Have same hardware for few years already and never had such a problem. It just started from nowhere while in a game! Maybe anyone have any idea what is the problem?
Using Asus Strix GTX 970 GPU!
Flashing artifacts like that can be caused by overheating RAM on the GPU. They can also be caused by it failing but that depends if you are overclocking or not.
Does this happen in every game? Are you running the newest Nvidia drivers? And if so have you tried rolling back to the previous drivers?
I tried other games and still same just some have more some less of that. I did try to renew /roll back drivers but nothing helps
Check your GPU and GPU memory temperatures (you can use MSI afterburner to check this) if they are high make sure the fans are working, you can also set a better fan curve to cool it more, see if that solves it. Clean out any dust from the cooler as well.
If this doesn't help then IMO the GPU is beginning to fail.