A liquid-cooled heat sink has three parts: the water block, the X-clamp, and a copper plate. The water block has an inlet connected to a resin shell. Inside the shell, a fractal inlet manifold divides the inlet coolant flow into several sub streams that eventually exit in the form of uniformly distributed liquid jets through small nozzles/microjets at the bottom of the shell. The union between the shell and the copper plate forms a flood chamber, where the jets impinge on the copper plate, dissipating the heat supplied to the copper plate in contact with the heat source. The warm liquid is removed from the flood chamber through an outlet manifold embedded with the resin shell.