Predator G3-571 heats a lot when connected to power and using graphic intensive programs(otherwise at low 50s).the
cpu is fine hovering at 85C but the gpu stays at 95C (takes 5
mins to reach it, and stays...). But when the laptop is not connected
to power, it performs way better than the throttled situation and also
the temps of both cpu and gpu hower below 75C. i tried many things such
as repasting , undervolting (both cpu and gpu), cleaning the vents, fans
etc. Any game title's fps drops to 15-25 from 60+ in just 5 mins. i
bought this computer july of 2018 and it didnt behave the same for the
first 7-8 months. Even after reducing the graphic settings of the game ,
the gpu temperature doesn't become any better. i would be glad to hear
suggestions for my problem. thank you 
Laptop Specifications:
intel i7-7700HQ
NVIDIA GTX 1060 (6gb vram)
16 gb ram
256 gb ssd.