going bad in it cause when I start my computer it has a ticking sound. It turns out that the fan has a bad wobble and hits its own mounting bracket. So, I am looking for a 140mm fan that is able to run upside down (pulling air from inside case and blowing it out).

My fan setup is three 120mm intake fans in the front (full power all the time) and 140mm top exhaust (full power all the time) by 120mm rear exhaust fan (MOBO variable speed). Also, all the case fans are what came with my Rosewill case.

Thanks in advance.

P.S. Fan should either be Blue LED or Black. Also, should I add a better 120mm fans in the front to bring in more air flow.
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post #2 of 7
Aerocool Shark Black Edition 140mm
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post #3 of 7
Thread Starter 
That AeroCool fan looks like a pretty good fan. But what are your thoughts between;

Phanteks PH-F140SP_BK_BLED 140mm Blue LED Case Fan $14.39
http://www.newegg.com/Product/Product.aspx?Item=N82E16835709024

AeroCool Shark 140mm Black Edition 140mm Blue LED Case cooler $14.39 + $1.99 Shipping
http://www.newegg.com/Product/Product.aspx?Item=N82E16835129058

COUGAR 14CM Blue LED Hydraulic (Liquid) Bearing Ultra Silent Fan 1000RPM, 73.2CFM, 18dBA $20.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16835553015
Edited by fishinfiend - 3/23/14 at 8:26am
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post #4 of 7
Thread Starter 
Sorry changed my mind about the aerocool fan cause in one of the recent reviews, the reviewer said that both of the fans started to wobble and make noise which I don't want. Even though a few days prior he said they where great.

Would a ball bearing or a bushing fan hold up better in a horizontal over a fluid?
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post #5 of 7
Double Ball bearing is more tried and true but it sometimes creates more mechanical noise at low RPM than a well designed fluid dynamic / hydrodynamic bearing (sometimes they're glorified rifle bearings so beware of that)

Thermalright TY-141 , Sanyo denki, and gentle Typhoons (with vibration dampening inside the hub) use dual ball bearing too

Cougar HDB (not turbine or Vortex regular) uses a true hydrodynamic bearing as shown by their licensing fees.


The Phanteks has what they market as "updraft floating balance" which is marketing speak
Quote:
Composed by MOSS and SSC systems, Phanteks’ UFB bearings have an effective hub-tip ratio to achieve a state of equilibrium reducing air and vibration noise. SSC provides an increase in the bearing’s lifespan and ensures that the fan’s axis is consistently operational and quiet.
^ Moss Motors' ball bearing? Stainless Steel Collar?
Hub to tip ratio is talking about the blade and hub size, nothing to do with bearings

From Phanteks HP picture

From Phanteks SP picture

From Phanteks XP


It looks like a magnet is used to stabilize it like Noctua's SSO / SSO2 bearing

See also http://www.hardwaresecrets.com/article/The-Truth-About-Fluid-Dynamic-Bearing-FDB-Fans/1807
Edited by AlphaC - 3/23/14 at 2:28pm
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post #6 of 7
Thread Starter 
Thanks for the info AlphaC. I just bought the 140mm Phantek fan for the top. Along with it I purchased a Cougar 120mm fan to try and bring in a little more airflow in from the front.
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post #7 of 7
I found this thread on accident, but I wanted to semi-necro it after having just bought a Phantek PH-F140SP. Short story is when upside down, as it pulling air up, it vibrates a lot. Pushing air down horizontally it still vibrates but not as badly. Vertically there is no vibration.

My Noctua NF-S12A's do not vibrate at all horizontally mounted or vertically, so in the future I'll go with their SSO2 bearing design.
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