Intel E7500 Design Guide - Page 25

Reference Thermal Solutions R 6.3.1 Heatsink Orientations To enhance the efficiency of the reference thermal solution, it is important for the designer to orient the fins properly with respect to the mean airflow direction. Simulation and experimental evidence have shown that the MCH heatsink thermal performance is enhanced when the fins are aligned with the mean airflow direction (Figure 12). Aligning the heatsink 45° relative to the airflow is acceptable but delivers reduced thermal performance. Figure 12. Preferred Heatsink Orientation F in O rie n tatio n Orthogonal Mean Air Flow Direction Incorrect Correct Parallel M ean Air Flow Direction heatsk_orient Intel® E7500 MCH Thermal and Mechanical Design Guidelines 25