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Home Scythe S-FLEX SFF21D / 120mm 800rpm Fan | |
|  | |  | | | Scythe S-FLEX SFF21D / 120mm 800rpm Fan | | | | | SKU:
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Usually ships in 1-2 business days | | | | | | Introducing the high quality quiet 12cm fan with patent pending FDB (Fluid Dynamic Bearing) technology. This "Fluid Dynamic Bearing" technology from SONY Corporation can provide a dramatic reduction in fan noise and prolong the life of your fan. Click on the image of the product to find out more info! | | | |
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| $12.90 | |
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| | Product Details | | Package Length: | 7.8 inches | | Package Width: | 5.1 inches | | Package Height: | 1.2 inches | | Package Weight: | 0.6 pounds | | Average Customer Rating: |  based on 6 reviews |
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| | Features | Equipped with Genuine S-FDB* BearingMarket Leading Low-Noise LevelOutstanding Long Life of 150,00 HoursAnti-Shock Ability
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| | Customer Reviews | Average Customer Review:
Write an online review and share your thoughts with other customers.
 Quiet fan moves a lot of air Mar 11, 2010
I replaced an aging 120mm fan with the Scythe S-Flex and am loving it. Where my case used to hum like a lawnmower, it's almost inaudible now, yet I have not measured any significant changes in operating temps.
I am a believer in the importance of managed airflow in a case - move the air in through the front, out the back and make sure that your wires, ribbon cables, etc, are not blocking airflow and that your case is not filled with dust or pushed right against a wall.
 False Advertising? Feb 12, 2010
The manufacturer of this fan claims it puts out 33.5 CFM at 8.7 dBA. When I ran the fan unmounted (no air flow restrictions or vibration points), the air flow on my hand was noticeably less than either of the two fans on my Antec Two Hundred case (120mm rated at 30.1 CFM at 900 rpm, which is low speed and 140mm rated at 33.6 CFM at 800 rpm, also low speed). When I compared fan noise from the Scythe to the fans on the case (120mm rated at 16.9 dBA and 140mm at 21.8 dBA, both at low speed settings) and the Scythe wasn't any quieter than the Antecs (curiously the 140mm Antec fan sounds a bit quieter than the 120mm Antec). Both of the Antec fans were mounted in the case, blowing through a grill and I was able to turn them on and off as needed.
When mounted on the case side, the Scythe was noticeably louder than the Antecs and air flow was slightly reduced. When I put a filter over the fan, air flow went way down to an unacceptable level (I could barely feel the air moving). Sound levels were reduced back to where they were before mounting the fan.
I bought a couple of Thermaltake Pure Silence 120mm fans from my friendly neighborhood Fry's Electronics (for only slightly more than the Scythe) to mount in the front of my case. These puppies are rated at 800rpm to 1300 rpm, controlled by an attached variable speed controller. The manufacturer does not list air flow at 800rpm but shows 58.3 CFM at 1300rpm. I ran one fan unmounted anjd compared it at various speeds to the two Antecs and the Scythe. Starting at low, I was able to crank up the speed by about one third of the adjustment before the fan sounded as loud as the Antecs. Air flow was very noticeably stronger than the Antecs at this point. Once I mounted the fans to the case (they pull through a large filter), I adjusted the speed until the sound levels were equal to the Antecs. Using my highly technical hand test, air flow from the fans was still slightly greater than from the Antecs (again, I was able to isolate fans for testing).
Since I seriously doubt Antec and Thermaltake would underate a product, Scythe's 8.7dBA and 33.5 CFM ratings are highly questionable. Granted my tests were very imprecise but there were sufficient differences between fans to suggest the Scythe does not live up to its claims. I am going to keep the Scythe since I do not want to go through the hassle of returning it (especially if I have to pay for shipping and/or a restocking charge) but I'm going to pull it off my case and replace it with another Thermaltake.
Overall, I'm very disappointed with this fan when compared to others, especially considering their claims.
VERY QUIET!!! Oct 11, 2009
Very, Very quiet. In fact the quietest case fan I have ever used. EVER!!! There is no audible noise when it is on. It may not push a lot of air so if cooling is a priority you may want to choose a different fan. I am not a serious gamer. I use my computer for video applications so noise, or the lack of it, was a major priority for me. After experiencing this fan I might just replace my other 2 - 120mm fans with this one. The manufacturer rates the longevity at 150,000 hours. The price is right at Amazon and I received my fan in less than a week with the least expensive shipping method. ( I Loved this fan so much I bought 2 more a few weeks later)
My Favorite Fan for Low Noise Jan 28, 2009
I'm very sensitive to noisy fans, so this 800rpm Scythe fan is my favorite so far. I use it to replace the noisy 3-speed fans in Antec cases. No clicks or noise of any kind from this fan; only the sound of a small amount of moving air.
To make up for the small amount of air movement, I use a huge fanless heat sink on the CPU (Scythe Ninja is expensive but good). This works well as a conservative design with a 45nm dual-core CPU in a case large enough for the 120mm fan and a huge heat sink.
2 of 2 found the following review helpful:
 Very quiet, but reliable?? Aug 15, 2007
I have had two of these in a Cooler Master Centurion Minitower for about 6 months now. For the last few months, the Scythe I have on my CPU heatsink has failed to start on bootup. It starts to spin, but ends up simply stopping. A quick spin with the finger gets it going, but who wants to open their case every time they turn their computer on? This fan has an extremely high startup voltage (8.9v!), which I think is the problem. I have the fan cable going to a Zalman Fanmate controller, which may increase the required startup voltage even higher. For reliablity's sake, I recommend picking up the "E" version which runs at 1200rpm, and only requires 4.8v startup voltage. Every scythe fan is a great sound performer, so you will still be happy with how quiet in runs!!
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