Question CPU Speed stuck at 3.70

[henzsz]

I noticed that my pc had been running slow and i noticed that my cpu cooler had died and my cpu was overheating, so i bought a new one. This didnt fix the issues and my pc is still running slow. My task manager is saying that my cpu speed is stuck at 3.70 idle. I have tried reinstalling windows and resetting bios settings and this is still happening. My pc can barely run chrome. What do i do?

 

[rgd1101]

full system spec?

 

[henzsz]

full system spec?

i5 9600k
2060 super
16gb 3200mhz
z390 a pro
650w power supply
ML240L aio