Patent ID: 8405986

Claim:
A motherboard, comprising: a first connector; a fan device, comprising a fan and a second connector electrically connected to the fan, the second connector being engaged with the first connector; and a fan control circuit, comprising: a primary power terminal connected to a first power terminal of the motherboard; a standby power terminal connected to a second power terminal of the motherboard; a voltage output terminal connected to a power terminal of the fan through the first connector and the second connector in order; and a detection terminal connected to a power state signal terminal of the motherboard to receive a power state signal from the motherboard, wherein when the motherboard is turned on, the fan control circuit is configured to output the voltage of the first power terminal of the motherboard to the power terminal of the fan through the primary power terminal and the voltage output terminal according to a first state of the power state signal, to rotate the fan, and when the motherboard is turned off, the fan control circuit is configured to output the voltage of the second power terminal of the motherboard to the power terminal of the fan for a predetermined time according to a second state of the power state signal, to make the standby power terminal supply a working voltage for the fan to continue to maintain rotation of the fan for the predetermined time.