Cooler Master MFL-B4DW-16NP2-R2

Overview

The Cooler Master MFL-B4DW-16NP2-R2 is a 140 mm case fan designed to enhance airflow in PC builds while maintaining low noise levels. It features blades that are ten percent larger than previous models, spinning up to 1600 RPM to deliver up to 59.51 cubic feet of air per minute with a maximum noise output of just 27 dBA. This fan is suitable for gaming rigs, workstations, and home office systems that require efficient cooling without excessive sound.

Key features

• Blades enlarged by ten percent to increase airflow and cooling efficiency.
• PWM support allows the motherboard to automatically adjust fan speed for optimal temperature control and noise reduction.
• Rifle bearing design reduces friction, extending the fan’s lifespan and ensuring smooth operation.
• Hybrid frame construction minimizes vibration, preventing rattling noises inside the case.
• Addressable RGB lighting with dual loop rings and frosted blades creates an even and customizable glow visible from all angles.
• Includes an ARGB controller for lighting customization when motherboard headers are unavailable.
• Comes with both 3-pin and 4-pin connectors, offering compatibility with a wide range of motherboards and fan hubs.
• Versatile installation options: can be used as intake, exhaust, or mounted on radiators for liquid cooling setups.

Key specs

• Fan diameter: 140 mm
• Maximum fan speed: 1600 RPM
• Airflow: 59.51 CFM
• Noise level: 27 dBA
• Bearing type: Rifle bearing
• Lighting: Addressable RGB with dual loop rings
• Connectors: 3-pin and 4-pin PWM

Connectivity and compatibility

This fan supports both 3-pin and 4-pin connectors, making it compatible with virtually all modern motherboards and fan hubs. The included ARGB controller allows for lighting customization even if your motherboard lacks an addressable RGB header. This flexibility ensures easy integration into a variety of PC builds, whether you are upgrading an existing system or assembling a new one.

Installation and setup

Installation is straightforward thanks to the standard 140 mm size and included connectors. The fan fits easily into standard fan mounts and can be positioned as an intake to cool critical components like graphics cards, mounted on a 280 mm radiator for liquid cooling, or placed at the rear of compact cases to improve exhaust airflow. The PWM control lets your system manage fan speed automatically, balancing cooling needs with quiet operation.

Ideal uses and environments

This case fan is well suited to users who need reliable cooling with minimal noise, such as gamers, content creators, and professionals working in quiet home offices. Its customizable RGB lighting adds visual appeal to builds where aesthetics matter. Whether you are building a high-performance gaming rig or refreshing an older workstation, this fan provides the airflow and lighting control needed to keep your system stable and visually striking.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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