Fan Jonsbo FR-505BR 12 cm Black White 800-1800 RPM 47.2 CFM

The Jonsbo FR-505BR 12 cm fan is a case cooling fan designed to balance airflow and quiet operation for desktop computer systems. With a measured speed range of 800–1800 RPM and a reported maximum airflow of 47.2 CFM, this fan aims to improve internal case ventilation while fitting standard 120 mm mounting holes. The model is offered in black and white finishes to match a variety of build aesthetics.

Advantages

The fan delivers a wide rotational range that supports both low-noise idle periods and higher-speed cooling under load, while maintaining a low acoustic profile at its lower speed setting. Optimized blade geometry and motor control provide effective air movement and stable performance across the specified RPM band. Its standard 120 mm form factor ensures compatibility with common case fan locations and mounting brackets.

Suitable for

• Case ventilation for desktop gaming and productivity PCs
• Replacing or upgrading existing 120 mm intake or exhaust fans
• Cooling radiator or single-fan AIO setups where a 120 mm fan is required
• Systems where a balance between airflow and low noise is preferred

Key specifications

• Fan diameter: 120 mm
• Rotational speed: 800–1800 RPM
• Maximum airflow: 47.2 CFM
• Low-noise level at minimum speed: 13.3 dB
• Available colours: black and white

How to use

Install the fan in a compatible 120 mm mounting location inside the computer case using the provided screws or vibration-damping mounts if available. Connect the fan to an appropriate header on the motherboard or to a fan controller that supports the fan's power connector and speed control method. Orient the fan so that air flows in the intended direction — typically intake at front/bottom and exhaust at rear/top — and verify rotational direction after powering up. Adjust fan speed settings in BIOS or software to achieve the desired balance between cooling performance and noise.

Recommendations

For optimal cooling, combine this fan with complementary intake and exhaust fans to establish a consistent airflow path. Regularly clean the fan blades and surrounding filters to maintain airflow and minimize noise increase over time. When installing near radiators or obstructed vents, ensure there is adequate clearance to preserve rated airflow performance.