Thermaltake CPU Cooler for Intel LGA775 Prescott FMB2 with PWM CL-P0101. Application for Intel Processor No.580 LGA 775 - Prescott. Radiate fin with copper core design provides excellent heat dissipation. Riveting the core copper touches the heat center directly and conducts heat quickly. PWM (Pulse Width Modulation) equipped fourth pin accepts the PWM signal from the motherboard can compact cooler fan and motherboard convenience. Push pin design require no tool to install.