I always get the Corsair AF vs SP fan ranges mixed up….

In summary:

• Corsair AF = AirFlow
  • When airflow is not restricted. No obstructions.
  • Thin Blades x 9

• Corsair SP = Static Pressure
  • When airflow is restricted. Obstructions such as radiators, case grills or heat sinks.
  • Fat Blades x 7