Noctua NF-R8 Raised-Blade design and SSO Bearing Fan_ Retail. Spec. Type : Fan Fan Size : 80 x 80 x25mm Compatibility : CPU Cooler, Water-Cooling Radiator and Case Bearing Type : SSO-Bearing ( Self-stabilising oil-presure bearing ) Blade Geometry : Raised Blade Design RPM +/- 10% : 1800 RPM ( standard ), 1300 RPM ( w/ L.N.A ), 800RPM ( w/ U.L.N.A.) Air Flow : 53m³/h (standard), 39m³/h ( w/L.N.A. ), 26m³/h ( W/ U.L.N.A ) Acoustical Noise : 17 dB(A)/standard, 10dB(A)(w/ L.N.A ), 7 dB(A) ( w/ U.L.N.A.) Input Power : 1.32W / 0.11A Voltage Range : 3 - 13V MTBF > 150,000 h. Dimension : 80 x 80x 25 mm. Weight : 0.4Lbs Features : Raised Blade Design SSO Bearing ( Self-stabilizing Oil-pressure bearing ) design. Scope of Delivery Ultra-Low-Noise-Adapter ( U.L.N.A) Low-Noise-Adapter ( L.N.A) 4 Vibration Compensators, 3 to 4 Pin Adapter and Screws Warranty : 6 Years.