Noctua nf s12a pwm ultra quiet 120mm pwm cooling fan the nf s12s pwm is noctuas latest 120mm pwm premium quality fan that offers full flexibility in quiet to ultra quiet case cooling thanks to its advanced acoustic optimisations specifically conceived for pressure demanding applications such as cpu cooling the classic nf p12 120mm fan helped to found noctuaacirceurotrades reputation as a top tier manufacturer of premium quality quiet cooling components and still impresses users with