Radiator Alphacool R27-S280 280 mm, 18 FPI, copper fins

The Alphacool R27-S280 is a 280 mm liquid-cooling radiator engineered for custom PC water-cooling loops. Featuring copper fins and a density of 18 fins per inch (FPI), this slim radiator offers a balance between thermal transfer area and airflow resistance. It fits dual 140 mm fan mounts and is intended for use in compact and mid-tower builds where efficient heat dissipation for CPUs or GPUs is required.

Advantages

Copper fins provide high thermal conductivity to transfer heat from the coolant to the airflow efficiently. The 18 FPI fin density moderates airflow restriction while supplying sufficient surface area for heat exchange, making it compatible with a range of fan speeds and static-pressure fans. The 280 mm form factor allows installation in systems that support dual 140 mm fans without occupying the space of larger radiators.

Suitable for

• Custom PC water-cooling loops for CPU cooling
• GPU liquid-cooling in compact and mid-tower cases
• Systems requiring a balance between cooling capacity and airflow resistance
• Builds where dual 140 mm fan mounts are available

Key specifications

• Radiator length: 280 mm form factor compatible with dual 140 mm fans
• Fin material: copper fins for improved thermal conduction
• Fin density: 18 fins per inch (FPI)
• Compatibility: designed for custom liquid-cooling loops in compact and mid-tower PC cases

How to use

Mount the radiator in a location that supports dual 140 mm fans, ensuring correct airflow direction for intake or exhaust according to your loop layout. Use appropriate fan screws and mounting hardware to secure fans and radiator to the case or bracket. Connect the radiator into the cooling loop with compatible fittings and tubing, and ensure all joints are tightened and pressure-tested before powering the system. Regularly check coolant levels and inspect for any signs of leakage or corrosion.

Recommendations

For best thermal results, pair the radiator with high static-pressure 140 mm fans and maintain moderate fan RPM to balance noise and cooling performance. When installing in compact cases, verify clearance for tubing and fittings; use angled fittings if necessary to reduce stress on connections. Periodic flushing and coolant replacement will help maintain heat transfer efficiency over time.