Special features: ULTRA style heatsink fin array, with copper base, elevates heatsink"s overall quality. Large heatsink fin array, provides dissipating area of up to 150*125mm, make complete use of the airflow, with 140mm or 120mm fan. Heat-sink width of 55mm clears tall memory spreaders on LGA2011 platforms. Heat-sink fin stack shifted away from VGA to clear 1st PCI-E slot. Includes one Thermalright TY-147A PWM fan, 300-1300 RPM, Ultra low noise at 21 dBA at max rpm. Fan-clips are compatible with both 140mm and 120mm fan.