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 Post subject: Motor noise in S-Flex D
PostPosted: Mon Feb 23, 2009 5:20 pm 
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Joined: Wed Sep 28, 2005 10:07 pm
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Location: Israel
I bought an S-Flex D 120mm 800rpm fan to replace the stock Antec Tricool fan in an Antec case.

It is quieter than the Tricool @ low but not by as much as I thought it would be. It has a noticeable low-frequency bearing noise that is much louder than the noise of the airflow alone. In a quiet room, I can hear it from 2m away. Undervolting only helps a little but the noise remains loud and dominant.

This is my first S-Flex fan so I'm not sure if this kind of noise is common to this series. I also have a Kama Flex 92mm 1600rpm fan which uses the same bearing type but doesn't make the same noise and is inaudible to me at ~800rpm.

The fan otherwise seems in perfect working order and the motor sounds healthy and doesn't click. Any idea if I my sample is normal or bad?

Thanks


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PostPosted: Mon Feb 23, 2009 6:01 pm 
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Location: North Carolina
I think something is wrong. I have several 800 rpm S-Flex's and they do not have the motor noise that you described. I can only hear it when I'm right next to my system. (~30cm)


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PostPosted: Mon Feb 23, 2009 7:22 pm 
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Thanks. That may be another face of the QC issues that others had with this model (I recall reading about clicking). I might give the S-Flex another go with the F model because it starts reliably at 5V. I originally chose the S-Flex over the Slipstream for longevity because I am still not sure what to make of the sleeve bearing and relatively short life expectancy of the Slipstream. The last thing I'd want is the fan stalling 3 or 4 years from now because the bearings were worn out, but then again people have been running them with no issues so far.


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 Post subject:
PostPosted: Fri Feb 27, 2009 4:53 pm 
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I can't even get my S-Flex D to start with 7V. How about you?

Once I feed it higher volts to start, I can lower it down.


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PostPosted: Mon Mar 02, 2009 8:10 am 
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Location: Israel
I can't tell exactly because I used a Fanmate but yes the starting voltage is high for this model. SPCR found it to be 8.9V here.


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 Post subject:
PostPosted: Mon Mar 02, 2009 8:34 am 
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Joined: Tue Dec 13, 2005 1:08 pm
Posts: 1407
Location: Michigan
line wrote:
Thanks. That may be another face of the QC issues that others had with this model (I recall reading about clicking). I might give the S-Flex another go with the F model because it starts reliably at 5V. I originally chose the S-Flex over the Slipstream for longevity because I am still not sure what to make of the sleeve bearing and relatively short life expectancy of the Slipstream. The last thing I'd want is the fan stalling 3 or 4 years from now because the bearings were worn out, but then again people have been running them with no issues so far.

I have a noisy S-Flex "F".

I recommend the Global Win NCB fans. I have three of those and all are excellent. All three cost less than the one S-Flex. They are only ~1300 rpm, so the "F" does gives better cooling at 12V.


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 Post subject:
PostPosted: Mon Mar 02, 2009 9:09 am 
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Joined: Fri Nov 21, 2008 6:55 am
Posts: 39
Location: New York
QuietOC wrote:
line wrote:
Thanks. That may be another face of the QC issues that others had with this model (I recall reading about clicking). I might give the S-Flex another go with the F model because it starts reliably at 5V. I originally chose the S-Flex over the Slipstream for longevity because I am still not sure what to make of the sleeve bearing and relatively short life expectancy of the Slipstream. The last thing I'd want is the fan stalling 3 or 4 years from now because the bearings were worn out, but then again people have been running them with no issues so far.

I have a noisy S-Flex "F".

I recommend the Global Win NCB fans. I have three of those and all are excellent. All three cost less than the one S-Flex. They are only ~1300 rpm, so the "F" does gives better cooling at 12V.


Where are you getting the Global Win fans so cheap?

_________________
Antec Solo | AMD Athlon X2 BE-2400 | MSI K9A2 Neo-F (AMD 770) | Xigmatek S1283 (passive) | Gigabyte ATi Radeon HD 4550 (passive) | 2x1GB Corsair XMS2 PC2-6400 | 2x1GB Crucial Ballistix PC2-8500 | WD20EADS | WD10EADS | Corsair 520HX | LG GGC-H20L | Globalwin 120mm exhaust, 2 x Globalwin 92mm intake on Silverstone FP33, all at 5v
Might not seem impressive, but inaudible to me!


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 Post subject:
PostPosted: Mon Mar 02, 2009 9:54 am 
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Joined: Tue Dec 13, 2005 1:08 pm
Posts: 1407
Location: Michigan
nyonya wrote:
Where are you getting the Global Win fans so cheap?

I ordered them 3 years ago from SVC for $5.99 each. It doesn't look like they are currently stocking them, however. :(


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