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Scythe S-FLEX SFF21F 120MM Cooling Fan 1600RPM 28.0DBA 63.7CFM FDB

This product can only be exchanged or replaced with the exact same item.
Scythe S-FLEX SFF21F 120MM Cooling Fan 1600RPM 28.0DBA 63.7CFM FDB - 1
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Reg. Price: $19.98  CAD
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SKU: 17749
Shipping Weight: 0.5lbs

Part #: SFF21F

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Product Videos [ Edit ]

Features [ Edit | History ]


S-FLEX Case Fan he 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.

Quick Specs:
Air Flow 1 x 63.7 CFM
Application/Usage Case
Package Contents
  • S-FLEX Case Fan
  • 4-pin Adapter
Connectors 3-pin TX3
Fan Diameter 1 x 120 mm
Fan Speed 1 x 1600 rpm
Fan Bearing Type Fluid Dynamic Bearing
Height 4.7"
Width 4.7"
Depth 1"
Number of Fans 1

Specifications [ Edit | History ]

Fan Information  
     Air Flow: 1 x 63.7 CFM
     Fan Bearing Type: Fluid Dynamic Bearing
     Fan Speed: 1 x 1600 rpm
     Number of Fans: 1
General Information  
     Brand Name: Scythe
     Manufacturer: Scythe Co., Ltd
     Manufacturer Part Number: SFF21F
     Manufacturer Website Address:
     Product Name: S-FLEX Case Fan
     Product Type: Cooling Fan
     Connectors: 3-pin TX3
     Application/Usage: Case
     Package Contents:
  • S-FLEX Case Fan
  • 4-pin Adapter

Physical Characteristics  
     Depth: 1"
     Fan Diameter: 1 x 120 mm
     Fan Location: Side
     Height: 4.7"
     Width: 4.7"
Power Description  
     Input Voltage: 12 V DC

Customer Reviews of Scythe SFF21F

Product reviews on are screened for relevance and inappropriate content. Reviews may contain inaccurate information about the product. If there is a discrepancy, please use the Flag this Review link located beside each review. Reviews are not an endorsement expressed by, but opinions from customers based on their own experience with a product. We do not recommend you make purchasing decisions based on facts or opinions expressed regarding Scythe SFF21F reviews.
Experience: 5 Weeks


good coolingn
Cons none


works great

Experience: 6 Months


great cooling fan, drops temps more than other expensive fans, great investment, would buy again
Cons none


great cooling fan, drops temps more than other expensive fans, great investment, would buy again, have no complaints what so ever

This review was modfied by poster @ 01-16-12 05:04 PM

Experience: 1 Days


Good airflow,Robust construction,Quiet
Cons none for the momment


If it was a little quieter and less expensive, i probably replace all my fan in my case with these. Awesome product scythe quality :)

Experience: 2 Weeks

Verified OwnerVerified Owner


- Good compromise between airflow and noise.
Cons - None.


I got this to supplement the stock cooling on my Cooler Master 690 II Advanced case. I found it pretty quiet, with only a very small change in the overall noise level of the system. Depending on system load conditions and ambient temperature, this lowered my case temp by 3 to 8 degrees. It is still quiet enough that I could sleep in the room next door.

While airflow is not the best in the world, this offers a good compromise between airflow and noise level.

Experience: 2 Weeks


Good Price
Moves a lot of air.
Cons None


Got this fan to use in a puch/pull on Coolermaster Hyper 212 cooler. it does an excellent job at moving the air. I noticed that the stock cooler has an almost unbearable whine at anything over 1500 RPM, so had to change MB settings to keep it below that. AMo going to order another of these to swap out the original.

Experience: 1 Months

Verified OwnerVerified Owner


-nice airflow
-long life
Cons -price


Installed in my antec 1200 case to increase airflow. Works as intended and is quiet. Wish it were abit more cheaper though.

Experience: 2 Weeks

Verified OwnerVerified Owner


* Moves Air Well, And Quietly
Cons None Noticed Thus Far.


I purchased 2 of the fans as intakes in my Antec 300. Thus far they have performed well, though I would expect no less after only 2 weeks of operation.

Regarding noise, I can absolutely hear a difference in overall noise when these are running vs not running. It still doesn't disturb me, I'm just saying I can certainly hear a difference.

Experience: 1 Years


High CFM
Long life
Low(ish) DBA
Cons Low static pressure


This fan pushes a lot of air and works great for circulating a case or on heat sinks which don't require much static pressure. This fan should virtually last forever so you shouldn't have to worry about replacing it for a few builds.

Experience: 9 Days

Verified OwnerVerified Owner


good for HSF
Cons price


good fan for heat sink fan, great static pressure, kinda loud but does the job on a thermal right extreme 120.

long life bearings as it stated, and i hope it does last a year.

one con would be the price.

Cannon Fodder
Experience: 8 Days

Verified OwnerVerified Owner


Quiet, moves a decent amount of air, high rated MTBF
Cons None so far....


Picked up this fan to add to my TRUE CPU cooler, to make up a push/pull setup, but wanted something to move a bit more air, so I replaced it shortly after.

As mentioned earlier, this fan does move a decent amount of air, while being fairly quiet, and another plus, is the large MTBF of 150,000 hrs., which, theoretically, should mean this fan will last a relatively long time, and quite possibly outlast many computer fans.

NCIX Forum Messages

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Messages about Scythe S-FLEX SFF21F 120MM Cooling Fan 1600RPM 28.0DBA 63.7CFM FDB

eta (Joel_M- Mar 13, 09, 0 Replies) Read this message
how will this run with the xigmatek? (EaGle1337â„¢ The fish- Aug 26, 08, 3 Replies) Read this message
This vs KazeJyuni (Redbeaver- Jul 06, 08, 23 Replies) Read this message
ETA on new stock (Christopher_S- Jun 02, 08, 1 Replies) Read this message
How loud Scythe? (Sen5es- Nov 13, 07, 6 Replies) Read this message
Does this work with fan controller? (Roger_C- Oct 22, 07, 1 Replies) Read this message
4 pin adapter (Garnet_A- Oct 04, 07, 5 Replies) Read this message
Back in stock ETA? (Andrew_H- Sep 27, 07, 7 Replies) Read this message
ETA? (MrDisco- Mar 01, 06, 2 Replies) Read this message

Post a New Message  |    All Messages       Browse NCIX Forums

Forum messages are not reviewed and may not contain accurate information about a product. Message contents are opinions from customers based on their own experience with a product. We do not recommend you make puchasing decisions based on Forum messages.

Reviews from the Web

Below are reviews found on other web sites for this product submitted by customers.

Comment: Small blurb about S-Flex fan included in the Thermalright Ultra 120 review. The Sony Fluid-dynamic bearing is the source of the low-noise.
Posted by: Erin_L @04/06/07
Submit a review link   |   Latest 30 reviews

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