Guidelines

Reference Thermal Solutions

Intel

E7500 MCH Thermal and Mechanical Design Guidelines 25

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

heatsk_orient

Orthogonal

Mean Air Flow

Direction

Parallel Mean

Air Flow

Direction

Fin

Orientation

Incorrect

Correct