Power supply

A power supply, comprising:

• a bottom case and a top cover, said bottom case and said top cover being fitted together to delimit an accommodating space;
• a circuit board, mounted on said bottom case and located within said accommodating space, said circuit board being provided thereon with a plurality of electronic components and a plurality of heat-dissipating elements, each of said plurality of heat-dissipating elements being provided correspondingly to one of said plurality of electronic components and allowed to conduct heat, respectively, each of said plurality of heat-dissipating elements being provided with a mounting hole;
• and
• a heat-dissipating fan, including a supporting frame, a driving module provided on said supporting frame, and a fan blade set covering said driving module and being driven by said driving module to rotate, said supporting frame being presented as a flat plate and provided with a plurality of connecting ribs, each of the plurality of connecting ribs being respectively connected to one of said mounting holes, said heat-dissipating fan being not provided with a barrier wall around said fan blade set.