Thermaltake CL-P0391 Ruby Orb CPU Cooler for Intel LGA775 and AMC K8/AM2 Tt-patented radian crotched fin design providing superior airflow Incredible 140 aluminum fin count maximizes heat dissipation area Fan with 12-centimeter red LED Whispering quiet 17dBA operation Universal design for Intel Socket LGA775 and AMD Socket 754/939/940/AM2