Question CPU runnig at 0.4GHz but the chip said that it can run 1.6GHz (It's just constantly stop at 0.4GHz)

Jun 23, 2020
4
0
10
Pls help, my clock speed is 0.4GHz constant and the base speed is 1.8GHz when I did stress test for cpu it is 22% can be reach as it maximum.
By the way, I'm on surface pro 6. Now I can't post my cpu in task manager up because of using too much cpu.