Hello, Since the release of Ryzen 3rd Gen CPU my CPU was stuck in boost mode and voltages would not drop below 1.44 for the CPU, i have a solution which works for me below and may work for you also and only involves customizing the Windows Power Saver Power Plan.
This will let your CPU idle around 29 to 33 degrees Celsius at 3200MHz then when under load the CPU will ramp up to its max unlocked speed of 4200MHz, see images below and test with Cinebench Release 20 Single core test.
This has been tested on the Ryzen 3600 but may also work for other 3rd Gen Processors with similar problems.
BEGIN CPU SINGLE CORE LOAD:
NOW AT MAX CLOCK SPEED.
15 seconds after the screenshot was taken the voltages in increased to 1.44 and held till end.
NOW SYSTEM RETURNS TO IDLE SPEED AND VOLTAGE AND TEMP!