Patent ID: 7463999

Claim:
A method for monitoring ATX computer power supply unit, comprising the steps of: (a) measuring temperature in the ATX power supply unit by a monitor device provided with SMBus interface, then inputting the temperature signal to a monitor chip for processing, and outputting a control signal by the monitor chip to control fan speed by an amplifying drive circuit; (b) measuring working voltage of the ATX power supply unit by a voltage measuring circuit of the monitor device provided with SMBus interface, then inputting the working voltage signal to the monitor chip for processing; (c) measuring a fan speed of the ATX power supply unit by a speed measuring circuit of the monitor device provided with SMBus interface, then inputting the fan speed signal to the monitor chip for processing; (d) transmitting the parameters of temperature, working voltage and fan speed through the SMBus interface of the monitor device to host computer which is connected with the SMBus interface, and monitoring the working status of the power supply unit by a program of the host computer, the monitoring is made by the host computer mainly and the monitor chip in assistant.