Noctua nf b9 redux 92mm pwm 1600rpm quiet case fan the classic nf b9 is a long standing favourite among enthusiast users around the world and has 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 b9 premium fan its industry grade sso bearing over 150000 hours mtbf rating and full 6 ye