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Scythe S-FLEX SFF21F 120mm Case Fan

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  • 120mm
  • 1600 RPM 63.7 CFM
  • S-FDB (Fluid Dynamic Bearing by SONY Corporation)

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Scythe S-FLEX SFF21F is equipped with the high quality quiet 12cm fan with 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.

  • newegg S-FDB Bearing The Scythe S-FLEX SFF21F features SONY Fluid Dynamic Bearing (S-FDB) to delivers enhanced airflow, low operating noise level and up to 150000 hours MTBF. And S-FDB provides improved anti-shock structure which is stronger than conventional ones.
  • newegg High Performance Operating at 1600 RPM, the Scythe S-FLEX SFF21F delivers strong air flow of up to 63.7 CFM for impressive levels of heat dissipation.

Learn more about the Scythe USA S-FLEX SFF21F

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: 1 day to 1 week
Verified Owner
1/ 5
Clicking noise

Pros: Looked promising on the box

Cons: I bought 12 of these fans to replace all my case fans and 6 fans for my radiator. I have a fan controller to control the speed of the fans and cannot run these below 12v without motor whine. These fans are not that quiet at 12v and need to be toned down slightly, but am unable to do it because the motor whine is just as loud as the fan on full blast.

1 out of 2 people found this review helpful. Did you?
5/ 5
Good ones

Comments: I have 2 anf they've been running fine nearly 24/7 for two years with no issues at all

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Ownership: more than 1 year
Verified Owner
5/ 5
Still Running Strong (update)

Pros: Very quiet, smooth, nice flow, nice construction

Cons: absolutely nothing...

Other Thoughts: Bought 3 of these in January of 07, they have been running almost nonstop since then, and have had absolutely no problems with them

1 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Still running

Pros: These fans are still running and are still extremely quiet after almost a year. I will be replacing some "existing" fans, that came with the case, shortly. The replacements with be Scythe.

Cons: I had to mount them on the outside of the case. My thermaltake Heatsink is huge!

Other Thoughts: You can review my components under SSD MACHINE in the public wishlists.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Great fan

Pros: Quite. Well made. Moves a lot of air.

Cons: None that I can think of so far.

Other Thoughts: The only real noise made by this fan is the air movement. If you are in a very quite room there is a fair amount of noise from the air but I have not heard any noise from the fan at all.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
decibels schmecibels

Pros: It's just a fan, so why get excited about it, right? Wrong! I had an old, cheap no-name case fan that put out impressive airflow, but was so loud that it made the cicadas outside seem silent.
I built a new system and decided to "splurge" on nice fans, and Wholly cow! I can actually hear other sounds again! <Newegg didn't think the proper spelling was appropriate???>
Seriously these are super quiet, and they out-perform my house fans (ounce for ounce, that is). They're black--very classy in an all-black case, and they feel very solid.

Cons: Wish it came with sleeved cables, but that's nothing.

Hey Scythe, could you make one of these in a 50mm size? yeah, it's not common, but the ASUS Sabretooth P67 has a hole in its armor with your name on it.

Other Thoughts: I have 2 of these on my Corsair H70 cooler, and I can't even hear them. I decided to get 2 more to replace the stock intake and exhaust fans on my case. Do it right and buy as many as you need all at once, since Newegg is currently offering a discount for purchasing multiples.

The moral of the story: don't sweat the cost of your fans. They're not even 20 bucks so go crazy!

2 out of 2 people found this review helpful. Did you?
Ownership: 1 day to 1 week
5/ 5
nice

Pros: pretty darn quiet...bought this after finding some reports on case fans. Used this to replace an old Thermaltake fan that came with my box. BIG improvement considering this is for an audio worksation

Cons: it's not silent

Other Thoughts: worth it imo

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Ownership: 1 month to 1 year
Verified Owner
2/ 5
Tremulous

Pros: high air flow

Cons: Way too noisy for me. There's a noticeable whine coming from the fan that reminded me of a hair dryer.

Other Thoughts: I couldn't stand the sound (although I am psychotic about fan silence). Currently sitting in my garage, being used as a fan-hole template

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  • New : This means the product will ship as received by the manufacturer, sealed, with all advertised components, and with the manufacturer warranty.
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  • Used - Like New : This means that the product has been opened, possibly used but is in perfect condition with no signs of cosmetic or functional defect. Product may includes warranty, and accessories found with the original product. Product may or may not be in the original packaging. Returned items with minor packaging defects fall under this category.
  • Used - Very Good : This means that the product has been opened, may show slight signs of use and cosmetic blemish, and may be missing minor accessories, but remain in excellent condition. Product does not come with warranty unless stated otherwise in product description.
  • Used - Good : This means that the product has been used, may show clear signs of use and may be missing minor accessories, but remain in good condition. Product does not come with warranty unless stated otherwise in product description.
  • Used - Acceptable : This means that the product shows clear signs of use, cosmetic defect, and may be missing minor accessories and manual, but remain in working condition. Product does not come with warranty unless stated otherwise in product description. Functionality issues beyond signs of use should be disclosed in product description.
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