2-Pack, Prolimatech Blue Vortex 12 - High Static Pressure and Airflow Fan (120mm) The Blue Vortex 12 is an extremely powerful 120mm computer fan that provides both high level performance and quiet operation. With attractive aesthetics, a very sturdy build, and long life the Blue Vortex 12 is an excellent economical solution for any build. The Blue Vortex 12 desktop fan moves up to 72 CFM of air while only producing 29.1 dBA of noise. Featuring two speed settings and an included low-voltage-reducer cable, the Blue Vortex 12 case fan can be run at either 1600 RPM for maximum performance or 1200 RPM for a quieter environment. The Blue Vortex 12 offers excellent static pressure: 1.05 mmH20 at 1600 RPM and 0.80 mmH20 at 1200 RPM. The adjustable fan speed and static pressure allow the Blue Vortex 12 to operate as either a very powerful radiator fan or as a quieter case fan. Sold individually, in 2-Packs, and 4-Packs. Also sold with Blue or Red LED's on Amazon.