ANTEC A400 RGB CPU COOLERnnAutomatically controls the fan speed according to the temperature of CPU efficiently and decreases fan noisenAttach the aluminum cold plate to the surface of a CPU directly, and it can constantly reduce the heat by passing the thermal energy to every finnHigh thermal conductivity can take the heat out of the CPU quicklynAn add-on ANTEC Golden Grease with professional formula brings better viscosity and heat-transferring efficiency, making your CPU way cooler!nSpeed 600 – 1800 RPM + 10%nNoise Level 20.3 db(A) – 34.5 db(A)