Thermaltake Meorb Low Profile CPU Cooler for HTPC Case with 4-Pin PWM Fan - CLP0527 MeOrb provide more effective heat dissipation and cooling performance for your PC Optimized radial heat sink offer highest surface area The 90mm fan provide cooling performance and extremely quite at a mere 16dBA, with special PWM function, MeOrb is compatible for socket Intel LGA775 and AMD K8 939/940/AM2/AM2+