Same problem here with same laptop, did you fix it? When i put in Turbo mode or Manual mode with memory OC get stuttering and FPS drop. I saw when this happen clock GPU pass to 1800MHZ and clock memory to 800MHZ for a second and then go back in normal state. I used whisper mode for a while (for high temperatures) and i start to think this create the problem. I need to know if is something that can i fix or is hardware damaged
I am shocked about your GPU temperatures too, when i play mine reach 86°