Features : At Duty Cycle 0-20%: 1600 RPM At Duty Cycle 50%: 4000 RPM At Duty Cycle 100%: 8000 RPM At Duty Cycle 0-20%: 8.75 CFM At Duty Cycle 50%: 21.88 CFM At Duty Cycle 100%: 43.75CFM H.C.C.(Heatpipes Contact CPU) Copper Base & Aluminum Fins with Heatpipes embedded The Dynatron R5 2U Server Active CPU Cooler is designed for Intel Sandy Bridge EP/EX Processors up to 150 Watts. An H.C.C. (Heatpipes Contact CPU) copper base works in tandem with aluminum fins with 6mm heatpipes embedded to quickly transfer the heat from CPU while a 60mm dual-ball bearing PWM fan delivers quiet, efficient airflow for your cooling needs. The standard server board bolt-thru mounting mechanism and pre-applied thermal grease make this cooler easy to install as well. INTELLIGENT H.C.CThe Dynatron R5 2U Server Active CPU Cooler features a copper base that is in direct contact with the CPU to enhance heat conduction. 150-WATT COOLING COLUTIONFour 6mm heatpipes integrated with H.C.C (Heatpipes Contact CPU) copper base and high-density aluminum fins, plus an active side 2 ball bearing PWM fan, deliver up to 150 watts of cooling capability for Intel Sandy Bridge EP/EX Processors. ROHS COMPLIANTThe Dynatron R5 2U Server Active CPU Cooler is fully compliant with RoHS, and is tested for the presence of Lead (Pb), Cadmium (Cd), Mercury (Hg), Hexavalent chromium (Hex-Cr), Polybrominated biphenyls (PBB), and Polybrominated diphenyl ethers (PBDE). You can enjoy the computing cooling effects with confidence in knowing no hazardous materials are included in the cooler. ENERGY-SAVING PWMThe PWM function automatically adjusts fan speeds according to the CPU temperature for efficient cooling, minimized fan noise as well as energy saving.