Screen goes black, fans turn at full speed

I was playing Cyberpunk 2077, after a few minutes, the screen went black, said that there was no signal, and fans of GPU(?) began spinning at full speed.

a few months before this, my pc didn't cause such problems. But now I also live this problem with Battlefront 2 and my pc's performance on Oblivion remastered dropped as well. What can I do? is it about ram? PSU? GPU?

Maybe an important information: It was running good with only 16 gb ram as well, but I am a noob about computers, so I thought it wasn't enough so I bought an 16 gb ram, but it didn't fix the problem.

my system:

NVIDIA GeForce RTX 4070 Ti

ryzen 7 5800x

32 gb ram

asus tuf gaming x570