an overheated protection circuitry for a central processing unit is provided , which is used when the working temperature of the cpu is higher than a first preset temperature or a second preset temperature . the cpu and a thermal module send out an abnormal signal respectively to inform a chipset to switch off a power supply . the overheated protection circuitry further includes a control module . the control module may synchronously receive the abnormal signal sent by the cpu and the thermal module and switch off the power supply when the working temperature of the cpu is overheated . therefore , even though the chipset is breakdown and unable to execute a switch - off power supply action , the control module can take over to execute the action of switching off the power supply .