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Case Fan Gelid Silent 4 40 mm, 12 V, up to 4200 RPM, 1.5 mmH2O (black/white)
Gelid Silent 4 is a compact 40 mm case fan engineered for cooling in limited spaces. Operating at 12 V and reaching up to 4200 RPM with a maximum static pressure of 1.5 mmH2O, this fan is available in black or white and is intended for targeted spot ventilation, small form-factor systems, heatsink or chipset cooling where space is constrained.
The fan delivers high rotational speed and elevated static pressure while maintaining low acoustic output thanks to optimized fan blade geometry and precise balance. A Hydro Dynamic bearing ensures extended operational life up to the specified mean time to failure, enabling reliable continuous use in compact environments. Its small dimensions and lightweight construction allow installation in narrow mounting points without significant impact on surrounding components.
Install the Gelid Silent 4 in the intended mounting location using appropriate screws or clips for 40 mm fans, ensuring correct airflow orientation for the required cooling direction. Connect the fan to a 12 V compatible header or power source; observe polarity and, if applicable, secure the cable to prevent interference with other components. For PWM or voltage-controlled setups, verify compatibility with the system controller before applying variable fan control.
Use the fan where compact size and targeted airflow are needed. For optimal performance, maintain clear intake and exhaust paths, avoid obstructing the impeller, and periodically clean dust from the blades. When planning multiple fans in tight spaces, account for cumulative airflow and acoustic levels; consider using this model for spot cooling rather than primary case airflow in larger systems.
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