Noctua nf s12b redux pwm 1200rpm 120mm quiet case fan specifically designed for low impedance case cooling applications the classic nf s12b is a long standing favourite among enthusiast users around the world and helped to found noctuas reputation as a top tier manufacturer of premium quality quiet cooling components the new redux edition reissues this award winning model in a streamlined accessibly priced package that has been reduced to the essential core the nf s12b premium fan its in