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YesBuy.net has the Yate Loon 120mm Clear Case Fan with Four Blue Leds D12SL-124B for $9 - $4 code ycm100406070611 = $5 with free shipping. This fan has a decibel rating of 28dBa and an airflow rating of 47 CFM. [BizRate]
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It is $5.49 not $5.
Any one use this before. How are they? Thank you in advance for your info.
I don't have this -particular- model, but the D12SL model in several flavors (black, orange, translucent, sometimes re-branded as Nexus) has been a favorite of the low-noise PC crowd for some time now...
Unless the LED's in this one are mounted in a way that allows them to produce a vibration/buzz, I'd expect these should be no slouch, either...
-lunk-
#2:
Thank you for your info. I am thinking this fan and also the cooler master R4-L2S-122B-GP 120mm fan. The cooler master one produce 39.77 CFM air at 19.3dB. And I just have no idea how loud the 28dB compared to 13 BTW, I am not sure the dB rating are correctly reported.
I purchased this fan, sans lights, for my nice new Inwin case that had a 80 mm intake fan, 120 mm exhaust fan, and a 140 mm PS fan. I obsessively believed that I would reduce some of the sound emanating from the case even though the loudest thing in the case was a 10,000 RPM 150 GB Western Digital Raptor hard drive. I had a difficult time determining how to mount this fan because the airflow was so weak. It spun at about 575 rpm compared to 1100 for my old fan. According to Intel Motherboard Utilities the temperatures on my Intel DG 965 WH motherboard went up about 10% with the I/O Controller Hub rising nearly into the yellow zone. My last PC was a proprietary small form factor and I was constantly screwing around with the fans. I have reached a conclusion that published specifications are nearly worthless. For almost any decent fan, the sound is directly proportional to airflow.
#4: Maybe you should use the 4 pin connector and hook up directly to power supply. That way the fan should run at full speed at around 1150RPM.( not 100% sure about the number). That might solve your temp. problem. However- as you mentioned sound is directly proportional to airflow. So that should reach the 28dB noise level.
Most of the quiet fans now means low RPM fan and useless. However high RPM fan like Delta 120mm 3700 rpm Case Fan ( model AFB1212SHE )- The noise level is 53db and 151 CFM. You might barely hear how your speaker sounds.
28 dB is not that quiet. You will still hear some fan noise.
25 dB is the threshold for detecting fan noise.
Remember every 3 dB increase equals doubling the noise.
These produce more vibration than the black or orange framed Yate Loons, the plastic is more rigid and it makes a difference.
Yate Loon is a low end crap fan manufacturer, if you run them at low RPM you might get reasonable life but nowhere as long as better fans.
As #6 mentioned, they are not silent, you will still need a fan speed reduction method to achive a very quiet PC, and with similar fan speed reduction methods you can similarly quiet down higher quality fans too. What this fan has going for it is primarily that it is cheap, especially w/free ship, BUT if you were ordering other parts elsewhere, you might be able to get a higher quality fan for about same price when shipping cost is distributed as % cost of each item instead of for a single fan.