A combined-natural-and-forced-convection heat sink system including a
plurality of fins protruding from a first surface of a conductive
material, a plurality of air channels formed between the first surface
and an opposing second surface of the conductive material and at least
one fan. The plurality of fins forms a natural-convection heat sink. The
plurality of air channels forms a forced-convection heat sink. The
natural-convection heat sink and the forced-convection heat sink form a
combined-natural-and-forced-convection heat sink. Each air channel has an
input end opening on an input surface of the conductive material and each
air channel has an output end opening on an output surface of the
conductive material. The at least one fan is configured to generate an
air flow through the air channels when at least one of the fans is
operating.