Abstract: A CPU heat sink includes a copper bottom panel, a plurality of copper radiating fins arranged in parallel on the bottom panel, the radiating fins each having a transverse foot bar, a plurality of strips respectively upwardly extended from the transverse foot bar and arranged in parallel, and a plurality of horizontal locating flanges respectively extended from the transverse foot bar at right angles, and an aluminum base molded on the bottom panel and the transverse foot bar and locating flanges of each radiating fin by die casting, the aluminum base having four upright posts disposed in four corners, the upright posts each having a square top and a screw hole on the square top, and four bearing blocks respectively fastened to the upright posts of the aluminum base and adapted to support a fan above the radiating fins, the bearing blocks each having a countersunk hole fastened to the screw hole of one upright post of the aluminum base by a screw, and at least one screw hole for the mounting of a fan.

Abstract: A computer mainframe housing for computer test purpose, which includes a rack formed by using four-way connectors to connect vertical frame bars and horizontal frame bars into a rectangular frame structure, a top board, an intermediate board and a bottom board respectively supported on the horizontal frame bar at different elevations for holding computer parts including a computer main board, a power supply device, floppy and hard diskdrives and a CD-ROM player, a plurality of clamping devices respectively symmetrically fastened to the vertical frame bars at different elevations, and four cover panels respectively fastened to the clamping devices and covered on the rack at four sides, the cover panels each having a plurality of coupling members respectively fastened to the clamping devices at the vertical frame bars, and openings for the passing of power cables and signal lines.

Abstract: A CPU cooling system for dissipating heat from a CPU in a computer which includes a water cooling type CPU heat dissipating unit fastened to the CPU of the computer for carrying heat away from the CPU, the water cooling type CPU heat dissipating unit defining a water circulation channel, a rack installed in the computer, a water and air cooling type heat dissipating unit mounted in the rack, the water and air cooling type heat dissipating unit including a water tank holding a liquid coolant, a heat sink mounted in the water tank, at least one first radiator each defining a water circulation channel, at least one cold discharge device each having a cold side disposed in contact with the at least one first radiator and a hot side disposed in contact with the heat sink, at least one fan disposed behind front air vents on the rack, and a second radiator disposed between the at least one fan and the at least one first radiator, the second radiator having evaporator coils a water-circulation pipe assembly for circu