My Acer predator Helios 300 (PH315-52) 2019 Model- Shows artifacts in gaming while in turbo mode

the funny thing is 

this does not happen in UBISOFT games like Assassins Creed Odyssey and Ghost Recon Wild lands

In battlefield 5 : i have attached the recorded game play screenshots you can see the red and green dot like artifacts
which hard crashes after some time in turbo mode but works fine in normal mode. and if i switches to fast mode in predator sense app the game works fine but show green  and red dots like artifacts occasionally.

In Shadow of the tomb raider:
in turbo mode Which works fine but shows some green  and red dots like artifacts occasionally.
fast mode and normal mode are fine

in Plague tale: innocence:
in turbo mode works fine but shows some green  and red dots like artifacts occasionally.

in Doom 4:
in turbo mode works fine but shows some green  and red dots like artifacts occasionally.

fifa 19:
in turbo mode works fine no artifacts at all.

in wolfenstein II : shadow of the colossus:
in turbo mode works fine no artifacts at all.

in Pubg lite:
in turbo mode works fine but shows some green  and red dots like artifacts occasionally.

if this varies in games will i get a product replacement as this does not happen in all of the games?
how can i test my graphics card to know if my graphics card is a lemon? pls help

No dude. Still no solution, Im thinking about going for warranty. The GPU seems like it can't handle overclocking. Going with it may result in GPU failure in near future.