Cooling Fan Alphacool Apex Stealth 140 mm 2500 RPM PWM — metal frame, matte black

The Alphacool Apex Stealth 140 mm cooling fan is a metal-frame, matte black fan designed for PC case and radiator cooling. With PWM speed control and a maximum rotational speed of 2500 RPM, it provides adjustable airflow and is aimed at users who require stable, reliable cooling for system cases, liquid-cooling radiators and high-performance builds. The robust metal frame improves structural rigidity and helps maintain consistent fan operation under sustained use.

Advantages

The fan's PWM compatibility allows motherboard or controller-based automatic speed regulation to balance cooling performance and noise. The metal frame offers enhanced durability and reduced vibration compared with many plastic fans, while the matte black finish integrates unobtrusively in most builds. With a 140 mm size and up to 2500 RPM, the unit delivers higher static pressure and airflow suitable for radiators and densely packed systems.

Suitable for

• Case cooling in mid-tower and full-tower desktop PCs
• Installation on liquid-cooling radiators for CPU or GPU loops
• High-performance or overclocked systems requiring improved airflow
• Builds that prefer a durable metal-frame fan with PWM control

When it may not be suitable

The Alphacool Apex Stealth may not be ideal for ultra-quiet or silent-focused systems if run constantly at or near its maximum speed, since higher RPMs can increase noise levels compared with lower-speed fans. It also may be over-specified for very small form-factor cases that cannot accommodate 140 mm fans.

Key specifications

• Fan diameter: 140 mm
• Maximum rotational speed: 2500 RPM
• Speed control: PWM (pulse-width modulation)
• Frame material: metal
• Color/finish: matte black
• Intended use: case and radiator cooling

How to use

Install the fan into a compatible 140 mm fan mounting position in your case or onto a 140 mm radiator using the provided screws or radiator fan mounting hardware. Connect the fan's PWM cable to a motherboard 4-pin PWM header or a compatible PWM fan controller to enable automatic speed regulation. Configure fan curves in BIOS or the motherboard utility to achieve the desired balance of airflow and acoustics. Periodically check mounting screws and clean dust from the blades and frame to maintain performance.

What to consider before purchase

• Confirm your case or radiator has available 140 mm mounting locations.
• Ensure your motherboard or controller supports a 4-pin PWM connection for speed control.
• Consider expected noise levels at higher RPMs and whether a lower-speed fan is preferable for silent builds.
• Verify clearance and compatibility around other components in your build.

Usage recommendations

For a balance between cooling and noise, set a PWM fan curve that increases speed under load and reduces RPM during idle. Use metal-frame fans like the Alphacool Apex Stealth on radiators or intake/exhaust positions where structural rigidity and sustained airflow are important. Regular dust maintenance will extend service life and maintain performance.