Thermallake Technology"s version : Silent Boost. for up to: AMD Athlon XP 3400+ application Features an all copper heatsink with a special cross venting fan system. .Low...21 dBA. Multi-directional air intake increases airflow while keeping the relative noise at minimal. AMD Athlon XP UP TO 3400+ Dim: 82 x 70 x 49 MM 27.5 CFM 2450 +/- 10% RPM 21 dB 1.56 W Ball Bearing 3 PIN ATX Power Connector P/N A1889-01 Fan Dimension 80x80x25 mm Heatsink Dimension 82x70x49 mm (41 fins)