CPU heat sink

A CPU heat sink adapted for mounting on a CPU to support a fan for dissipation of heat from the CPU, comprising:

• a bottom panel made of a copper sheet by stamping, said bottom panel having a top recess and a flat bottom contact face for contact with the CPU;
• a plurality of metal radiating fins arranged in parallel on said bottom panel, said radiating fins each comprising a transverse foot bar, a plurality of stepped strips respectively upwardly extended from said transverse foot bar and arranged in parallel, and a plurality of horizontal locating flanges respectively extended from said transverse foot bar at right angles;
• a metal base molded on said bottom panel and the transverse foot bar and locating flanges of each of said radiating fins by die casting and filled up said top recess of said bottom panel, said metal base comprising four upright posts disposed in four corners, said upright posts each comprising a square top and a screw hole on said square top;
• and
• four bearing blocks respectively fastened to said upright posts of said metal base and adapted to support a fan above said radiating fins, said bearing blocks each comprising a countersunk hole fastened to the screw hole of one upright post of said metal base by a screw, and at least one screw hole for the mounting of a fan.