This article covers be quiet! ケースファン Silent Wings Pro 4 120mm PWM White 3000rpm 国内正規代理店品 BL118 SLT-WNG-PRO-4.

Overview

The be quiet! Silent Wings Pro 4 120mm PWM White is a premium case fan from the German cooling specialist, engineered for high static pressure and low noise. With a maximum speed of 3000 RPM, airflow of 83.9 CFM, and noise rating of 36.9 dBA, it strikes an impressive balance between performance and acoustics. The fan is designed with radiators and heatsinks in mind, making it an excellent choice for liquid cooling loops and dense air coolers. A standout feature is the integrated speed switch on the fan hub, allowing users to select between medium, high, and ultra-high speed presets without software. The white color scheme is a treat for builders aiming for a clean, all-white aesthetic. The 6-pole motor and fluid dynamic bearing deliver smooth, vibration-free operation. In normal speed ranges, the fan is virtually inaudible, yet it still provides ample airflow when needed. Positioned as a mid-to-high-end solution, this fan competes with Noctua’s NF-A12x25 and Thermaltake’s Toughfan 12 Pro. It's ideal for enthusiasts who want both quiet computing and the ability to push air through restrictive radiators or mesh filters.

Compatibility Guide

This fan fits standard 120mm mounting holes, meaning it works with any case, CPU cooler, or radiator that supports 120mm fans. The connector is a standard 4-pin PWM, so it can be controlled by any motherboard header. It also works with 3-pin voltage control, though PWM allows finer speed adjustments. Power consumption is only 3.6W, so you can safely connect multiple fans to a single motherboard header (typically rated for 1A / 12W). The speed switch cable is short; you may need an extension if you plan to mount the switch outside the case for easy access.

Product Info

Released in 2024, the Silent Wings Pro 4 120mm PWM White has a retail price around ¥5,700 in Japan. It comes with a 3-year warranty from be quiet! (via official domestic distributors). The fan is a mid-to-high-end model, emphasizing both quiet operation and high static pressure. It uses a 6-pole motor and fluid dynamic bearing, rated for 300,000 hours MTBF. The included speed switch lets you set the maximum speed to approximately 1500, 2200, or 3000 RPM. Key specs: 120mm x 25mm dimensions, 3000 RPM max, 83.9 CFM airflow, 4.6 mmH₂O static pressure (estimated), 36.9 dBA noise, 4-pin PWM connector, 3.6W power draw.

Best Use Cases

Water cooling enthusiasts – If you have a thick radiator (30mm+), set the speed switch to ultra-high. The fan delivers enough static pressure to push air through dense fins, keeping coolant temperatures low. For quieter operation, switch to medium mode. White-themed PC builders – The white frame and blades, along with white cables, blend perfectly with white cases, motherboards, and cable extensions. It’s one of the few high-performance white fans with a speed switch. High-end gaming rigs – When used as a front intake fan, it provides strong airflow through mesh filters and over GPU areas. The noise is acceptable even at high speeds, though full speed is loud. Gamers who prioritize silence should consider a lower-RPM fan. Not recommended for – Budget builds where a $10 fan would suffice, or for users who need absolute silence at all times (look at Silent Wings 3 instead). ## Alternatives
Noctua NF-A12x25 PWM – Silent and efficient, but only available in brown/beige or black. No white option. It’s quieter at the same airflow, but lacks a speed switch. Thermaltake Toughfan 12 Pro – Cheaper, with magnetic levitation bearing. However, noise consistency and build quality are slightly behind the Silent Wings Pro 4. White version is limited. If you need a white fan with high static pressure and a built-in speed limiter, the Silent Wings Pro 4 is the best pick.

Things to Consider

At 3000 RPM, the fan is loud. Only use ultra-high mode when you need maximum cooling (e.g., during stress tests or summer heat). For daily use, medium or high mode is sufficient and much quieter. The speed switch cable is only about 10 cm long. Plan your routing carefully; you may need to mount the switch on the back of the case or use an extension cable. Also, ensure your case has enough clearance for the fan’s thickness (25mm). Some slim cases may not accommodate it, especially if used with a thick radiator in a push-pull configuration. ## FAQ Q: Can I use this fan on a CPU cooler? A: Yes, if the cooler uses 120mm clips. The fan comes with standard screws and rubber mounts; screws are better for cooler clips to avoid interference. Q: How does the speed switch work? A: The switch is connected to the fan via a thin cable. Slide it to one of three positions: Medium (~1500 RPM), High (~2200 RPM), or Ultra-High (3000 RPM). This sets the PWM maximum speed; the motherboard still controls lower speeds. Q: Is the white version slower than the black one? A: No, both have identical performance. Th

Product Disclosure (Amazon)

  • Manufacturer: be quiet!
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B0H389SF15
  • Note: This article covers a manufacturer-made product based on Amazon listing details.