Front & rear airflow incident angles are designed in different directions. This cross bending fin technology produces cooling performance with minimum noise. 3 composite heat pipes & pure copper cross bending fins quickly cools down the heat from the CPU. Zalman's ' Compositd Heatpipe' features a ' Sintered Metal' type wick, resulting in outstanding capillary pumping performance. & a high thermal conductive design of ' Axial Greeves' which increases the heat transfer rate by 50% compared to ordinary heatpipes. Cross Bending ultra quiet powerful 120mm Front Fan & 140mm Center Fan produces top performance. Compatible with Intel LGA2011/1366/1155/1156/775 & AMD FM2/FM1/AM3+/AM3/AM2+/AM2