Patent ID: 8629680

Claim:
A central processing unit (CPU) test device to determine whether a CPU core controller of a motherboard can supply a start voltage to a CPU socket mounted on the motherboard, the CPU test device comprising: a voltage detection pin to be connected to the CPU socket to detect a voltage of an electronic device connected to the CPU socket to determine whether the motherboard mounting the CPU socket is powered on; an analog to digital (A/D) converter connected to the voltage detection pin to receive the detected voltage and convert the detected voltage into a digital signal; and a microcontroller connected to the A/D converter to receive the digital signal to control the CPU core controller to output the start voltage to the CPU socket according to the digital signal; wherein the microcontroller stores a predetermined start voltage message, the microcontroller reads a start voltage message stored in the CPU core controller after controlling the CPU core controller to output the start voltage, and determines whether the CPU core controller supplies the start voltage to the CPU socket through comparing the read start voltage message with the predetermined start voltage message.