{"product_id":"be-quiet-silent-wings-pro-4-140mm-pwm-fan-bl099-2400rpm","title":"be quiet! Silent Wings Pro 4 140mm PWM Fan - BL099 2400RPM","description":"\u003cp\u003eThe be quiet! Silent Wings Pro 4 140mm PWM Fan is a high-performance case and radiator fan for builders who need adjustable cooling power without sacrificing acoustics. A three-position speed switch lets you tune maximum RPM between 1,100 and 2,400 rpm depending on your workload, while optimised blade geometry and a funnel-shaped outlet deliver high air pressure even at lower speeds.\u003c\/p\u003e\u003ch5\u003eWhy This Product\u003c\/h5\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed switch for three cooling modes\u003c\/strong\u003e — Medium-speed (1,100 rpm) for everyday use, high-speed (1,900 rpm) for sustained loads, or ultra-high-speed (2,400 rpm) for extreme cooling demand. Slide the switch on the fan housing to change modes without touching BIOS or software.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh static pressure for radiators and heatsinks\u003c\/strong\u003e — A tight blade-to-frame gap and funnel outlet generate 3.64 mm H₂O of static pressure at full speed, allowing it to work effectively against the resistance of dense cooling hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree mounting styles included\u003c\/strong\u003e — Radiator corners (pre-installed), anti-vibration dampers for chassis mounting, and plastic standoffs give you the right connection method for your setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFluid-dynamic bearing rated for 300,000 hours\u003c\/strong\u003e — The advanced FDB bearing and low-vibration 6-pole motor are engineered for longevity and quiet operation even at peak RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e36.8 dB(A) at maximum speed\u003c\/strong\u003e — Even at 2,400 rpm and full airflow, it remains audible but not intrusive—useful when you need cooling power but prefer to manage noise.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch5\u003eAt a Glance\u003c\/h5\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin-bottom:10px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e140 × 140 × 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eSpeed range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e1,100 to 2,400 rpm (three fixed modes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eAirflow (max)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e97.41 CFM (165.5 m³\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eStatic pressure (max)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e3.64 mm H₂O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eNoise (max)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e36.8 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eConnector\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e4-pin PWM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eBearing\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eFluid-dynamic (FDB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eLifespan\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e300,000 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch5\u003eCompatibility\u003c\/h5\u003e\u003cul\u003e\n\u003cli\u003e✓ 4-pin PWM connector: works with any motherboard PWM header or fan controller supporting 12 V PWM fan input.\u003c\/li\u003e\n\u003cli\u003e✓ 140 mm mounting holes: fits standard 140 mm case fan and radiator mounting points.\u003c\/li\u003e\n\u003cli\u003e✓ Radiator-optimised design: equally at home on tower coolers, AIO radiators, or case intake\/exhaust positions.\u003c\/li\u003e\n\u003cli\u003eNote: Speed switching is hardware-based (manual slide on the fan body), not software-controlled—you must physically access the fan to change modes, so consider placement before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch5\u003eBest For \/ Trade-offs\u003c\/h5\u003e\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRadiator cooling in high-end air or water-cooled builds\u003c\/li\u003e\n\u003cli\u003eUsers who want adjustable performance without BIOS tweaking\u003c\/li\u003e\n\u003cli\u003eBuilders prioritising low vibration and quiet operation at part load\u003c\/li\u003e\n\u003cli\u003eSystems where static pressure matters: dense radiators, heatsink fins, or restrictive cases\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eTrade-offs:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eRPM-limited builds:\u003c\/b\u003e If your case or cooler requires very low speeds (under 1,100 rpm), the medium-speed mode is the lowest this fan offers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSilent-at-all-costs systems:\u003c\/b\u003e 36.8 dB(A) at full speed is respectable but not whisper-quiet; passive cooling or larger-diameter, slower fans may be quieter overall.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAutomatic speed control only:\u003c\/b\u003e The hardware speed switch requires manual adjustment; there is no PWM voltage-based ramp between the three modes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch5\u003eDescription\u003c\/h5\u003e\u003cp\u003e\u003cstrong\u003eLEGENDARY SILENCE, EPIC PERFORMANCE AND FEATURES\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSilent Wings Pro 4 140mm PWM is the most progressive, performant and versatile fan by be quiet!\u003c\/p\u003e\u003cp\u003eThe fan blades are what makes a fan. It is for this reason that the fan blades of Silent Wings Pro 4 140mm PWM have been developed newly from scratch. The new blade arrangement enables a performance second to none for all possible operations. Be it in a case, on radiators or heat sinks.\u003c\/p\u003e\u003cp\u003eSilent Wings Pro 4 140mm PWM makes for extraordinary air pressure and therefor, significantly increases the system's performance. The decreased distance between the fan blades and the frame enables an extraordinarily high air pressure. By that, the Silent Wings Pro 4 140mm PWM allows the user to run even the most demanding applications.\u003c\/p\u003e\u003cp\u003eThe speed switch makes switching between medium, high-speed and ultra-high-speed of maximum RPM levels quick and easy. The Silent Wings Pro 4 140mm PWM alters its application with a simple slide to the right. Medium-speed is suitable for any operation that requires regular cooling performance. High-speed lets the fan spin faster, providing more cooling power. Ultra-high-speed ultimately offers enough rpm to cool even the most demanding hardware in high-end PC builds.\u003c\/p\u003e\u003cp\u003eSilent Wings Pro 4 140mm PWM has 3 mounting options in the scope of delivery. The pre-installed radiator corners are specially designed for radiators on which the incomparable performance of this high-end fan completely shines. On the other hand, for chassis use, the anti-vibration mounting is the first choice as they reduce vibrations to a minimum. The plastic mountings round up the scope.\u003c\/p\u003e\u003cp\u003eThe advanced fluid-dynamic bearing (FDB) enables a super long fan life of up to 300,000 hours.\u003c\/p\u003e\u003ch5\u003eSpecifications\u003c\/h5\u003e\u003cp\u003e\u003cstrong\u003eFan\u003c\/strong\u003e\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin-bottom:10px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003ebe quiet!\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eSilent Wings Pro 4 140mm PWM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003ePart number\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eBL099\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e140 × 140 × 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eConnector\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e4-pin PWM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eCable length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e500 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e0.258 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eMounting options included\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eRadiator corners, anti-vibration dampers, plastic standoffs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin-bottom:10px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eSpeed range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e1,100 to 2,400 rpm (three fixed modes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eSpeed modes\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eMedium (1,100 rpm), high (1,900 rpm), ultra-high (2,400 rpm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eAirflow @ 100% PWM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e97.41 CFM (165.5 m³\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eStatic pressure @ 100% PWM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e3.64 mm H₂O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eBearing type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eFluid-dynamic (FDB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eMotor type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e6-pole, 3-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eAcoustics \u0026amp; power\u003c\/strong\u003e\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin-bottom:10px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eNoise level @ 100% PWM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e36.8 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;font-weight:bold;width:35%;\"\u003eLifespan\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e300,000 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"be quiet!","offers":[{"title":"Default Title","offer_id":55666387812728,"sku":"BEQ-939","price":37.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/9119\/7218\/files\/61zebZRROiL.UL500.jpg?v=1789762879","url":"https:\/\/tech-syndicate.co.uk\/products\/be-quiet-silent-wings-pro-4-140mm-pwm-fan-bl099-2400rpm","provider":"Tech Syndicate","version":"1.0","type":"link"}