Noctua 80mm 1800RPM 7dB(A) Noctua Fan NF-R8-1800 Raised Blade Design SSO Bearing Fan 8cm Retail. Rotation Speed with L.N.A. (+/- 10%): 1300 RPM. Rotation Speed with U.L.N.A. (+/- 10%): 800 RPM. Acoustic Noise with L.N.A.: 10 dB(A). Scope of Delivery: Ultra-Low-Noise Adaptor (U.L.N.A.), Low-Noise Adaptor (L.N.A.), 4 Vibration Compensators, 3: 4-Pin Adaptor, 4 Fan Screws.