The CoolBlue II is the second new processor cooler in the range of silent and cost effective SI / retail CPU coolers topped with the all new codename: BlueStar patented dc fan by Spire. The inverted 'BlueStar' fan design is an evolved version of the Diamond fan design. Spire engineers have reduced the spokes that hold the fan motor and elevated them to create a greater air intake area and to reduce the resistance of spokes which can sometimes cause a high-pitched sound. The Spire CoolBlue II new Micro-Processor cooler is made to fit all the latest AMD processors such as the Athlon and Sempron AM2 processors. The CoolBlue heat-sink contains a large copper core for faster heat dissipation and is equipped with a 3 prong clip on each side for solid and tool-free assembly. Main features: * Extremely silent BlueStar Fan * Copper based Heatsink design * Secure and solid Tool-free installation * Silent at only 19.0dBA! * Retail packed in full color packaging Product Includes : *Owner Manual *Stars-420 White grease Product Specification Socket 940 / 939 / AM2 Cooling kit Dimensions Heat sink : 77×80×32 mm (l × w × h) 12VDC Fan : 80×80×25 mm Bearing Sleeve bearing Rated speed 2000 RPM +/-10% Rated power 1.44 W Noise level 19.0 dBA Air flow 22.45 CFM Current 0.12 A Life hours Sleeve: 30.000 Features BlueStar Transparent dc fan, 6 prong tool-less clip, Copper base Connector 3 Pin, mainboard Application AMD : Athlon 64 ~ 5200+ (K8) Athlon 64 FX-55 (K8) Athlon 64 FX-57 (K8) Athlon 64 FX-60 (K8) Athlon 64 FX-74 ~ 0 GHz (K8) Athlon 64 X2 ~ 0 GHz (AM2) Athlon X2 ~ 9500 (AM2) Opteron ~ 2.6 (K8) Phenom X4 ~ 9600 (AM2/AM3) Sempron ~ 3300+ (K8) Turion 64 ~ 2.33 GHz MT-34 Thermal resistance 0.35 °C/W Thermal type Stars-420 white grease(Injection Tube,0.5g)