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Nine Blade Design

The NF-S12B sports a further refined version of the original NF-S12ís Straight-Blade-Design that broke new ground in the realm of quiet PC cooling in 2006 and quickly became renowned for its excellent airflow/noise ratio, making the NF-S12 one of the last yearsí most successful fans in the PC cooling market.

Building on the proven basis of the award-winning NF-S12ís impeller, the design goal for the NF-S12B was to further improve its predecessorís much acclaimed airflow/noise ratio and to increase static pressure in order to allow for a broader range of application. These goals have been achieved by reducing the tip clearance at the leading edge and adding Bevelled Blade-Tips, a feature first introduced with the NF-B9 92mm fan.

NF-S12B Blade Design


Reducing the tip clearance by increasing the length of the blades allows for a bigger blade surface area as well as improvements both in airflow and static pressure. This measure though tends to come at the expense of increased noise emission due to critical rotor-stator interaction. For the NF-S12B, this issue has been dealt with by only increasing the length of the blades at the leading edges and adding a bevelled structure (Bevelled Blade-Tips). By increasing the distance between the impeller and the frame at the outermost areas of the fan where the impeller achieves the highest velocities, Bevelled Blade-Tips help to reduce critical rotor-stator interaction. As a result, the NF-S12Bís modification of the original NF-S12 blade geometry combines the benefits of a reduced tip clearance with those of a bigger distance between the tip of the trailing edge and stator parts, achieving up to 10% improvement both in airflow to noise and pressure to noise ratio.

NF-S12B Blade Design


NF-S12B Blade Design


At 1200rpm, the NF-S12B FLX produces 18% more airflow and 14% more static pressure than its predecessor at 1300rpm. Running at 100rpm slower, the NF-S12B is almost 1dB(A) quieter at the same time!

NF-S12B Blade Design


At 700rpm, the NF-S12B ULN produced 13% more airflow and 16% more static pressure than its predecessor. Despite of this impressive boost in performance, the NF-S12B runs just as quiet as the NF-S12!

NF-S12B Blade Design





Noctua
23.07.2014 - The Mod Zoo NF-F12 industrialPPC-3000 PWM
Test verdict: "I give the Noctua Redux and InustrialPPC fan lines five golden nanners for fantastic quality, renowned design and giving the nod to enthusiasts with appealing colors!" (Bill Owen, The Mod Zoo)
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23.07.2014 - ReviewTech.co.uk NH-D15
Test verdict: "The Noctua NH-D15 is an excellent, if not the best product currently available in the air cooling category" (Andrew James, ReviewTech.co.uk)
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21.07.2014 - RealHardTechX.com NF-S12B redux-1200 PWM
Test verdict: "En definitiva, un producto absolutamente recomendado." (Josť Romero, RealHardTechX.com)
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21.07.2014 - bcchardware.com NH-U12S
Test verdict: "Noctua has set the bar pretty high for themselves, and like usual, they've been able to live up to their legacy with the NH-U14S and NH-U12S CPU coolers." (Jason Schneider, bcchardware.com)
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