Hi guys, so I've found the temporary solution for this. I've searched through the web and I've found people with the same problem, but in their case the temporary solution is unplug and plug it again. Which I've tried, the speed does goes up again for like 1-3 minutes and it starting to drop again, in the comment section someone replied with their solution which, bootup with battery and plug it after the laptop successfully booted up. And it works, but I still have to use ThrottleStop to give maximum performance. I've stress test my CPU and the speed doesn't dropped a single core, which is amazing. But this is a temporary solution, I might have to replace my battery in the future. I'll info in this thread the result after I replace my dead battery.
Hi it's my first time posting here, So my laptop's cpu suddenly dropping to 1.7 GHz when playing, and it won't get back up to 3.4GHz or even to the base speed. But if I ended the game the speed raise back to 3.4GHz. The interesting part is the utilization are the same 60% on 1.7GHz and 60% on 3.4 GHz. I've already stress tested the CPU and it shows power throttle but the CPU speed isn't decreasing, I've tried throttlestop but dell won't allow me to undervolt the CPU. This is very weird I've checked the temps are on 70-85 max on CPU and everything else is fine. I've disabled Turbo Boost but the cpu speed keeps slowing down to 1.7 GHz even worse to 0.40 GHz. (This condition is on playing games not on idle) The only thing that works is disabling intelppm on registry by changing the value of start from 3 to 4 (means off) but the speed won't increase above base speed and won't decrease either. My device: Dell Inspiron 15 7567 Intel Core i7 7700HQ [NAME].80GHz GeForce GTX 1050Ti 4GB 16 GB RAM Things I've tried: Disabling Turbo Boost, Cstate, Speedstep Disabling BD Prochot in ThrottleStop Disabling Power Throttle in Group Policy   Thank you
Dell Inspiron 15 7567 CPU Slow down with no reason