Patent ID: 7743817

Claim:
A thermal module comprising: a fixing rack being provided at an inner side with at least one stopper and at least one projected portion located adjacent to the stopper, and the projected portion being parallel to but lower than the stopper, so that a height difference is existed between the stopper and the projected portion; and a heat sink being fitted in the fixing rack and provided along an outer periphery with at least one vertically extended groove; wherein when the heat sink is fitted in the fixing rack with an upper surface of the heat sink facing upward, the groove is located at a position corresponding to the projected portion on the fixing rack, allowing the projected portion to slide into the groove and the upper surface of the heat sink to upward abut on the higher stopper; and, when the heat sink is vertically turned by 180 degrees to fit in the fixing rack with a bottom surface of the heat sink facing upward, the groove on the heat sink is horizontally offset from the projected portion on the fixing rack, allowing the upward-facing bottom surface of the heat sink to upward abut on the lower projected portion, so that an increased distance is existed between the upward-facing bottom surface of the heat sink and the fixing rack due to the height difference between the stopper and the projected portion.