I recommend doing whatever it takes to avoid sending the laptop back to Asus, whether it is avoiding running everything on Ultra or taking Darnassus' advice and applying thermal paste to the CPU.
I bought the fully maxed out Asus G752VY a couple years ago the same week it released and when it came, I had several issues with it. For one thing, it had two 256GB SSDs with no working RAID solution at all, but was advertised as 512GB SSD on the specs. So who wants only 256GB for "C:\" and a "E:\" that is 256GB too? Additionally, when the laptop arrived, the plastic frame that presses against the actual matted screen was sticking out at the bottom of the screen so there was this wide gap between the frame and the actual screen. And it was causing light to "bleed" into the screen itself.
So I got on the phone with Asus to explain the problem within 1 week of owning the laptop. The Indian customer service representative sounded like he had a horrible, accusatory, and belligerent attitude regarding me shipping it back. He tried to suggest I did something to it when it was like that out of the box. I was trying to be nice on the phone the whole time and the entire conversation felt like a fight.
Before then, I had never done any business with Asus where I needed to ship something back, but that experience was so bad that I decided to avoid dealing with the customer service people at all costs.
In a genuine effort to avoid Asus customer service, I figured out how to resolve both of my problems on my own. I learned how the plastic frame was connected and snapped it back into place. I also took out the 2x256GB NVMe SSDs and inserted a 512GB SSD. I eventually took that out and replaced it with a 2GB NVMe SSD a couple weeks ago. The laptop still works great. Now I'm looking forward to the G703GI or whatever the best next-gen laptop will be in June!