Thermaltake TR2 M21 RX A4021 CPU Cooler for the Intel Processor 115W LGA775-Prescott Designed for the Intel Processor 115W LGA775-Prescott Radian Aluminum fins provide optimal airflow for good heat dissipation High-precise riveting technology to bond the copper core for maximum heat conductivity Powerful and silent reversed fan, reduce the noise from air-rebounding, only 18dBA Push pin design requires no tool to install