Noctua 120mm, 3 Speed Setting Anti-Stall Knobs Design SSO2 Bearing Case Cooling Fan NF-S12A FLX item description Product Features Make sure this fits. by entering your model number. The NF-S12A features the third evolution of Noctua's classic Straight Blade Design that has earned its S12 series countless recommendations from hardware journalists and enthusiasts around the world. The NF-S12A's Anti-Stall Knobs reduce flow separation phenomena in medium to high impedance situations n thereby increase the fan's stall margin, that is even more versatile than its renowned predecessor . Noctua's AAO (Advanced Acoustic Optimization) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency. Noctua's Stepped Inlet Design adds turbulence to the influx to facilitate the transition for laminar flow to turbulent flow, that reduces tonal intake noise, improves flow attachment, incur suction capacity, especially in space restricted environments. Integrated Anti-Vibration Pads made from extra-soft silicone minimize the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems. The latest version of Noctua's advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the NF-S12A remarkably quiet even at very close distance. Providing 1200, 900 and 700 rpm speed settings via the supplied Low-Noise and Ultra-Low-Noise Adapters, the NF-S12A FLX (Flexibility) can be fine-tuned for superior airflow or maximum quietness. The NF-S12A features the further optimized second generation of Noctua's renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilization, precision and durability. Additional information About Us Shipping RETURN About us Since 2005 we have been available to online customers, offering a variety of brand new products at great prices. All of our products ship directly from our different warehouses across the United States so you get your items quickly and in perfect condition. We know how important it is for you to get what you ordered and get it fast. Our products are a 100% authentic and brand new. We work with the biggest suppliers of high quality products to bring you only the best items. It is very important to us that we put our customers first and you will see this reflected in every transaction with us. We consider it a top priority that our customers are happy and in the rare event that they are not, we do everything we can to fix the situation. No customer will walk away from our store unhappy. If there’s a problem, just let us know and we fix it. We guarantee you only the best experience when shopping with us! Shipping Our stock all ships from our US-based warehouses. Shipped via USPS or UPS (depending on location and package weight) Unless stated otherwise, all orders will ship within 24 hours of your payment being processed. Check our feedback to see the great reviews of FAST shipping we offer. Shipping is always FREE! RETURN We offer a 30 day return/exchange policy for our products. You can choose refund or exchange if you are dissatisfied for any reason with your product. When returning an item, it must be in all of the original packaging and include all of the original accessories or items that came with it. The item and package should be in original and perfect condition. You will be required to cover shipping on the return of defective items. All returns MUST be done within 30 days of date of purchase. Please note that we cannot give refunds or replacements after the 30 day limit has expired. When sending in a return, please note that it can take up to 7 business days for the return to be processed. We do our best to process as quickly as possible. Buyers outside the U.S.A please note – ALL of our electrical appliances sold in our store are 110-120V. Return policy for buyers outside the U.S.A – We offer to return the items within 30 days. The BUYER will ship the item at his own cost. We are extremely fair, and in the rare event of something out of the ordinary happening with our products or shipping, we will gladly work with you to find a solution.