High clockspeed in Idle

After upgrading from windows 7 to windows 10 started to notice the cpu clock says it's stuck at full (3192 MHz) even at idle (0% utilization). In the Rainmeter monitoring CPU also totally stuck at full clock. How to get it back to normal (around 700 MHz) like before?

i’m using Galax 1060 exoc. i monitor using Msi Afterburner. but it showing that my clock speed 1544 and memory speed 4006mhz (these are the maximum value of this gpu) even when idle the values are same. for that my gpu temp is always 45+ can anyone tell me how to solve this? i cheked my other...