ROG Laptop crashing when playing certain games

Aug 17, 2018
So I bought a ASUS ROG Strix GL702VS-RS71, and anytime I play a game like Destiny 2 or Total War: Warhammer, even a Mid settings, In the middle of gameplay, It will freeze for 5 seconds, have colors flash crazily on the screen, and then completely reboot. I bought this computer back in March and it has started this problem back in July, and at first I thought it was just my memory getting too cramped. I don't think that's the problem now, and I'm scared I might have to send it back to get it repaired, or even worse, buy a new laptop, even though this one cost me $2000. I don't know what to do, so help would be greatly appreciated.