Patent ID: 8391096

Claim:
A power supply system applicable to memory modules mounted in memory slots, the power supply system comprising: a control unit comprising a basic input/output system (BIOS) and a control chip connected to the BIOS and the memory slots, wherein the BIOS controls the control chip to output a control signal according to the number of the memory modules mounted in the memory slots; and a voltage regulator connected to the control chip through first and second general purpose input/output (GPIO) buses, wherein the voltage regulator receives the control signal from the control chip through the first and second GPIO buses and regulates power supply modes, to output different phase voltages to the memory modules mounted in the memory slots; wherein when the number of the memory modules mounted in the memory slot is less than 3, the power supply modes of the voltage regulator is regulated to a one-phase power mode by the BIOS; when the number of the memory module mounted in the memory slot is greater than 3 and less than 6, the power supply modes of the voltage regulator is regulated to a two-phase power mode by the BIOS; when the number of the memory module mounted in the memory slot is greater than 6, the power supply modes of the voltage regulator is regulated to a full multiphase power mode by the BIOS.