CPU Throttling When Gaming

[sh.elfadaly]

Hello guys
I have this problem that started few days, suddenly I get fps drop when gaming and when I checked the task manager I noticed that my CPU is running on 500 Mhz. So I installed ThrottleStop and noticed that when this happen I had bd prochot so disabling it from ThrottleStop fix the problem put after few minutes the system just shutdown. I checked the temperature of the CPU and GPU and both were fine. Also cleaned the dust and applied new thermal tube and still the same issue.

Screenshots from GPU-Z and XTU when the throttling happens:
https/imgur.com/a/CciBn

My spec:
lenovo z51-70
processor: core i7 5500u
vga: amd r9 m375
ram: 8G

 

[Mark RM]

It's time to replace the entire cooler and fan assembly , a cheap fix.