This is about my partners build that I've been trying to fix for the past entire day. It was running fine up until today. To start things out the PC is a Lenovo prebuilt, the Lenovo IdeaCentre T540, it has a i5-9400, and a GTX 1660 Ti, when playing Overwatch 2, when it goes above 60 fps the screen will turn black, and lose all control, and the systems fans will go to max speed, and will not restart unless I manually shut it down with the systems power button. I've tried many things to fix this, and I tried the GPU in my system and had the same results, I've tried many drivers and the same issue between them all. I'm wondering if the GPU is faulty, but hoping not because we don't have the money to replace it, any thoughts on what the problem could be?