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Noctua > 
Item#: 9SIA0AJ3U50129

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Succeeding the vastly successful NF-S12, the NF-S12B is a next generation quiet fan featuring Noctua's advanced SCD2 technology as well as a highly optimized blade geometry with Beveled Blade Tips that improves its award-winning predecessor's airflow efficiency by up to 10%. Topped off with Noctua's time-tested SSO-Bearing and versatile 1200/900/600 rpm speed settings, the NF-S12B FLX is a premium quality fan that offers full flexibility in quiet to ultra-quiet case cooling.

  • newegg Highly Optimized Impeller with Beveled Blade Tips Thanks to its further refined blade geometry with extended leading edges and Beveled Blade Tips, the NF-S12B achieves up to 10% more airflow and static pressure than its much acclaimed predecessor at the same noise level.
  • newegg 3 Speed Settings for Full Flexibility Providing 1200, 900 and 600 rpm speed settings via the supplied Low-Noise and Ultra-Low-Noise Adapters, the FLX (Flexibility) version can be fine-tuned for superior airflow or maximum quietness.
  • newegg Smooth Commutation Drive 2 The latest version of Noctua’s advanced SCD drive system ensures superb running smoothness by eliminating torque variations and switching noises.
  • newegg SSO-Bearing Noctua’s time-tested SSO-Bearing technology has become synonymous with supremely quiet operation and exceptional long-term stability.

Learn more about the Noctua NF-S12B FLX

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 6 years
  • Limited Warranty period (labor): 6 years
  • Read full details

Customer Reviews of the Noctua NF-S12B FLX

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  • Richard C.
  • 12/31/2015 8:58:30 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsWoth the $

Pros: Much quieter than the case fan that came on my CM Case. I only have one case fan, rear exhaust, and replaced it with this fan at the same time I replaced the CPU Fan with the NF-P12. System is dead quiet. It moves lots of air, and keeps my system a slight bit cooler than the stock fans.

Cons: None

Other Thoughts: Well worth the higher price tag. I will buy more in the future and add more case fans. I should have got more while they were on sale! I've been kicking myself for that.

Did you find this review helpful? Yes No

  • Michael P.
  • 1/7/2014 5:05:46 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggs

Pros: Quiet, multiple options for voltages and therefore decibel level

Cons: Poor documentation to indicate which adapters are which. It comes with a 5v and 7v adapter, and runs 12v without adapter. However, I had to find this out on line.

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  • Philip K.
  • 12/3/2013 1:21:11 PM
  • Ownership: more than 1 year

5 out of 5 eggsTop of the line case fan

Pros: Top notch. Very quiet. Performs very well. Rubberized sleeved power leads. Screw less mounting hardware. Impressive packaging.

Cons: Expensive

Other Thoughts: The colors may or may not be a con. I have 4 of these, 3 doing pull work on a 360mm radiator and one push elsewhere in my case.

Quiet. Very quiet for the amount of air they push.

Did you find this review helpful? Yes No

  • John A.
  • 9/28/2013 11:25:26 AM
  • Ownership: 1 month to 1 year

5 out of 5 eggsawesome

Pros: quiet like advertised. the different inline resistors included were very useful.

Cons: none. work great. should probably label the inline resistors better for the non technically inclined.

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  • Ronald B.
  • 8/24/2013 5:50:18 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggs

Pros: Nice! I usually buy Noctua when looking for a quiet fan. I have about six Noctuas in my computer cases over the past few years and never had a problem with any of them. Want to keep my computers quiet and they all seem to run as quiet as the day I put them in. I run all my Noctuas at the highest speed setting as they are quiet enough for me but you could use the inline adapters that come with the fans to quiet them even more if you want.

Cons: I know some people complain about the brown color of the fans but I, personally, don't care one bit what they look like.

The only very minor unexpected occurrence I had is when I installed this fan using the optional rubber fasteners that come with it. I pulled on a couple of them too hard and the top of the rubber fastener stretched and broke off. The fans still stayed in place, though, so no harm done. I have put in a few other Noctuas using the rubber fasteners and never had any other breakages. Perhaps a little KY jelly (or spit) on the rubber fasteners to lube them would mean less pulling strength required because they will slide into place easier due to less frictional resistance.

Other Thoughts: Just make sure you get a Noctua with the "3 speed setting" option in case you are looking for the quietest fan possible.

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  • Charlotte B.
  • 6/4/2013 3:13:08 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsPerfectly Quiet - Excellent Quality

Pros: - It's quiet - really, not just "quiet series", its quiet
- I find the voltage adapters to be useful since a fan controller is not an option for me.
- Quality of the fan in excellent. I have purchase other bands and this is by far the best fan you can buy.

Cons: None

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  • John A.
  • 4/23/2013 2:08:19 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsStill Going

Pros: 1. Moves lots of air
2. Quiet without inline plugs at 1200rpm

Cons: 1. Color
2. Kind of expensive

Other Thoughts: Purchased a couple of these on 10-31-2009 and they are still running
Expensive but they are durable

2 out of 2 people found this review helpful. Did you? Yes No

  • Russell B.
  • 3/26/2013 5:38:47 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat Fans!

Pros: Super quiet, great quality, nice craftsmanship

Cons: none

Other Thoughts: Noctua rules!

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  • Daniel M.
  • 2/15/2013 7:58:09 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsExcellent, very quiet

Pros: These are now the only fans I buy. Includes cables for three max speed settings. Mine are spinning slow and the case in nice and cool.

Cons: none

Other Thoughts: Some people don't like the color of these fans. If the color of the fan matters, there are lots of alternatives, but the performance is unmatched.

After using these 120mm fans, I ordered some 80mm fans for use as replacements in the recording studio where I work - they're that quiet.

1 out of 1 people found this review helpful. Did you? Yes No

  • David M.
  • 1/28/2013 6:25:45 AM
  • Ownership: 1 week to 1 month

5 out of 5 eggsSilent

Pros: Silent using the U.L.N. adapter # 600 R.P.M.
Solid construction.
Best fan on the market.

Cons: None

Other Thoughts: I bought this fan for additional cooling of the NH-D14, even though it is not purpose specific for that, whereas the NF-P12 fan is. The reason is that the NF-S12B slightly quieter at the slowest R.P.M.

The NFS12B facing is thicker and required drilling of each hole to countersink the OEM tabs so that the wires that attach it to the cooler would fit. Easily done and I am highly satisfied with the results.

2 out of 2 people found this review helpful. Did you? Yes No

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Item#: 9SIA0AJ3U50129
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