VRM
Alternatively referred to as a processor power module, VRM is short for voltage regulator module and is a module that is either embedded into the motherboard or a separate small circuit board that regulates and supplies the correct voltage to the processor. By using a VRM, AMD and Intel can adjust the power to the processor instead of requiring the power supply to supply the correct current. One of the first motherboards to have a VRM was motherboards using the Socket 7 socket.
Also see: CPU definitions, Motherboard definitions, Power definitions, Voltage, Voltage regulator