Open Hardware Monitor
Monitor core temps, speeds, and voltages
Open Hardware Monitor is a free, open-source software designed to monitor various hardware metrics such as temperature sensors, fan speeds, and voltages. It supports hardware monitoring chips on many motherboards and can read core temperature sensors of Intel and AMD processors, as well as sensors on ATI and Nvidia video cards. The tool is ideal for system administrators and enthusiasts who need to ensure their hardware is running within safe parameters.