Features of Heatsink(Active) CPU Intel P4 LGA775 Up to 3.6GHz for 1U server Specification Dimension of Heatsink(Active) 82mm×80mm×27mm Weight 420g Heatsink Material Pure Copper Dimension of Heatsink(Active) 82mmx80mmx12mm Fan Dimension 70mm×70mm×15mm RPM 6000 rpm Ball bearing 2Ball Rated V/A 12V/0.55A Max CFM 7.4 cfm dBA 46.8 dBA Static Pressure 0.592 inch-H2O