I've had this before, a few years back, and it amounted to overheating of my GPU. Assuming you've updated your drivers, you might wanna look at the temps.
I RECOMMEND using GPU-Z
What kind of connection to your PC do you have?
I'd try looking into a ground loop noise isolator and researching ground loops in general as it sounds like that's what's going on.
This might work for you: https://smile.amazon.com/dp/B06XQYN77L/ref=cm_sw_r_cp_apa_i_y1mWCbY0V1KE6