Keep your PC cool and quiet with the Effizio Quiet Fans. With a smaller fan profile, larger fan sweep area, and a domed motor this fan delivered performance like none other on the market. The EFX-12-15 is the only line of fan which on the delivers on the promise of completely balanced noise to performance. Crafted with precision engineering for the sleekest fan with optimal cooling power. SilenX EFX1215 120 mm 15DBA Fluid Dynamic Bearing Fan.